password: Sets the password. This argument is case sensitive. It must be a plaintext string of 1 to 16 characters, or a ciphertext string of 33 to 53 characters.

ip: Checks IP related fields in LSPs.

osi: Checks OSI related fields in LSPs.

NOTE:

Whether a password should use ip or osi is not affected by the actual network environment.

Description

Use area-authentication-mode to specify the area authentication mode and a password.

Use undo area-authentication-mode to restore the default.

By default, no area authentication is configured.

The password in the specified mode is inserted into all outgoing Level-1 packets (LSP, CSNP, and PSNP) and is used for authenticating the incoming Level-1 packets.

With area authentication configured, IS-IS discards incoming routes from untrusted routers.

Routers in a common area must have the same authentication mode and password.

If neither ip nor osi is specified, OSI related fields are checked.

Related commands: reset isis all, domain-authentication-mode, and isis authentication-mode.

Examples

# Configure the area authentication mode as simple, and set the plaintext password to ivg.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] area-authentication-mode simple ivg

auto-cost enable

Syntax

auto-cost enable

undo auto-cost enable

View

IS-IS view

Default level

2: System level

Parameters

None

Description

Use auto-cost enable to enable automatic link cost calculation.

Use undo auto-cost enable to disable the function.

By default, this function is disabled.

After automatic link cost calculation is enabled, the link cost is automatically calculated based on the bandwidth reference value of an interface. When the cost-style is wide or wide-compatible, the cost value of an interface is calculated by using the formula: Cost = (reference bandwidth value/link bandwidth) × 10. When the cost style is of another type: if the interface bandwidth does not exceed 10 Mbps, the interface cost equals 60; if the interface bandwidth does not exceed 100 Mbps, the interface cost equals 50; if the interface bandwidth does not exceed 155 Mbps, the interface cost equals 40; if the interface bandwidth does not exceed 622 Mbps, the interface cost equals 30; if the interface bandwidth does not exceed 2500 Mbps, the interface cost equals 20; if the interface bandwidth exceeds 2500 Mbps, the interface cost equals 10.

Related commands: bandwidth-reference and cost-style.

Examples

# Enable automatic link cost calculation.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] auto-cost enable

bandwidth-reference (IS-IS view)

Syntax

bandwidth-reference value

undo bandwidth-reference

View

IS-IS view

Default level

2: System level

Parameters

value: Specifies the bandwidth reference value in the range of 1 to 2147483648 Mbps.

Description

Use bandwidth-reference to set the bandwidth reference value for automatic link cost calculation.

Use undo bandwidth-reference to restore the default.

By default, the bandwidth reference value is 100 Mbps.

Related commands: auto-cost enable.

Examples

# Configure the bandwidth reference of IS-IS process 1 as 200 Mbps.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] bandwidth-reference 200

circuit-cost

Syntax

circuit-cost value [ level-1 | level-2 ]

undo circuit-cost [ level-1 | level-2 ]

View

IS-IS view

Default level

2: System level

Parameters

value: Specifies the link cost value. The value range varies with cost styles.

· For styles narrow, narrow-compatible and compatible, the cost value is in the range of 0 to 63.

· For styles wide and wide-compatible, the cost value is in the range of 0 to 16777215.

level-1: Applies the link cost to Level-1.

level-2: Applies the link cost to Level-2.

Description

Use circuit-cost to set a global IS-IS link cost.

Use undo circuit-cost to restore the default.

By default, no global link cost is configured.

If no level is specified, the specified cost applies to both Level-1 and Level-2.

Related commands: isis cost and cost-style.

Examples

# Set the global Level-1 link cost of IS-IS process 1 to 11.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] circuit-cost 11 level-1

cost-style

Syntax

cost-style { narrow | wide | wide-compatible | { compatible | narrow-compatible } [ relax-spf-limit ] }

undo cost-style

View

IS-IS view

Default level

2: System level

Parameters

narrow: Receives and sends only narrow cost style packets (The narrow cost is in the range of 0 to 63).

wide: Receives and sends only wide cost style packets (the wide cost is in the range of 0 to 16777215).

compatible: Receives and sends both wide and narrow cost style packets.

narrow-compatible: Receives both narrow and wide cost style packets, but sends only narrow cost style packets.

wide-compatible: Receives both narrow and wide cost style packets, but sends only wide cost style packets.

relax-spf-limit: Allows receiving routes with a cost greater than 1023. If this keyword is not specified, any route with a cost bigger than 1023 will be discarded. This keyword is only available when compatible or narrow-compatible is included.

Description

Use cost-style to set a cost style.

Use undo cost-style to restore the default.

By default, only narrow cost style packets can be received and sent.

Related commands: isis cost and circuit-cost.

Examples

# Configure the router to send only narrow cost style packets, but receive both narrow and wide cost style packets.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] cost-style narrow-compatible

default-route-advertise (IS-IS view)

Syntax

default-route-advertise [ route-policy route-policy-name | [ level-1 | level-1-2 | level-2 ] ] *

undo default-route-advertise [ route-policy route-policy-name ]

View

IS-IS view

Default level

2: System level

Parameters

route-policy-name: Specifies the name of a routing policy, a case-sensitive string of 1 to 63 characters.

level-1: Advertises a Level-1 default route.

level-1-2: Advertises both Level-1 and Level-2 default routes.

level-2: Advertises a Level-2 default route.

Description

Use default-route-advertise to advertise a default route.

Use undo default-route-advertise to disable default route advertisement.

By default, default route advertisement is disabled.

If no level is specified, a Level-2 default route is advertised.

The Level-1 default route is advertised to other routers in the same area, while the Level-2 default route is advertised to all the Level-2 and Level-1-2 routers.

Using the apply isis level-1 command in routing policy view will generate a default route in a Level-1 LSP. Using the apply isis level-2 command in routing policy view will generate a default route in a Level-2 LSP. Using the apply isis level-1-2 command in routing policy view will generate a default route in a Level-1 LSP and Level-2 LSP.

Examples

# Advertise a Level-2 default route.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] default-route-advertise

display isis brief

Syntax

display isis brief [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

process-id: Displays IS-IS brief configuration information for the IS-IS process. The process ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays IS-IS brief configuration information for the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS brief configuration information of the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display isis brief to view IS-IS brief configuration information.

Examples

# Display IS-IS brief configuration information.

<Sysname> display isis brief

ISIS (1) Protocol Brief Information :

network-entity:

10.0000.0000.0001.00

is-level :level-1-2

cost-style: narrow

preference : 15

Lsp-length receive : 1497

Lsp-length originate : level-1 1497

level-2 1497

maximum imported routes number : 10000

Timers:

lsp-max-age: 1200

lsp-refresh: 900

Interval between SPFs: 10

Table 1 Command output

Field	Description
network-entity	Network entity name.
is-level	IS-IS Routing level.
cost-style	Cost style.
preference	Preference.
Lsp-length receive	Maximum LSP that can be received.
Lsp-length originate	Maximum LSP that can be generated.
maximum imported routes number	Maximum number of redistributed Level 1/Level 2 IPv4 routes.
Timers	· lsp-max-age—Maximum life period of LSP. · lsp-refresh—Refresh interval of LSP. · Interval between SPFs—Interval between SPF calculations.

display isis debug-switches

Syntax

display isis debug-switches { process-id | vpn-instance vpn-instance-name } [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

process-id: Specifies an IS-IS process by its ID in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays the IS-IS debugging switch state for the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS debugging switch state for the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display isis debug-switches to display IS-IS debugging switch state.

Examples

# Display the debugging switch state of IS-IS process 1.

<Sysname> display isis debug-switches 1

IS-IS - Debug settings.

IS-IS SPF Triggering Events debugging is on

display isis graceful-restart status

Syntax

display isis graceful-restart status [ level-1 | level-2 ] [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

level-1: Displays the IS-IS Level-1 Graceful Restart state.

level-2: Displays the IS-IS Level-2 Graceful Restart state.

process-id: Specifies an IS-IS process by its ID in the range of 1 to 65535.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS Graceful Restart status for the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display isis graceful-restart status to display IS-IS Graceful Restart status.

Examples

# Display IS-IS Graceful Restart status.

<Sysname> display isis graceful-restart status

Restart information for IS-IS(1)

--------------------------------------------------------------------

IS-IS(1) Level-1 Restart Status

Restart Interval: 150

SA Bit Supported

Total Number of Interfaces = 1

Restart Status: RESTARTING

Number of LSPs Awaited: 3

T3 Timer Status:

Remaining Time: 140

T2 Timer Status:

Remaining Time: 59

IS-IS(1) Level-2 Restart Status

Restart Interval: 150

SA Bit Supported

Total Number of Interfaces = 1

Restart Status: RESTARTING

Number of LSPs Awaited: 3

T3 Timer Status:

Remaining Time: 140

T2 Timer Status:

Remaining Time: 59

Table 2 Command output

Field	Description
Restart Interval	Graceful Restart interval.
SA Bit Supported	The SA bit is set.
Total Number of Interfaces = 1	The current IS-IS interface number.
Restart Status	Graceful Restart status.
Number of LSPs Awaited	Number of LSPs not obtained by the GR restarter from GR helpers during LSDB synchronization.
T3 Timer Status	Remaining time of T3 timer.
T2 Timer Status	Remaining time of T2 Timer.

display isis interface

Syntax

display isis interface [ statistics | [ interface-type interface-number ] [ verbose ] ] [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

statistics: Displays IS-IS interface statistics.

interface-type interface-number: Specifies an IS-IS interface whose statistics is to be displayed.

verbose: Displays detailed IS-IS interface information.

process-id: Displays the IS-IS interface information of the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays the IS-IS interface information of the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS interface information of the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display isis interface to display IS-IS interface information.

Examples

# Display brief IS-IS interface information.

<Sysname> display isis interface

Interface information for ISIS(1)

---------------------------------

Interface: Vlan-interface 12

Id IPV4.State IPV6.State MTU Type DIS

001 Up Down 1497 L1/L2 No/No

# Display detailed IS-IS interface information.

<Sysname> display isis interface verbose

Interface information for ISIS(1)

---------------------------------

Interface: Vlan-interface999

Id IPV4.State IPV6.State MTU Type DIS

001 Up Down 1497 L1/L2 No/No

SNPA Address : 000f-e237-c6e0

IP Address : 192.168.1.48

Secondary IP Address(es) :

IPV6 Link Local Address :

IPV6 Global Address(es) :

Csnp Timer Value : L1 10 L2 10

Hello Timer Value : L1 10 L2 10

Hello Multiplier Value : L1 3 L2 3

Lsp Timer Value : L12 33

Lsp Transmit-Throttle Count : L12 5

Cost : L1 10 L2 10

Priority : L1 64 L2 64

BFD : Disabled

MPLS TE Status : ON

INTF L1 TE Status : OFF

INTF L2 TE Status : ON

TE Cost : 0

TE Admin Group : 0

TE Max Bandwidth : 0

TE Max Res Bandwidth : 0

# Displays detailed information of the specified IS-IS interface.

<Sysname> display isis interface tunnel 1 verbose

Interface information for ISIS(1)

---------------------------------

Interface: Tunnel1

Id IPv4.State IPv6.State MTU Type DIS

005 Up Down 16384L1/L2 --

SNPA Address : 0000-0000-0000

IP Address : 10.1.1.4

Secondary IP Address(es) :

IPv6 Link Local Address :

IPv6 Global Address(es) :

Csnp Timer Value : L1 10 L2 10

Hello Timer Value : 10

Hello Multiplier Value : 3

Lsp Timer Value : L12 33

Lsp Transmit-Throttle Count : L12 5

Cost : L1 10 L2 10

Priority : L1 64 L2 64

Retransmit Timer Value : L12 5

BFD : Disabled

Tunnel L1 State : OFF

Tunnel L2 State : ON

Tunnel Type : AA

Tunnel Metric : 0

Destination Router ID : 5.5.5.5

Table 3 Command output

Field	Description
Interface	Interface type and number.
Id	Circuit ID.
IPV4.State	IPv4 state.
IPV6.State	IPv6 state.
MTU	Interface MTU.
Type	Interface link adjacency type.
DIS	Whether the interface is elected as the DIS or not.
SNPA Address	Subnet access point address.
IP Address	Primary IP address.
Secondary IP Address(es)	Secondary IP addresses.
IPV6 Link Local Address	IPv6 link local address.
IPV6 Global Address(es)	IPv6 global address.
Csnp Timer Value	Interval for sending CSNP packets.
Hello Timer Value	Interval for sending Hello packets.
Hello Multiplier Value	Number of invalid Hello packets.
Lsp Timer Value	Minimum interval for sending LSP packets.
Lsp Transmit-Throttle Count	Number of LSP packets sent each time.
Cost	Cost of the interface.
Priority	DIS priority.
Retransmit Timer Value	LSP retransmission interval over the point-to-point link.
BFD	Whether BFD is enabled on the interface.
MPLS TE Status	Whether MPLS TE is enabled on the interface.
INTF L1 TE Status	Whether level-1 MPLS TE is enabled on the interface.
INTF L2 TE Status	Whether level-2 MPLS TE is enabled on the interface.
TE Cost	MPLS TE cost configured on the interface.
TE Admin Group	TE link administration group.
TE Max Bandwidth	TE link maximum bandwidth.
TE Max Res Bandwidth	TE link maximum reserved bandwidth.
Tunnel L1 State	IS-IS TE tunnel level-1 state.
Tunnel L2 State	IS-IS TE tunnel level-2 state.
Tunnel Type	Tunnel type.
Tunnel Metric	IGP metric of the TE tunnel.
Destination Router ID	Destination address of TE tunnel interface.

# Display IS-IS interface statistics.

<sysname> display isis interface statistics

Interface Statistics information for ISIS(1)

--------------------------------------------

Type IPv4 Up/Down IPv6 Up/Down

LAN 0/1 -/-

P2P 4/0 -/-

Table 4 Command output

Field	Description
Type	Network type of the interface: · LAN for broadcast network. · P2P for point-to-point network.
IPv4 UP	Number of IS-IS interfaces in up state.
IPv4 DOWN	Number of IS-IS interfaces in down state.
IPv6 UP	Number of IS-ISv6 interfaces in up state. If IPv6 is not enabled, this field displays a hyphen (-).
IPv6 DOWN	Number of IS-ISv6 interfaces in down state. If IPv6 is not enabled, this field displays a hyphen (-).

display isis lsdb

Syntax

display isis lsdb [ [ l1 | l2 | level-1 | level-2 ] | [ lsp-id lspid | lsp-name lspname ] | local | verbose ] * [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

l1, level-1: Displays the level-1 LSDB.

l2, level-2: Displays the level-2 LSDB.

lspid: Specifies an LSP ID, in the form of sysID.Pseudo ID-fragment num, where sysID represents the originating node or pseudo node, and Pseudo ID is separated by a dot from sysID and by a hyphen from fragment num.

lspname: Specifies the LSP name, in the form of Symbolic name.Pseudo ID-fragment num, where Pseudo ID is separated by a dot from Symbolic name and by a hyphen from fragment num. If the Pseudo ID is 0, specify the LSP name in the form Symbolic name-fragment num.

local: Displays LSP information generated locally.

verbose: Displays LSDB detailed information.

process-id: Displays the LSDB of the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays the LSDB of the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the LSDB of the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display isis lsdb to display IS-IS link state database.

If no level is specified, both Level-1 and Level-2 link state databases are displayed.

Examples

# Display brief Level-1 LSDB information.

<Sysname> display isis lsdb level-1

Level-1 Link State Database

LSPID Seq Num Checksum Holdtime Length ATT/P/OL

--------------------------------------------------------------------------

1111.1111.1111.00-00 0x00000004 0xa76 563 68 0/0/0

1111.1111.1112.00-00* 0x00000006 0x498d 578 84 0/0/0

1111.1111.1112.01-00* 0x00000001 0x4c0e 556 55 0/0/0

*-Self LSP, +-Self LSP(Extended), ATT-Attached, P-Partition, OL-Overload

# Display detailed Level-1 LSDB information.

<Sysname> display isis lsdb level-1 verbose

Database information for ISIS(1)

--------------------------------

Level-1 Link State Database

LSPID Seq Num Checksum Holdtime Length ATT/P/OL

--------------------------------------------------------------------------

1111.1111.1111.00-00 0x00000005 0x877 1090 68 0/0/0

SOURCE 1111.1111.1111.00

NLPID IPV4

AREA ADDR 10

INTF ADDR 3.1.1.2

NBR ID 1111.1111.1112.01 COST: 10

IP-Internal 3.1.1.0 255.255.255.0 COST: 10

1111.1111.1112.00-00* 0x00000007 0x478e 1120 84 0/0/0

SOURCE 1111.1111.1112.00

NLPID IPV4

AREA ADDR 10

INTF ADDR 3.1.1.1

INTF ADDR 2.1.2.2

NBR ID 1111.1111.1112.01 COST: 10

IP-Internal 3.1.1.0 255.255.255.0 COST: 10

IP-Internal 2.1.2.0 255.255.255.0 COST: 10

1111.1111.1112.01-00* 0x00000002 0x4a0f 1118 55 0/0/0

SOURCE 1111.1111.1112.01

NLPID IPV4

NBR ID 1111.1111.1112.00 COST: 0

NBR ID 1111.1111.1111.00 COST: 0

*-Self LSP, +-Self LSP(Extended), ATT-Attached, P-Partition, OL-Overload

Table 5 Command output

Field	Description
LSPID	Link state packet ID.
Seq Num	LSP sequence number.
Checksum	LSP checksum.
Holdtime	LSP lifetime, which decreases as time elapses.
Length	LSP length.
ATT/P/OL	· ATT—Attach bit. · P—Partition bit. · OL—Overload bit. 1 means the bit is set and 0 means the bit is not set.
SOURCE	System ID of the originating router.
NLPID	Network layer protocol the originating router runs.
AREA ADDR	Area address of the originating router.
INTF ADDR	IP address of the originating router's IS-IS interface.
INTF ADDR V6	IPv6 address of the originating router's IS-ISv6 interface.
NBR ID	Neighbor ID of the originating router.
IP-Internal	Internal IP address and mask of the originating router.
IP-External	External IP address and mask of the originating router.
IP-Extended	Extended IP address and mask of the originating router.
COST	Cost.
HOST NAME	Dynamic host name of the originating router.
ORG ID	Original system ID of the virtual system ID of the originating router.
Auth	Authentication information of the originating router.
IPV6	Internal IPv6 address and prefix of the originating router.
IPV6-Ext	External IPv6 address and prefix of the originating router.

display isis mesh-group

Syntax

display isis mesh-group [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

process-id: Displays IS-IS mesh-group configuration information for the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays IS-IS mesh-group configuration information for the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS mesh-group configuration information for the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display isis mesh-group to display IS-IS mesh-group configuration information.

Examples

# Configure VLAN-interface 10 and VLAN-interface 20 to belong to mesh-group 100.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis mesh-group 100

[Sysname-Vlan-interface10] interface vlan-interface 20

[Sysname-Vlan-interface20] isis mesh-group 100

# Display the configuration information of IS-IS mesh-group.

[Sysname-Vlan-interface20] display isis mesh-group

Mesh Group information for ISIS(1)

----------------------------------

Interface Status

Vlan10 100

Vlan20 100

Table 6 Command output

Field	Description
Interface	Interface name.
Status	Mesh-group the interface belongs to.

display isis name-table

Syntax

display isis name-table [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

process-id: Displays the host name-to-system ID mapping table for the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays the host name-to-system ID mapping table for the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the host name-to-system ID mapping table for the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display isis name-table to display the host name-to-system ID mapping table.

Examples

# Configure a name for the local IS system.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] is-name RUTA

# Configure a static mapping for the remote IS system (system ID 0000.0000.0041, host name RUTB).

[Sysname-isis-1] is-name map 0000.0000.0041 RUTB

# Display the IS-IS host name-to-system ID mapping table.

[Sysname-isis-1] display isis name-table

Name table information for ISIS(1)

---------------------------------------------------------------

System ID Hostname Type

6789.0000.0001 RUTA DYNAMIC

0000.0000.0041 RUTB STATIC

Table 7 Command output

Field	Description
System ID	System ID.
Hostname	Hostname name.
Type	Mapping type (static or dynamic)

display isis peer

Syntax

display isis peer [ statistics | verbose ] [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

statistics: Displays IS-IS neighbor statistics.

verbose: Displays detailed IS-IS neighbor information. Without the keyword, the command displays brief IS-IS neighbor information.

process-id: Displays the IS-IS neighbor information of the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays the IS-IS neighbor information of the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS neighbor information of the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display isis peer to display IS-IS neighbor information.

Examples

# Display brief IS-IS neighbor information.

<Sysname> display isis peer

Peer information for ISIS(1)

----------------------------

System Id: 1111.1111.1111

Interface: Vlan-interface11 Circuit Id: 1111.1111.1112.01

State: Up HoldTime: 23s Type: L1(L1L2) PRI: 64

System Id: 1111.1111.1111

Interface: Vlan-interface11 Circuit Id: 1111.1111.1112.01

State: Up HoldTime: 23s Type: L2(L1L2) PRI: 64

# Display detailed IS-IS neighbor information.

<Sysname>display isis peer verbose

Peer information for ISIS(1)

----------------------------

System Id: 1111.1111.1111

Interface: Vlan-interface11 Circuit Id: 1111.1111.1112.01

State: Up HoldTime: 27s Type: L1(L1L2) PRI: 64

Area Address(es):10

Peer IP Address(es): 3.1.1.2

Uptime: 00:38:15

Adj Protocol: IPV4

System Id: 1111.1111.1111

Interface: Vlan-interface11 Circuit Id: 1111.1111.1112.01

State: Up HoldTime: 28s Type: L2(L1L2) PRI: 64

Area Address(es):10

Peer IP Address(es): 3.1.1.2

Uptime: 00:38:15

Adj Protocol: IPV4

Table 8 Command output

Field	Description
System Id	System ID of the neighbor.
Interface	Interface connecting to the neighbor.
Circuit Id	Circuit ID.
State	Circuit state.
HoldTime	Holdtime. Within the holdtime if no hellos are received from the neighbor, the neighbor is considered down. If a hello is received, the holdtime is reset to the initial value.
Type	Circuit type: · L1—Means the circuit type is Level-1 and the neighbor is a Level-1 router. · L2—Means the circuit type is Level-2 and the neighbor is a Level-2 router. · L1(L1L2)—Means the circuit type is Level-1 and the neighbor is a Level-1-2 router. · L2(L1L2)—Means the circuit type is Level-2 and the neighbor is a Level-1-2 router.
PRI	DIS priority of the neighbor.
Area Address(es)	The neighbor's area address.
Peer IP Address(es)	IP address of the neighbor.
Uptime	Time that elapsed since the neighbor relationship was formed.
Adj Protocol	Adjacency protocol.

# Display IS-IS neighbor statistics.

<Sysname> display isis peer statistics

Peer Statistics information for ISIS(1)

---------------------------------------

Type IPv4 Up/Init IPv6 Up/Init

LAN Level-1 0/0 0/0

LAN Level-2 0/0 0/0

P2P 3/0 0/0

Table 9 Command output

Field	Description
Type	Neighbor type: · LAN Level-1—Number of Level-1 neighbors whose network type is broadcast. · LAN Level-2—Number of Level-2 neighbors whose network type is broadcast. · P2P— Number of neighbors whose network type is P2P.
IPv4 Up	Number of IPv4 neighbors in up state.
IPv4 Init	Number of IPv4 neighbors in init state.
IPv6 Up	Number of IPv6 neighbors in up state.
IPv6 Init	Number of IPv6 neighbors in init state.

display isis route

Syntax

display isis route [ ipv4 ] [ [ level-1 | level-2 ] | verbose ] * [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

ipv4: Displays IS-IS IPv4 routing information (the default).

verbose: Displays detailed IS-IS IPv4 routing information.

process-id: Displays the IS-IS IPv4 routing information of the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays the IS-IS IPv4 routing information of the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS IPv4 routing information of the public network is displayed.

level-1: Displays Level-1 IS-IS routes.

level-2: Displays Level-2 IS-IS routes.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display isis route to display IS-IS IPv4 routing information.

If no level is specified, both Level-1 and Level-2 routing information will be displayed.

Examples

# Display IS-IS IPv4 routing information.

<Sysname> display isis route 1

Route information for ISIS(1)

-----------------------------

ISIS(1) IPv4 Level-1 Forwarding Table

-------------------------------------

IPV4 Destination IntCost ExtCost ExitInterface NextHop Flags

--------------------------------------------------------------------------

1.1.0.0/16 20 NULL Vlan11 1.2.1.1 R/L/-

1.2.0.0/16 10 NULL Vlan11 Direct D/L/-

Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set

ISIS(1) IPv4 Level-2 Forwarding Table

-------------------------------------

IPV4 Destination IntCost ExtCost ExitInterface NextHop Flags

--------------------------------------------------------------------------

1.1.0.0/16 20 NULL Vlan11 1.2.1.1 R/L/-

1.2.0.0/16 10 NULL Vlan11 Direct D/L/-

Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set

Table 10 Command output

Field	Description
Route information for ISIS(1)	Route information for IS-IS process 1.
ISIS(1) IPv4 Level-1 Forwarding Table	IS-IS IPv4 routing information for Level-1.
ISIS(1) IPv4 Level-2 Forwarding Table	IS-IS IPv4 routing information for Level-2.
IPv4 Destination	IPv4 destination address.
IntCost	Interior routing cost.
ExtCost	Exterior routing cost.
ExitInterface	Exit interface.
NextHop	Next hop.
Flags	Routing state flag: · D—Direct route. · R—The route has been added into the routing table. · L—The route has been advertised in an LSP. · U—A route's penetration flag. Setting it to UP can prevent an LSP sent from L2 to L1 from being sent back to L2.

# Display detailed IS-IS IPv4 routing information.

<Sysname> display isis route verbose

Route information for ISIS(1)

-----------------------------

ISIS(1) IPv4 Level-1 Forwarding Table

-------------------------------------

IPV4 Dest : 1.1.0.0/16 Int. Cost : 20 Ext. Cost : NULL

Admin Tag : - Src Count : 2 Flag : R/L/-

NextHop : Interface : ExitIndex :

1.2.1.1 Vlan11 0x00000008

IPV4 Dest : 1.2.0.0/16 Int. Cost : 10 Ext. Cost : NULL

Admin Tag : - Src Count : 2 Flag : D/L/-

NextHop : Interface : ExitIndex :

Direct Vlan11 0x00000000

Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set

ISIS(1) IPv4 Level-2 Forwarding Table

-------------------------------------

IPV4 Dest : 1.1.0.0/16 Int. Cost : 20 Ext. Cost : NULL

Admin Tag : - Src Count : 2 Flag : -/-/-

IPV4 Dest : 1.2.0.0/16 Int. Cost : 10 Ext. Cost : NULL

Admin Tag : - Src Count : 3 Flag : D/L/-

NextHop : Interface : ExitIndex :

Direct Vlan11 0x00000000

Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set

Table 11 Command output

Field	Description
Route information for ISIS(1)	Route information for IS-IS process 1.
ISIS(1) IPv4 Level-1 Forwarding Table	IS-IS IPv4 routing information for Level-1.
ISIS(1) IPv4 Level-2 Forwarding Table	IS-IS IPv4 routing information for Level-2.
IPV4 Dest	IPv4 destination.
Int. Cost	Internal route cost.
Ext. Cost	External route cost.
Admin Tag	Tag.
Src Count	Count of advertising sources.
Flag	Route state flag: · R—The route have been installed into the routing table. · L—The route has been flooded in an LSP. · U—Route leaking flag. If it is UP, routes from L2 to L1 cannot be advertised back to L2.
Next Hop	Next hop.
Interface	Output interface.
ExitIndex	Index of the output interface.

display isis spf-log

Syntax

display isis spf-log [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

process-id: Displays IS-IS SPF log information for the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays IS-IS SPF log information for the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS SPF log information for the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display isis spf-log to display IS-IS SPF log information.

Examples

# Display IS-IS SPF log information.

<Sysname> display isis spf-log

SPF Log information for ISIS(1)

-------------------------------

Level Trig.Event No.Nodes Duration StartTime

L2 IS_SPFTRIG_PERIODIC 2 0 13:3:24

L1 IS_SPFTRIG_PERIODIC 2 0 13:18:8

L2 IS_SPFTRIG_PERIODIC 2 0 13:18:8

L1 IS_SPFTRIG_PERIODIC 2 0 13:32:28

L2 IS_SPFTRIG_PERIODIC 2 0 13:32:28

L1 IS_SPFTRIG_PERIODIC 2 0 13:44:0

L2 IS_SPFTRIG_PERIODIC 2 0 13:44:0

L1 IS_SPFTRIG_PERIODIC 2 0 13:55:43

-->L2 IS_SPFTRIG_PERIODIC 2 0 13:55:43

L1 IS_SPFTRIG_PERIODIC 2 0 11:54:12

L2 IS_SPFTRIG_PERIODIC 2 0 11:54:12

L1 IS_SPFTRIG_PERIODIC 2 0 12:7:24

L2 IS_SPFTRIG_PERIODIC 2 0 12:7:24

L1 IS_SPFTRIG_PERIODIC 2 0 12:21:24

L2 IS_SPFTRIG_PERIODIC 2 0 12:21:24

L1 IS_SPFTRIG_PERIODIC 2 0 12:35:24

L2 IS_SPFTRIG_PERIODIC 2 0 12:35:24

L1 IS_SPFTRIG_PERIODIC 2 0 12:49:24

L2 IS_SPFTRIG_PERIODIC 2 0 12:49:24

L1 IS_SPFTRIG_PERIODIC 2 0 13:3:24

Table 12 Command output

Field	Description
SPF Log information for ISIS(1)	SPF log information for IS-IS process 1.
Level	SPF calculation level.
Trig.Event	SPF triggered event.
No.Nodes	Number of SPF calculation nodes.
Duration	SPF calculation duration.
StartTime	SPF calculation start time.

display isis statistics

Syntax

display isis statistics [ level-1 | level-1-2 | level-2 ] [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

level-1: Displays IS-IS Level-1 statistics.

level-1-2: Displays IS-IS Level-1-2 statistics.

level-2: Displays IS-IS Level-2 statistics.

process-id: Displays IS-IS statistics for the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays IS-IS statistics for the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS statistics for the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display isis statistics to display IS-IS statistics.

Examples

# Display IS-IS statistics.

<Sysname> display isis statistics

Statistics information for ISIS(1)

----------------------------------

Level-1 Statistics

------------------

Learnt routes information:

Total IPv4 Learnt Routes in IPv4 Routing Table: 1

Total IPv6 Learnt Routes in IPv6 Routing Table: 0

Imported routes information:

IPv4 Imported Routes:

Static: 0 Direct: 0

ISIS: 0 BGP: 0

RIP: 0 OSPF: 0

IPv6 Imported Routes:

Static: 0 Direct: 0

ISISv6: 0 BGP4+: 0

RIPng: 0 OSPFv3: 0

Lsp information:

LSP Source ID: No. of used LSPs

0000.0000.0003 002

Level-2 Statistics

------------------

Learnt routes information:

Total IPv4 Learnt Routes in IPv4 Routing Table: 0

Total IPv6 Learnt Routes in IPv6 Routing Table: 0

Imported routes information:

IPv4 Imported Routes:

Static: 0 Direct: 0

ISIS: 0 BGP: 0

RIP: 0 OSPF: 0

IPv6 Imported Routes:

Static: 0 Direct: 0

ISISv6: 0 BGP4+: 0

RIPng: 0 OSPFv3: 0

Lsp information:

LSP Source ID: No. of used LSPs

0000.0000.0003 002

Table 13 Command output

Field		Description
Statistics information for ISIS(processid)		Statistics for the IS-IS process.
Level-1 Statistics		Level-1 Statistics.
Level-2 Statistics		Level-2 Statistics.
Learnt routes information		Numbers of learnt IPv4 and IPv6 routes.
Imported routes information	IPv4 Imported Routes.	Redistributed IPv4 routes: · Static. · Direct. · IS-IS. · BGP. · RIP. · OSPF.
Imported routes information	IPv6 Imported Routes.	Redistributed IPv6 routes: · Static. · Direct. · IS-ISv6. · BGP4+. · RIPng. · OSPFv3.
Lsp information		LSP information: · LSP Source ID—ID of the source system. · No. of used LSPs—number of used LSPs.

domain-authentication-mode

Syntax

domain-authentication-mode { md5 | simple } [ cipher ] password [ ip | osi ]

undo domain-authentication-mode

View

IS-IS view

Default level

2: System level

Parameters

md5: Specifies the MD5 authentication mode.

simple: Specifies the simple authentication mode.

cipher: Sets a ciphertext password. If this keyword is not specified, you set a plaintext password.

password: Sets the password. This argument is case sensitive. It must be a plaintext string of 1 to 16 characters, or a ciphertext string of 33 to 53 characters.

ip: Checks IP related fields in LSPs.

osi: Checks OSI related fields in LSPs.

NOTE:

Whether a password should use ip or osi is not affected by the actual network environment.

Description

Use domain-authentication-mode to specify the routing domain authentication mode and a password.

Use undo domain-authentication-mode to restore the default.

By default, no routing domain authentication is configured.

The configured password in the specified mode is inserted into all outgoing Level-2 packets (LSP, CSNP, and PSNP) and is used for authenticating the incoming Level-2 packets.

All the backbone routers must have the same authentication mode and password.

If neither ip nor osi is specified, the OSI related fields in LSPs are checked.

Related commands: area-authentication-mode and isis authentication-mode.

Examples

# Specify the routing domain authentication mode as simple and password as 123456.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] domain-authentication-mode simple 123456

fast-reroute

Syntax

fast-reroute { auto | route-policy route-policy-name }

undo fast-reroute

View

IS-IS view

Default level

2: System level

Parameters

auto: Calculates a backup next hop automatically for all routes.

route-policy route-policy-name: References a routing policy to designate a next hop. The route-policy-name argument is a case-sensitive string of 1 to 63 characters. You can specify the backup next hop in the routing policy.

Description

Use fast-reroute to configure IS-IS fast reroute (FRR).

Use undo fast-reroute to restore the default.

By default, IS-IS FRR is disabled.

IMPORTANT:

· Do not use IS-IS FRR and BFD (for IS-IS) at the same time; otherwise, IS-IS FRR might fail to take effect.

· The automatic backup next hop calculation of IS-IS FRR and that of MPLS TE are mutually exclusive.

Example

# Enable IS-IS FRR to automatically calculate a backup next hop for all routes.

<Sysname> system-view

[Sysname] bfd echo-source-ip 1.1.1.1

[Sysname] isis

[Sysname-isis-1] fast-reroute auto

# Enable IS-IS FRR to designate a backup next hop by using a routing policy named frr.

<Sysname> system-view

[Sysname] bfd echo-source-ip 1.1.1.1

[Sysname] ip ip-prefix abc index 10 permit 100.1.1.0 24

[Sysname] route-policy frr permit node 10

[Sysname-route-policy] if-match ip-prefix abc

[Sysname-route-policy] apply fast-reroute backup-interface Vlan-interface 1000 backup-nexthop 193.1.1.8

[Sysname-route-policy] quit

[Sysname] isis 100

[Sysname-isis-100] fast-reroute route-policy frr

filter-policy export (IS-IS view)

Syntax

filter-policy { acl-number | ip-prefix ip-prefix-name | route-policy route-policy-name } export [ protocol [ process-id ] ]

undo filter-policy export [ protocol [ process-id ] ]

View

IS-IS view

Default level

2: System level

Parameters

acl-number: Specifies the number of an ACL that is used to filter redistributed routes. The value range is 2000 to 3999. For ACL configuration information, see ACL and QoS Command Reference.

ip-prefix ip-prefix-name: Specifies the name of an IP prefix list that is used to filter redistributed routes, a case-sensitive string of 1 to 19 characters. For IP prefix list configuration information, see "Routing policy configuration commands."

route-policy route-policy-name: Specifies the name of a routing policy that is used to filter redistributed routes, a case-sensitive string of 1 to 63 characters. For routing policy configuration information, see "Routing policy configuration commands."

protocol: Filters routes redistributed from the routing protocol, which can be BGP, direct, IS-IS, OSPF, RIP, or static.

process-id: Specifies a process by its ID in the range of 1 to 65535. It is optional only when the protocol is IS-IS, OSPF, or RIP.

Description

Use filter-policy export to configure IS-IS to filter redistributed routes.

Use undo filter-policy export to disable IS-IS from filtering redistributed routes.

By default, IS-IS does not filter redistributed routes.

If you want to reference an advanced ACL (with a number from 3000 to 3999) in the command or in the routing policy, the ACL should be configured with the rule [ rule-id ] { deny | permit } ip source sour-addr sour-wildcard command to deny/permit a route with the specified destination, or with the rule [ rule-id ] { deny | permit } ip source sour-addr sour-wildcard destination dest-addr dest-wildcard command to deny/permit a route with the specified destination and mask. The source keyword specifies the destination address of a route while the destination keyword specifies the subnet mask of the route (the subnet mask must be valid; otherwise, the configuration is ineffective).

Related commands: filter-policy import.

Examples

# Reference ACL 2000 to filter redistributed routes.

<Sysname> system-view

[Sysname] acl number 2000

[Sysname-acl-basic-2000] rule deny ip source 192.168.10.0 0.0.0.255

[Sysname-acl-basic-2000] quit

[Sysname] isis 1

[Sysname-isis-1] filter-policy 2000 export

# Configure ACL 3000 to permit only route 113.0.0.0/16 to pass, and reference ACL 3000 to filter the redistributed routes.

<Sysname> system-view

[Sysname] acl number 3000

[Sysname-acl-adv-3000] rule 10 permit ip source 113.0.0.0 0 destination 255.255.0.0 0

[Sysname-acl-adv-3000] rule 100 deny ip

[Sysname-acl-adv-3000] quit

[Sysname] isis 1

[Sysname-isis 1] filter-policy 3000 export

filter-policy import (IS-IS view)

Syntax

filter-policy { acl-number | ip-prefix ip-prefix-name | route-policy route-policy-name } import

undo filter-policy import

View

IS-IS view

Default level

2: System level

Parameters

acl-number: Specifies the number of an ACL that is used to filter routes calculated from received LSPs. The value range is 2000 to 3999. For ACL configuration information, see ACL and QoS Command Reference.

ip-prefix ip-prefix-name: Specifies the name of an IP prefix list that is used to filter routes calculated from received LSPs, a case-sensitive string of 1 to 19 characters. For IP prefix list configuration information, see "Routing policy configuration commands."

route-policy route-policy-name: Specifies the name of a routing policy that is used to filter routes calculated from received LSPs, a case-sensitive string of 1 to 63 characters. For routing policy configuration information, see "Routing policy configuration commands."

Description

Use filter-policy import to configure IS-IS to filter routes calculated from received LSPs.

Use undo filter-policy import to disable IS-IS from filtering routes calculated from received LSPs.

By default, IS-IS does not filter routes calculated from received LSPs.

Related commands: filter-policy export.

Examples

# Reference ACL 2000 to filter routes calculated from received LSPs.

<Sysname> system-view

[Sysname] acl number 2000

[Sysname-acl-basic-2000] rule deny ip source 192.168.10.0 0.0.0.255

[Sysname-acl-basic-2000] quit

[Sysname] isis 1

[Sysname-isis-1] filter-policy 2000 import

# Configure ACL 3000 to permit only route 113.0.0.0/16 to pass, and reference ACL 3000 to filter the routes calculated from received LSPs.

<Sysname> system-view

[Sysname] acl number 3000

[Sysname-acl-adv-3000] rule 10 permit ip source 113.0.0.0 0 destination 255.255.0.0 0

[Sysname-acl-adv-3000] rule 100 deny ip

[Sysname-acl-adv-3000] quit

[Sysname] isis 1

[Sysname-isis 1] filter-policy 3000 import

flash-flood

Syntax

flash-flood [ flood-count flooding-count | max-timer-interval flooding-interval | [ level-1 | level-2 ] ] *

undo flash-flood [ level-1 | level-2 ]

View

IS-IS view

Default level

2: System level

Parameters

flood-count flooding-count: Specifies the maximum number of LSPs to be flooded before the next SPF calculation. The value range is 1 to 15, and the default is 5.

max-timer-interval flooding-interval: Specifies the delay of the flash flooding, in the range of 10 to 50000 milliseconds. The default is 10.

level-1: Enables flash flooding for level-1.

level-2: Enables fast-flooding for level-2.

Description

Use flash-flood to enable IS-IS LSP flash flooding.

Use undo flash-flood to disable IS-IS LSP flash flooding.

By default, IS-IS LSP flash flooding is disabled.

If no level is specified, the command enables IS-IS LSP flash flooding for both Level-1 and Level-2.

Examples

# Enable fast flooding and specify the maximum LSPs to be sent as 10 and the delay time as 100 milliseconds.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] flash-flood flood-count 10 max-timer-interval 100

graceful-restart (IS-IS view)

Syntax

graceful-restart

undo graceful-restart

View

IS-IS view

Default level

2: System level

Parameters

None

Description

Use graceful-restart to enable IS-IS Graceful Restart capability.

Use undo graceful-restart to disable IS-IS Graceful Restart capability.

By default, IS-IS Graceful Restart capability is disabled.

The IS-IS GR and IS-IS non-stop routing (NSR) features are mutually exclusive. That is, the graceful-restart and non-stop-routing commands cannot be configured at the same time.

Before performing a master/backup switchover between IRF member switches, you must configure the irf mac-address persistent always command to prevent bridge MAC address changes that can cause IS-IS GR failure after the switchover.

Examples

# Enable the Graceful Restart capability for IS-IS process 1.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] graceful-restart

graceful-restart interval (IS-IS view)

Syntax

graceful-restart interval interval-value

undo graceful-restart interval

View

IS-IS view

Default level

2: System level

Parameters

interval-value: Specifies the Graceful Restart interval in the range of 30 to 1800 seconds.

Description

Use graceful-restart interval to configure the Graceful Restart interval.

Use undo graceful-restart interval to restore the default Graceful Restart interval.

By default, the Graceful Restart interval is 300 seconds.

Examples

# Configure the Graceful Restart interval for IS-IS process 1 as 120 seconds.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] graceful-restart interval 120

graceful-restart suppress-sa

Syntax

graceful-restart suppress-sa

undo graceful-restart suppress-sa

View

IS-IS view

Default level

2: System level

Parameters

None

Description

Use graceful-restart suppress-sa to suppress the SA (Suppress-Advertisement) bit during restart.

Use undo graceful-restart suppress-sa to set the SA bit.

By default, the SA bit is set during restart.

Suppressing the SA bit is mainly for avoiding black hole routing. If a router starts or reboots without keeping the local forwarding table, the router will discard incoming packets, causing black hole routing. To avoid this, you can set the SA bit of hello packets sent by the GR restarter to 1. Upon receiving such hello packets, the GR helpers will not advertise the GR restarter through LSPs.

Examples

# Suppress the SA bit during Graceful Restart.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] graceful-restart suppress-sa

import-route (IS-IS view)

Syntax

import-route protocol [ process-id | all-processes | allow-ibgp ] [ cost cost | cost-type { external | internal } | [ level-1 | level-1-2 | level-2 ] | route-policy route-policy-name | tag tag ] *

undo import-route protocol [ process-id | all-processes ]

View

IS-IS view

Default level

2: System level

Parameters

topology-name: Specifies a topology by its name, a case-sensitive character string of 1 to 31 characters.

protocol: Redistributes routes from a routing protocol, which can be BGP, direct, IS-IS, OSPF, RIP, or static.

process-id: Specifies a process by its ID in the range of 1 to 65535. It is available only when the protocol is IS-IS, OSPF, or RIP.

all-processes: Redistributes routes from all the processes of the specified routing protocol. This keyword takes effect only when the protocol is rip, ospf, or isis.

allow-ibgp: Allows redistribution of IBGP routes. It is available when the protocol is BGP.

cost: Specifies a cost for redistributed routes.

The range of the cost depends on its style:

· For the styles of narrow, narrow-compatible and compatible, the cost is in the range of 0 to 63.

· For the styles of wide, wide-compatible, the cost is in the range of 0 to 4261412864.

cost-type { external | internal }: Specifies the cost type. The internal type indicates internal routes, and the external type indicates external routes. If external is specified, the cost of a redistributed route to be advertised is added by 64 to make internal routes take priority over external routes. The type is external by default. The keywords are available only when the cost type is narrow, narrow-compatible or compatible.

level-1: Redistributes routes into the Level-1 routing table.

level-1-2: Redistributes routes into both Level-1 and Level-2 routing tables.

level-2: Redistributes routes into the Level-2 routing table. If no level is specified, routes will be redistributed into the Level-2 routing table by default.

route-policy route-policy-name: Redistributes only routes matching the criteria of a routing policy, the name of which is a case-sensitive string of 1 to 63 characters.

tag tag: Specifies a tag value for redistributed routes from 1 to 4294967295.

Description

Use import-route to redistribute routes from another routing protocol or another IS-IS process.

Use undo import-route to disable route redistribution from another routing protocol or another IS-IS process.

By default, no route redistribution is configured.

IS-IS takes all the redistributed routes as external routes to destinations outside the IS-IS routing domain.

Related commands: import-route isis level-2 into level-1.

Using the import-route bgp command redistributes only EBGP routes. Using the import-route bgp allow-ibgp command redistributes both EBGP and IBGP routes, but this might cause routing loops; thus, be cautious when using this command.

Only active routes can be redistributed. You can use the display ip routing-table protocol command to display route state information.

The undo import-route protocol all-processes command removes only the configuration made by the import-route protocol all-processes command, instead of the configuration made by the import-route protocol process-id command.

Examples

# Redistribute static routes and set the cost to 15.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] import-route static cost 15

import-route isis level-2 into level-1

Syntax

import-route isis level-2 into level-1 [ filter-policy { acl-number | ip-prefix ip-prefix-name | route-policy route-policy-name } | tag tag ] *

undo import-route isis level-2 into level-1

View

IS-IS view

Default level

2: System level

Parameters

acl-number: Specifies the number of an ACL that is used to filter routes from Level-2 to Level-1. The value range is 2000 to 3999. For ACL configuration information, see ACL and QoS Command Reference.

ip-prefix ip-prefix-name: Specifies the name of an IP prefix list that is used to filter routes from Level-2 to Level-1, a case-sensitive string of 1 to 19 characters. For IP prefix list configuration information, see "Routing policy configuration commands."

route-policy route-policy-name: Specifies the name of a routing policy that is used to filter routes from Level-2 to Level-1, a case-sensitive string of 1 to 63 characters. For routing policy configuration information, see "Routing policy configuration commands."

tag tag: Specifies a tag value from 1 to 4294967295 for redistributed routes.

Description

Use import-route isis level-2 into level-1 to enable route leaking from Level-2 to Level-1.

Use undo import-route isis level-2 into level-1 to disable routing leaking.

By default, no route leaking is configured.

You can specify a routing policy in the import-route isis level-2 into level-1 command to filter routes from Level-2 to Level-1. Other routing policies specified for route reception and redistribution does not affect the route leaking.

If a filter policy is configured, only routes passing it can be advertised into the Level-1 area.

Related commands: import-route.

Examples

# Enable route leaking from Level-2 to Level-1.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] import-route isis level-2 into level-1

import-route limit (IS-IS view)

Syntax

import-route limit number

undo import-route limit

View

IS-IS view

Default level

2: System level

Parameters

number: Specifies the maximum number of redistributed Level 1/Level 2 IPv4 routes, in the range of 1 to 262144.

Description

Use import-route limit to configure the maximum number of redistributed Level 1/Level 2 IPv4 routes.

Use undo import-route limit to restore the default.

Examples

# Configure IS-IS process 1 to redistribute up to 1000 Level 1/Level 2 IPv4 routes.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] import-route limit 1000

isis

Syntax

isis [ process-id ] [ vpn-instance vpn-instance-name ]

undo isis [ process-id ]

View

System view

Default level

2: System level

Parameters

process-id: Specifies an IS-IS process by its ID in the range of 1 to 65535. The default is 1.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS process belongs to the public network.

Description

Use isis to enable an IS-IS process and specify an associated VPN instance and/or enter IS-IS view.

Use undo isis to disable an IS-IS process.

Related commands: isis enable and network-entity.

Examples

# Enable IS-IS routing process 1, with the system ID being 0000.0000.0002, and area ID being 01.0001.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] network-entity 01.0001.0000.0000.0002.00

isis authentication-mode

Syntax

isis authentication-mode { md5 | simple } [ cipher ] password [ level-1 | level-2 ] [ ip | osi ]

undo isis authentication-mode { md5 | simple } [ cipher ] password [ level-1 | level-2 ]

View

Interface view

Default level

2: System level

Parameters

md5: Specifies the MD5 authentication mode.

simple: Specifies the simple authentication mode.

cipher: Sets a ciphertext password. If this keyword is not specified, you set a plaintext password.

password: Sets the password. This argument is case sensitive. It must be a plaintext string of 1 to 16 characters, or a ciphertext string of 33 to 53 characters.

level-1: Configures the password for Level-1.

level-2: Configures the password for Level-2.

ip: Checks IP related fields in LSPs and SNPs.

osi: Checks OSI related fields in LSPs and SNPs.

NOTE:

· This command is not available in loopback interface view.

· Whether a password should use ip or osi is not affected by the actual network environment.

Description

Use isis authentication-mode to set the IS-IS authentication mode and password for an interface.

Use undo isis authentication-mode to restore the default.

By default, no neighbor relationship authentication is configured.

The password in the specified mode is inserted into all outgoing hello packets and is used for authenticating the incoming hello packets. Only the authentication succeeds can the neighbor relationship be formed.

For two routers to become neighbors, the same authentication mode and password must be specified at both ends.

If you configure a password without specifying a level, the password applies to both Level-1 and Level-2,

If neither ip nor osi is specified, the OSI related fields in LSPs are checked.

The level-1 and level-2 keywords are available only on the Ethernet interfaces with IS-IS enabled with the isis enable command.

Related commands: area-authentication-mode and domain authentication-mode.

Examples

# On VLAN-interface 10, configure the authentication mode as simple, and set the plaintext password to 123456.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis authentication-mode simple 123456 level-1

isis bfd enable

Syntax

isis bfd enable

undo isis bfd enable

View

Interface view

Default level

2: System level

Parameters

None

Description

Use isis bfd enable to enable BFD on an IS-IS interface for link failure detection.

Use undo isis bfd enable to disable BFD on an IS-IS interface.

By default, an IS-IS interface is not enabled with BFD.

Examples

# Enable BFD for IS-IS on VLAN-interface 11.

<Sysname> system-view

[Sysname] interface vlan-interface 11

[Sysname-Vlan-interface11] isis enable

[Sysname-Vlan-interface11] isis bfd enable

isis circuit-level

Syntax

isis circuit-level [ level-1 | level-1-2 | level-2 ]

undo isis circuit-level

View

Interface view

Default level

2: System level

Parameters

level-1: Sets the circuit level to Level-1.

level-1-2: Sets the circuit level to Level-1-2.

level-2: Sets the circuit level to Level-2.

Description

Use isis circuit-level to set the circuit level for the interface.

Use undo isis circuit-level to restore the default.

By default, an interface can establish either the Level-1 or Level-2 adjacency.

For a Level-1 (Level-2) router, the circuit level can only be Level-1 (Level-2). For a Level-1-2 router, you need to specify a circuit level for a specific interface to form only the specified level neighbor relationship.

Related commands: is-level.

Examples

# VLAN-interface 10 is connected to a non backbone router in the same area. Configure the circuit level of VLAN-interface 10 as Level-1 to prevent sending and receiving Level-2 Hello packets.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis enable

[Sysname-Vlan-interface10] isis circuit-level level-1

isis circuit-type p2p

Syntax

isis circuit-type p2p

undo isis circuit-type

View

Interface view

Default level

2: System level

Parameters

None

Description

Use isis circuit-type p2p to configure the network type for an interface as P2P.

Use undo isis circuit-type to cancel the configuration.

By default, the network type of an interface depends on the physical media. (The network type of a VLAN interface is broadcast.)

Interfaces with different network types operate differently. For example, broadcast interfaces on a network need to elect a DIS and flood CSNP packets to synchronize the LSDBs, while P2P interfaces on a network need not elect a DIS and have a different LSDP synchronization mechanism.

If there are only two routers on a broadcast network, you can configure the network type of attached interfaces as P2P to avoid DIS election and CSNP flooding, saving network bandwidth and speeding up network convergence.

You can perform this configuration only for a broadcast network with only two attached routers.

NOTE:

This command is not available in loopback interface view.

Examples

# Configure the network type of VLAN-interface 10 as P2P.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis enable

[Sysname-Vlan-interface10] isis circuit-type p2p

isis cost

Syntax

isis [ ipv6-unicast ] cost value [ level-1 | level-2 ]

undo isis [ ipv6-unicast ] cost [ value ] [ level-1 | level-2 ]

View

Interface view

Default level

2: System level

Parameters

ipv6-unicast: Specifies an IPv6 unicast topology.

value: Specifies an IS-IS cost for the interface. The cost range differs with cost styles:

· For cost styles narrow, narrow-compatible and compatible, the cost is in the range of 1 to 63.

· For cost styles wide and wide-compatible, the cost is in the range of 1 to 16777215.

level-1: Applies the cost to Level-1.

level-2: Applies the cost to Level-2.

Description

Use isis cost to set the IS-IS cost of an interface.

Use undo isis cost to restore the default.

No cost is configured by default.

If neither level-1 nor level-2 is included, the cost applies to both level-1 and level-2.

Configure a proper IS-IS cost for each interface to guarantee correct route calculation.

Relate command: circuit-cost.

Examples

# Configure the Level-2 IS-IS cost as 5 for VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis cost 5 level-2

isis dis-name

Syntax

isis dis-name symbolic-name

undo isis dis-name

View

Interface view

Default level

2: System level

Parameters

symbolic-name: Specifies a DIS name, a string of 1 to 64 characters.

Description

Use isis dis-name to configure a name for a DIS to represent the pseudo node on a broadcast network.

Use undo isis dis-name to remove the configuration.

By default, no name is configured for the DIS.

This command takes effect only on a switch that must have dynamic system ID to host name mapping enabled. This command is not supported on a Point-to-Point interface.

NOTE:

This command is not available in loopback interface view.

Examples

# Configure the DIS name as LOCALAREA.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis dis-name LOCALAREA

isis dis-priority

Syntax

isis dis-priority value [ level-1 | level-2 ]

undo isis dis-priority [ value ] [ level-1 | level-2 ]

View

Interface view

Default level

2: System level

Parameters

value: Specifies a DIS priority for the interface, in the range of 0 to 127.

level-1: Applies the DIS priority to Level-1.

level-2: Applies the DIS priority to Level-2.

Description

Use isis dis-priority to specify a DIS priority at a specified level for an interface.

Use undo isis dis-priority to restore the default priority of 64 for Level-1 and Level-2.

If neither level-1 nor level-2 is specified in this command, the DIS priority applies to both Level-1 and Level-2.

On an IS-IS broadcast network, a router should be elected as the DIS at each routing level. You can specify a DIS priority at a level for an interface. The greater the interface's priority is, the more likelihood it becomes the DIS. If multiple routers in the broadcast network have the same highest DIS priority, the router with the highest SNPA (Subnetwork Point of Attachment) address (SNPA addresses are MAC addresses on a broadcast network) becomes the DIS.

There is no backup DIS in IS-IS and the router with a priority of 0 can also participate in DIS election.

NOTE:

This command is not available in loopback interface view.

Examples

# Configure the Level-2 DIS priority as 127 for VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis dis-priority 127 level-2

isis enable

Syntax

isis enable [ process-id ]

undo isis enable

View

Interface view

Default level

2: System level

Parameters

process-id: Specifies an IS-IS process by its ID in the range of 1 to 65535. The default is 1.

Description

Use isis enable to enable an IS-IS process on the interface.

Use undo isis enable to disable IS-IS.

By default, no IS-IS routing process is enabled on an interface.

Related commands: isis and network-entity.

Examples

# Create IS-IS routing process 1, and enable the IS-IS routing process on VLAN-interface 10.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] network-entity 10.0001.1010.1020.1030.00

[Sysname-isis-1] quit

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis enable 1

isis mesh-group

Syntax

isis mesh-group { mesh-group-number | mesh-blocked }

undo isis mesh-group

View

Interface view

Default level

2: System level

Parameters

mesh-group-number: Specifies a mesh group by its number in the range of 1 to 4294967295.

mesh-blocked: Blocks the interface, which sends LSPs only after receiving LSP requests.

Description

Use isis mesh-group to add the interface into a specified mesh group or block the interface.

Use undo isis mesh-group to restore the default.

By default, an interface does not belong to any mesh group.

For an interface not in a mesh group, it follows the normal process to flood the received LSPs to other interfaces. For the NBMA network with high connectivity and multiple point-to-point links, this will cause repeated LSP flooding and bandwidth waste.

After an interface is added to a mesh group, it will only flood a received LSP or a generated LSP to interfaces not belonging to the same mesh group.

If you block an interface, the interface can send LSPs only after receiving LSP requests.

NOTE:

· The mesh-group feature is only available for a point-to-point link interface.

· This command is not available in loopback interface view.

Examples

# Add interface VLAN-interface 1000 to mesh-group 3.

<Sysname> system-view

[Sysname] interface Vlan-interface 1000

[Sysname-Vlan-interface1000] isis mesh-group 3

isis mib-binding

Syntax

isis mib-binding process-id

undo isis mib-binding

View

System view

Default level

2: System level

Parameters

process-id: Specifies an IS-IS process by its ID in the range of 1 to 65535.

Description

Use isis mib-binding to bind MIBs with an IS-IS process.

Use undo isis mib-binding to restore the default.

By default, MIBs are bound with IS-IS process 1.

Examples

# Bind MIBs with IS-IS process 100.

<Sysname> system-view

[Sysname] isis mib-binding 100

isis silent

Syntax

isis silent

undo isis silent

View

Interface view

Default level

2: System level

Parameters

None

Description

Use isis silent to disable the interface from sending and receiving IS-IS packets.

Use undo isis silent to restore the default.

By default, an interface is not disabled from sending and receiving IS-IS packets.

NOTE:

The feature is not supported on the loopback interface.

Examples

# Disable VLAN-interface 10 from sending and receiving IS-IS packets.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis silent

isis small-hello

Syntax

isis small-hello

undo isis small-hello

View

Interface view

Default level

2: System level

Parameters

None

Description

Use isis small-hello to configure the interface to send small hello packets without CLVs.

Use undo isis small-hello to restore the default.

By default, an interface sends standard hello packets.

NOTE:

This command is not available in loopback interface view.

Examples

# Configure VLAN-interface 10 to send small Hello packets.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis small-hello

isis timer csnp

Syntax

isis timer csnp seconds [ level-1 | level-2 ]

undo isis timer csnp [ seconds ] [ level-1 | level-2 ]

View

Interface view

Default level

2: System level

Parameters

seconds: Specifies on the DIS of a broadcast network the interval in seconds for sending CSNP packets. The value range is 1 to 600.

level-1: Applies the interval to Level-1.

level-2: Applies the interval to Level-2.

Description

Use isis timer csnp to specify on the DIS of a broadcast network the interval for sending CSNP packets.

Use undo isis timer csnp to restore the default.

The default CSNP interval is 10 seconds.

If no level is specified, the CSNP interval applies to both Level-1 and Level-2.

This command only applies to the DIS of a broadcast network, which sends CSNP packets periodically for LSDB synchronization.

NOTE:

This command is not available in loopback interface view.

Examples

# Configure Level-2 CSNP packets to be sent every 15 seconds over VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis timer csnp 15 level-2

isis timer hello

Syntax

isis timer hello seconds [ level-1 | level-2 ]

undo isis timer hello [ seconds ] [ level-1 | level-2 ]

View

Interface view

Default level

2: System level

Parameters

seconds: Specifies the interval in seconds for sending hello packets. The value range is 3 to 255.

level-1: Specifies the interval for sending Level-1 hello packets.

level-2: Specifies the interval for sending Level-2 hello packets.

Description

Use isis timer hello to specify the interval for sending hello packets.

Use undo isis timer hello to restore the default.

The default hello interval is 10 seconds.

Level-1 and Level-2 hello packets are sent independently on a broadcast network, so you must specify an interval for each level. On a P2P link, Level-1 and Level-2 packets are both sent in P2P hello packets, and you need not specify an interval for each level.

You can configure keywords level-1 and level-2 only on broadcast interfaces. Before doing that, you must enable IS-IS on the interface.

As the shorter the interval is, the more system resources will be occupied, configure a proper interval as needed.

If no level is specified, the hello interval applies to both Level-1 and Level-2.

NOTE:

This command is not supported in loopback interface view.

Related commands: isis timer holding-multiplier.

Examples

# Configure Level-2 hello packets to be sent every 20 seconds over VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis timer hello 20 level-2

isis timer holding-multiplier

Syntax

isis timer holding-multiplier value [ level-1 | level-2 ]

undo isis timer holding-multiplier [ value ] [ level-1 | level-2 ]

View

Interface view

Default level

2: System level

Parameters

value: Specifies the number of hello intervals, in the range of 3 to 1000.

level-1: Applies the number to the Level-1 IS-IS neighbor.

level-2: Applies the number to the Level-2 IS-IS neighbor.

Description

Use isis timer holding-multiplier to specify the IS-IS hello multiplier.

Use undo isis timer holding-multiplier to restore the default.

The default IS-IS hello multiplier is 3.

With the IS-IS hello multiplier configured, a router can uses hello packets to notify its neighbor router of the adjacency hold time (hello multiplier times hello interval). If the neighbor router receives no hello packets from this router within the hold time, it declares the adjacency down. You can adjust the adjacency hold time by changing the hello multiplier or the hello interval on an interface.

Level-1 and Level-2 hello packets are sent independently on a broadcast network, so you need to specify a hello multiplier for each level. On a P2P link, Level-1 and Level-2 packets are both sent in P2P hello packets, and you need not specify Level-1 or Level-2.

You can configure keywords level-1 and level-2 only on broadcast interfaces. Before doing that, you must enable IS-IS on the interface.

If no level is specified, the hello multiplier applies to the current level.

NOTE:

This command is not available in loopback interface view.

Related commands: isis timer hello.

Examples

# Configure the hello multiplier as 6 for VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis timer holding-multiplier 6 level-2

isis timer lsp

Syntax

isis timer lsp time [ count count ]

undo isis timer lsp

View

Interface view

Default level

2: System level

Parameters

time: Specifies the minimum interval in milliseconds for sending link-state packets. The value range is 1 to 1000.

count: Specifies the maximum number of link-state packets to be sent at one time. The value range is 1 to 1000. The default is 5.

Description

Use isis timer lsp to configure the minimum interval for sending LSPs on the interface and specify the maximum LSPs that can be sent per time.

Use undo isis timer lsp to restore the default of 33 milliseconds.

Related commands: isis timer retransmit.

NOTE:

This command is not available in loopback interface view.

Examples

# Configure the interval as 500 milliseconds for sending LSPs on interface VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis timer lsp 500

isis timer retransmit

Syntax

isis timer retransmit seconds

undo isis timer retransmit

View

Interface view

Default level

2: System level

Parameters

seconds: Specifies the interval in seconds for retransmitting LSP packets. The value range is 1 to 300.

Description

Use isis timer retransmit to configure the interval for retransmitting LSP packets over a point-to-point link.

Use undo isis timer retransmit to restore the default.

By default, the retransmission interval is 5 seconds.

A P2P link requires a response to a sent LSP. If no response is received within the retransmission interval, the LSP is retransmitted.

You need not use this command over a broadcast link where CSNPs are broadcast periodically.

Configure a proper retransmission interval to avoid unnecessary retransmissions.

Perform this configuration only when the link layer protocol is PPP.

NOTE:

This command is not available in loopback interface view.

Related commands: isis timer lsp.

Examples

# Configure the LSP retransmission interval as 10 seconds for VLAN-interface 1000.

<Sysname> system-view

[Sysname] interface Vlan-interface 1000

[Sysname-Vlan-interface1000] isis timer retransmit 10

is-level

Syntax

is-level { level-1 | level-1-2 | level-2 }

undo is-level

View

IS-IS view

Default level

2: System level

Parameters

level-1: Configures the router to work on Level-1, which means it only calculates routes within the area, and maintains the L1 LSDB.

level-1-2: Configures the router to work on Level-1-2, which means it calculates routes and maintains the LSDBs for both L1 and L2.

level-2: Configures the router to work on Level-2, which means it calculates routes and maintains the LSDB for L2 only.

Description

Use is-level to specify the IS level.

Use undo is-level to restore the default.

The default IS level is level-1-2.

You can configure all the routers as either Level-1 or Level-2 if there is only one area, because there is no need for all routers to maintain two identical databases at the same time. If the only area is an IP network, configure all the routers as Level-2 for scalability.

Related commands: isis circuit-level.

Examples

# Configure the router to work in Level-1.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] is-level level-1

is-name

Syntax

is-name sys-name

undo is-name

View

IS-IS view

Default level

2: System level

Parameters

sys-name: Specifies a host name for the local IS, a string of 1 to 64 characters.

Description

Use is-name to specify a host name for the IS to enable dynamic system ID to hostname mapping.

Use undo is-name to disable dynamic system ID to hostname mapping.

Dynamic system ID to hostname mapping is not enabled by default.

Examples

# Configure a host name for the local IS.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] is-name RUTA

is-name map

Syntax

is-name map sys-id map-sys-name

undo is-name map sys-id

View

IS-IS view

Default level

2: System level

Parameters

sys-id: Specifies the system ID or pseudonode ID of a remote IS.

map-sys-name: Specifies a host name for the remote IS, a string of 1 to 64 characters.

Description

Use is-name map to configure a system ID to host name mapping for a remote IS.

Use undo is-name map to remove the mapping.

Each remote IS system ID corresponds to only one name.

Examples

# Map the host name RUTB to the system ID 0000.0000.0041 of the remote IS.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] is-name map 0000.0000.0041 RUTB

is-snmp-traps enable

Syntax

is-snmp-traps enable

undo is-snmp-traps

View

IS-IS view

Default level

2: System level

Parameters

None

Description

Use is-snmp-traps enable to enable the SNMP Trap function of IS-IS.

Use undo is-snmp-traps to disable this function.

By default, SNMP Trap is enabled.

Examples

# Enable SNMP Trap.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] is-snmp-traps enable

log-peer-change (IS-IS view)

Syntax

log-peer-change

undo log-peer-change

View

IS-IS view

Default level

2: System level

Parameters

None

Description

Use log-peer-change to enable the logging of IS-IS neighbor state changes.

Use undo log-peer-change to disable the logging.

By default, the logging is enabled.

After the logging is enabled, information about IS-IS adjacency state changes is sent to the configuration terminal.

Examples

# Enable logging on the IS-IS adjacency state changes.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] log-peer-change

lsp-fragments-extend

Syntax

lsp-fragments-extend [ [ level-1 | level-1-2 | level-2 ] | [ mode-1 | mode-2 ] ] *

undo lsp-fragments-extend

View

IS-IS view

Default level

2: System level

Parameters

level-1: Applies the fragment extension mode to Level-1 LSPs.

level-1-2: Applies the fragment extension mode to both Level-1 and Level-2 LSPs.

level-2: Applies the fragment extension mode to Level-2 LSPs.

mode-1: Specifies the fragment extension mode 1, used on a network where some routers do not support LSP fragment extension.

mode-2: Specifies the fragment extension mode 2, used on a network where all routers support LSP fragment extension.

Description

Use lsp-fragments–extend to enable an LSP fragment extension mode for a level.

Use undo lsp-fragments–extend to disable LSP fragment extension for a level.

By default, LSP fragment extension is disabled.

If no mode is specified, LSP fragment extension mode 1 is enabled.

If no level is specified, the LSP fragment extension mode is enabled for both Level-1 and Level-2.

Examples

# Enable LSP fragment extension mode 1 for Level-2.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] lsp-fragments-extend mode-1 level-2

lsp-length originate

Syntax

lsp-length originate size [ level-1 | level-2 ]

undo lsp-length originate [ level-1 | level-2 ]

View

IS-IS view

Default level

2: System level

Parameters

size: Specifies the maximum size in bytes of LSP packets. The value range is 512 to 16384.

level-1: Applies the size to Level-1 LSP packets.

level-2: Applies the size to Level-2 LSP packets.

Description

Use lsp-length originate to configure the maximum size of generated Level-1 or Level-2 LSPs.

Use undo lsp-length originate to restore the default.

By default, the maximum size of generated Level-1 and Level-2 LSPs is 1497 bytes.

If neither Level-1 nor Level-2 is specified in the command, the configured maximum size applies to the current IS-IS level.

Examples

# Configure the maximum size of the generated Level-2 LSPs as 1024 bytes.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] lsp-length originate 1024 level-2

lsp-length receive

Syntax

lsp-length receive size

undo lsp-length receive

View

IS-IS view

Default level

2: System level

Parameters

size: Specifies the maximum size of received LSPs, in the range of 512 to 16384 bytes.

Description

Use lsp-length receive to configure the maximum size of received LSPs.

Use undo lsp-length receive to restore the default.

By default, the maximum size of received LSPs is 1497 bytes.

Examples

# Configure the maximum size of received LSPs.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] lsp-length receive 1024

maximum load-balancing (IS-IS view)

Syntax

maximum load-balancing number

undo maximum load-balancing

View

IS-IS view

Default level

2: System level

Parameters

number: Specifies the maximum number of ECMP routes, in the range of 1 to 32.

Description

Use maximum load-balancing to configure the maximum number of equal-cost multi-path (ECMP) routes.

Use undo maximum load-balancing to restore the default.

By default, the maximum number of ECMP routes is 32.

Examples

# Configure the maximum number of ECMP routes as 2.

<Sysname> system-view

[Sysname] isis 100

[Sysname-isis-100] maximum load-balancing 2

# Restore the default.

[Sysname-isis-100] undo maximum load-balancing

network-entity

Syntax

network-entity net

undo network-entity net

View

IS-IS view

Default level

2: System level

Parameters

net: Specifies a Network Entity Title (NET) in the format of X…X.XXXX....XXXX.00 in hexadecimal notation, with the first part X…X being the area address, the middle part XXXX....XXXX (a total of 12 "X") being the router's system ID and the last part 00 being SEL.

Description

Use network-entity to configure the Network Entity Title for an IS-IS routing process.

Use undo network-entity to delete a NET.

By default, no NET is configured.

A NET is a special NSAP address with the SEL being 0. The length of the NET is in the range of 8 bytes to 20 bytes.

A NET comprises the following parts:

· Area ID—Its length is in the range of 1 to 13 bytes.

· System ID—A system ID uniquely identifies a host or router in the area and has a fixed 6-byte length.

· SEL—It has a value of 0 and a fixed 1-byte length.

For example, a NET is ab.cdef.1234.5678.9abc.00, where area ID is ab.cdef, system ID is 1234.5678.9abc, and SEL is 00.

Related commands: isis and isis enable.

Examples

# Specify the NET as 10.0001.1010.1020.1030.00, of which 10.0001 is the area ID and 1010.1020.1030 is the system ID.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] network-entity 10.0001.1010.1020.1030.00

non-stop-routing

Syntax

non-stop-routing

undo non-stop-routing

View

IS-IS view

Default level

2: System level

Parameters

None

Description

Use non-stop-routing to enable IS-IS NSR.

Use undo non-stop-routing to disable IS-IS NSR.

By default, IS-IS NSR is disabled.

The IS-IS GR and IS-IS NSR features are mutual exclusive. That is, the non-stop-routing and graceful-restart commands cannot be configured at the same time.

Examples

# Enable NSR for IS-IS process 1.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] non-stop-routing

non-stop-routing interval

Syntax

non-stop-routing interval interval-value

undo non-stop-routing interval

View

IS-IS view

Default level

2: System view

Parameters

interval-value: Specifies the NSR interval in the range of 30 to 1800 seconds. The NSR interval refers to the expected interval of an active/standby main board switchover on a distributed switch.

Description

Use non-stop-routing interval to set the NSR interval.

Use undo non-stop-routing interval to restore the default.

By default, the NSR interval is 0 seconds, that is, no NSR interval is set.

If an NSR interval is set on a switch, a neighbor of the switch uses the larger value of the NSR interval and hold time of the switch as the hold time to ensure the neighbor relationship does not time out during an active/standby switchover on the switch.

If no NSR interval is configured on the switch, the hold time configured on a specific interface is used by the corresponding neighbor.

Examples

# Set the NSR interval to 40 seconds for IS-IS process 1.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] non-stop-routing

[Sysname-isis-1] non-stop-routing interval 40

preference (IS-IS view)

Syntax

preference { preference | route-policy route-policy-name } *

undo preference

View

IS-IS view

Default level

2: System level

Parameters

preference: Specifies the preference for IS-IS protocol, in the range of 1 to 255.

route-policy route-policy-name: Specifies a routing policy by its name, a case-sensitive string of 1 to 63 characters. The preference applies to routes passing the routing policy.

Description

Use preference to configure the preference for IS-IS.

Use undo preference to restore the default.

By default, IS-IS preference is 15.

If a routing policy is specified in this command, the preference (if any) set by the routing policy applies to those matched routes. Other routes use the preference set by the preference command.

When a router runs multiple routing protocols at the same time, the system will set a preference to each routing protocol. If several protocols find routes to the same destination, the route of the routing protocol with the highest preference is selected.

Examples

# Configure the preference of IS-IS protocol as 25.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] preference 25

priority high

Syntax

priority high { ip-prefix prefix-name | tag tag-value }

undo priority high [ ip-prefix | tag ]

View

IS-IS view

Default level

2: System level

Parameters

ip-prefix ip-prefix-name: Specifies the name of an IP prefix list, a case-sensitive string of 1 to 19 characters.

tag tag-value: Specifies a tag value in the range of 1 to 4294967295.

Description

Use priority high to assign a high priority to specific routes for faster network convergence.

Use undo priority high to restore the default.

By default, no IS-IS route is assigned a high priority.

If no IS-IS route is assigned a high priority, IS-IS host routes are processed first in network convergence because they have higher priority than other types of IS-IS routes.

Examples

# Assign a high priority to the IS-IS routes matching IP prefix list standtest.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] priority high ip-prefix standtest

reset isis all

Syntax

reset isis all [ process-id | vpn-instance vpn-instance-name ]

View

User view

Default level

2: System level

Parameters

process-id: Clears the data structure information of an IS-IS process numbered from 1 to 65535.

vpn-instance vpn-instance-name: Clears the data structure information of the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the data structure information of the public network is cleared.

Description

Use reset isis all to clear all IS-IS data structure information.

By default, no data structure information is cleared.

This command is used when the LSP needs to be updated immediately. For example, after performing the area-authentication-mode and domain-authentication-mode commands, you can use this command to clear old LSPs.

Related commands: area-authentication-mode and domain authentication-mode.

Examples

# Clear all IS-IS data structure information.

<Sysname> reset isis all

reset isis peer

Syntax

reset isis peer system-id [ process-id | vpn-instance vpn-instance-name ]

View

User view

Default level

2: System level

Parameters

system-id: Specifies the system ID of an IS-IS neighbor.

process-id: Clears the data structure information of an IS-IS process with an ID from 1 to 65535.

Description

Use reset isis peer to clear the data structure information of a specified IS-IS neighbor.

This command is used when you need to re-establish an IS-IS neighbor relationship.

Examples

# Clear the data structure information of the neighbor with the system ID 0000.0c11.1111.

<Sysname> reset isis peer 0000.0c11.1111

set-overload

Syntax

set-overload [ on-startup [ [ start-from-nbr system-id [ timeout1 [ nbr-timeout ] ] ] | timeout2 ] [ allow { external | interlevel } * ]

undo set-overload

View

IS-IS view

Default level

2: System level

Parameters

on-startup: Sets the overload bit upon system startup.

start-from-nbr system-id [ timeout1 [ nbr-timeout ] ]: Starts the nbr-timeout timer when the router begins to establish the neighbor relationship with the neighbor after system startup. If the neighbor relationship is formed within the nbr-timeout interval, IS-IS keeps the overload bit set; if not, the bit is cleared. IS-IS keeps the overload bit set within the timeout1 interval after the neighbor relationship is formed within the nbr-timeout interval.

· system-id: Specifies the neighbor.

· timeout1: The timeout1 interval is in the range of 5 to 86400 seconds and defaults to 600 seconds.

· nbr-timeout: The timer has an interval from 5 to 86400 seconds. The default is 1200 seconds.

timeout2: Sets the overload bit within the timeout2 interval after system startup. The interval is in the range of 5 to 86400 seconds and defaults to 600 seconds.

allow: Allows advertising address prefixes. By default, no address prefixes are allowed to be advertised when the overload bit is set.

external: Allows advertising IP address prefixes redistributed from other routing protocols with the allow keyword specified.

interlevel: Allows advertising IP address prefixes learnt from different IS-IS levels with the allow keyword specified.

Description

Use set-overload to configure the overload bit.

Use undo set-overload to clear the overload bit.

By default, no overload bit is configured.

If the on-startup keyword is not specified, the command sets the overload bit immediately until the undo set-overload command is executed.

If the on-startup keyword is specified, IS-IS sets the overload bit upon system startup and keeps it set within the timeout2 interval.

Examples

# Configure overload bit on the current router.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] set-overload

summary (IS-IS view)

Syntax

summary ip-address { mask | mask-length } [ avoid-feedback | generate_null0_route | [ level-1 | level-1-2 | level-2 ] | tag tag ] *

undo summary ip-address { mask | mask-length } [ level-1 | level-1-2 | level-2 ]

View

IS-IS view

Default level

2: System level

Parameters

ip-address: Specifies the destination IP address of the summary route.

mask: Specifies the mask of the destination IP address, in dotted decimal notation.

mask-length: Specifies the mask length in the range of 0 to 32.

avoid-feedback: Avoids learning summary routes by route calculation.

generate_null0_route: Generates the Null 0 route to avoid routing loops.

level-1: Summarizes only the routes redistributed to Level-1.

level-1-2: Summarizes the routes redistributed to both Level-1 and Level-2.

level-2: Summarizes only the routes redistributed to Level-2.

tag tag: Specifies a management tag in the range of 1 to 4294967295.

Description

Use summary to configure a summary route.

Use undo summary to remove a summary route.

By default, no summarization is configured.

If no level is specified, only the level-2 routes will be summarized by default.

You can summarize multiple contiguous networks into a single network to reduce the size of the routing table, as well as that of LSP and LSDB generated by the router. It is allowed to summarize native IS-IS routes and redistributed routes. After summarization, the cost of the summary route is the smallest cost of those summarized routes.

The router summarizes only routes in local LSPs.

Examples

# Configure a summary route of 202.0.0.0/8.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] summary 202.0.0.0 255.0.0.0

timer lsp-generation

Syntax

timer lsp-generation maximum-interval [ initial-interval [ second-wait-interval ] ] [ level-1 | level-2 ]

undo timer lsp-generation [ level-1 | level-2 ]

View

IS-IS view

Default level

2: System level

Parameters

maximum-interval: Specifies the maximum wait interval in seconds for generating IS-IS LSPs. The value range is 1 to 120.

initial-interval: Specifies the initial wait interval in milliseconds before generating the first IS-IS LSP. The value range is 10 to 60000, and the default is 0.

second-wait-interval: Specifies the wait interval in milliseconds before generating the second LSP. The value range is 10 to 60000, and the default is 0.

level-1: Applies the intervals to Level-1.

level-2: Applies the intervals to Level-2 .If no level is specified, the specified intervals apply to both Level-1 and Level-2.

Description

Use timer lsp-generation to specify the wait interval before generating IS-IS LSPs.

Use undo timer lsp-generation to restore the default.

By default, the wait interval before LSP generation is 2 seconds.

If only the maximum interval is specified, IS-IS waits the maximum interval before generating an LSP.

If both the maximum and initial intervals are specified, the following happens:

· IS-IS waits the initial interval before generating the first LSP.

· If the network topology is unstable, that is, triggers occur at intervals shorter than the maximum interval, IS-IS waits the maximum interval before generating the first LSP until the network topology is stable.

If the maximum, initial, and second wait intervals are specified, the following happens:

· IS-IS waits the initial interval before generating the first LSP.

· If the network topology is unstable, that is, triggers occur at intervals shorter than the maximum interval, IS-IS waits the second-wait-interval before generating the second LSP and penalty is applied on the wait interval before generating the next LSP. That is, for each subsequent trigger, the wait interval before generating the LSP will be twice the previous wait interval until the maximum interval is reached.

· After the network topology is stable; that is, triggers occur at intervals greater than the maximum interval, the wait interval before generating LSPs is restored to the initial interval.

Examples

# Set the maximum, initial, and second wait intervals to 10 seconds, 100 milliseconds and 200 milliseconds.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1]timer lsp-generation 10 100 200

timer lsp-max-age

Syntax

timer lsp-max-age seconds

undo timer lsp-max-age

View

IS-IS view

Default level

2: System level

Parameters

seconds: Specifies the LSP maximum aging time in seconds, in the range of 1 to 65535.

Description

Use timer lsp-max-age to set the LSP maximum age in the LSDB.

Use undo timer lsp-max-age to restore the default.

The default LSP maximum age is 1200 seconds.

Related commands: timer lsp-refresh.

Examples

# Set the maximum LSP age to 1500 seconds.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] timer lsp-max-age 1500

timer lsp-refresh

Syntax

timer lsp-refresh seconds

undo timer lsp-refresh

View

IS-IS view

Default level

2: System level

Parameters

seconds: Specifies the LSP refresh interval in seconds, in the range of 1 to 65534.

Description

Use timer lsp-refresh to set the LSP refresh interval.

Use undo timer lsp-refresh to restore the default.

The default LSP refresh interval is 900 seconds.

Related commands: timer lsp-max-age.

IMPORTANT:

To refresh LSPs before they are aged out, the interval set by the timer lsp-refresh command must be smaller than that set by the timer lsp-max-age command.

Examples

# Set the LSP refresh interval to 1500 seconds.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] timer lsp-refresh 1500

timer spf

Syntax

timer spf maximum-interval [ initial-interval [ second-interval ] ]

undo timer spf

View

IS-IS view

Default level

2: System level

Parameters

maximum-interval: Specifies the maximum SPF calculation interval in the range of 1 to 120 seconds.

initial-interval: Specifies the wait interval before the first SPF calculation, in the range of 10 to 60000 milliseconds. The default is 0.

second-interval: Specifies the wait interval before the second SPF calculation, in the range of 10 to 60000 milliseconds. The default is 0.

Description

Use timer spf to set the SPF calculation interval.

Use undo timer spf to restore the default.

The default IS-IS SPF calculation interval is 10 seconds.

If only the maximum interval is specified, IS-IS waits the maximum interval before performing the SPF calculation.

If both the maximum and initial intervals are specified, the following happens:

· IS-IS waits the initial interval before performing the first SPF calculation.

· When SPF calculation triggers occur at intervals shorter than the maximum interval, the topology is considered unstable and IS-IS waits the maximum interval before performing the SPF calculation until the topology is stable.

If maximum-interval, initial-interval, and second-interval are specified, the following happens:

· IS-IS waits the initial interval before performing the first SPF calculation.

· When SPF calculation triggers occur at intervals shorter than the maximum interval, the topology is considered unstable, IS-IS will wait the second-interval before performing the second SPF calculation and penalty is applied on the wait interval for the next SPF calculation. That is, for each subsequent trigger, the wait interval before SPF calculation will be twice the previous wait interval until the maximum interval is reached.

· After the network topology becomes stable; that is, triggers occur at intervals greater than the maximum interval, the wait interval before SPF calculation is restored to the initial interval.

Examples

# Set the maximum SPF calculation interval to 10 seconds, the wait interval before the first SPF calculation to 100 milliseconds, and the wait interval before the second SPF calculation to 200 milliseconds.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] timer spf 10 100 200

virtual-system

Syntax

virtual-system virtual-system-id

undo virtual-system virtual-system-id

View

IS-IS view

Default level

2: System level

Parameters

virtual-system-id: Specifies the virtual system ID of the IS-IS process.

Description

Use virtual-system to configure a virtual system ID for the IS-IS process. Use undo virtual-system to remove a virtual system ID.

Up to 50 virtual system IDs can be configured for the IS-IS process.

Examples

# Configure a virtual system ID of 2222.2222.2222 for IS-IS process 1.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] virtual-system 2222.2222.2222

07-Layer 3 - IP Routing Command Reference

area-authentication-mode

domain-authentication-mode

fast-reroute

filter-policy export (IS-IS view)

filter-policy import (IS-IS view)

graceful-restart (IS-IS view)

graceful-restart interval (IS-IS view)

import-route (IS-IS view)

import-route isis level-2 into level-1

import-route limit (IS-IS view)

isis authentication-mode

isis bfd enable

isis circuit-type p2p

isis cost

isis enable

isis timer hello

isis timer holding-multiplier

isis timer lsp

isis timer retransmit

is-level

log-peer-change (IS-IS view)

lsp-length originate

maximum load-balancing (IS-IS view)

network-entity

preference (IS-IS view)

reset isis all

summary (IS-IS view)

timer lsp-max-age

timer lsp-refresh

virtual-system

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