04-Layer 3-IP Routing Command Reference

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08-IPv6 static routing commands
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08-IPv6 static routing commands 117.43 KB

IPv6 static routing commands

delete ipv6 static-routes all

Use delete ipv6 static-routes all to delete all IPv6 static routes.

Syntax

delete ipv6 [ vpn-instance vpn-instance-name ] static-routes all

Views

System view

Predefined user roles

network-admin

Parameters

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, the command deletes all IPv6 static routes for the public network.

Usage guidelines

When you use this command, the system will prompt you to confirm the operation before deleting all the IPv6 static routes.

Examples

# Delete all IPv6 static routes.

<Sysname> system-view

[Sysname] delete ipv6 static-routes all

This will erase all IPv6 static routes and their configurations, you must reconfigure all static routes.

Are you sure?[Y/N]:y

Related commands

ipv6 route-static

display ipv6 route-static nib

Use display ipv6 route-static nib to display IPv6 static route next hop information.

Syntax

display ipv6 route-static nib [ nib-id ] [ verbose ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

nib-id: Specifies a NIB by its ID, a hexadecimal string in the range of 1 to ffffffff.

verbose: Displays detailed IPv6 static route next hop information. If you do not specify this keyword, the command displays brief IPv6 static route next hop information.

Examples

# Display brief IPv6 static route next hop information.

<Sysname> display ipv6 route-static nib

Total number of nexthop(s): 35

 

      NibID: 0x21000000        Sequence: 0

       Type: 0x41               Flushed: Yes

   UserKey0: 0x0                VrfNthp: 0

   UserKey1: 0x0                Nexthop: 2::3

    IFIndex: 0x0              LocalAddr: ::

     NewUK0: 0x0                 NewUK1: 0x0

     NewUK2: 0x0                 NewUK3: 0x0

     NewUK4: 0x0                 NewUK5: 0x0

     NewUK6: 0x0                 NewUK7: 0x0

   TopoNthp: Invalid            ExtType: 0x0

      Color: 0                   COFlag: 0x0

   SIDIndex: 0x0

 

      NibID: 0x21000001        Sequence: 1

       Type: 0x41               Flushed: Yes

   UserKey0: 0x0                VrfNthp: 0

   UserKey1: 0x0                Nexthop: 3::4

    IFIndex: 0x0              LocalAddr: ::

     NewUK0: 0x0                 NewUK1: 0x0

     NewUK2: 0x0                 NewUK3: 0x0

     NewUK4: 0x0                 NewUK5: 0x0

     NewUK6: 0x0                 NewUK7: 0x0

   TopoNthp: Invalid            ExtType: 0x0

      Color: 0                   COFlag: 0x0

   SIDIndex: 0x0

 

...

Table 1 Command output

Field

Description

NibID

ID of the NIB.

Sequence

Sequence number of the NIB.

Type

Type of the NIB.

Flushed

Indicates whether the route with the NIB has been flushed to the FIB.

UserKey0

Reserved data 1.

UserKey1

Reserved data 2.

VrfNthp

Index of the VPN instance to which the next hop belongs. This field displays 0 if the next hop is on the public network.

Nexthop

Next hop address.

IFIndex

Interface index

LocalAddr

Local interface address.

NewUK0

New reserved data 1.

NewUK1

New reserved data 2.

NewUK2

New reserved data 3.

NewUK3

New reserved data 4.

NewUK4

New reserved data 5.

NewUK5

New reserved data 6.

NewUK6

New reserved data 7.

NewUK7

New reserved data 8.

TopoNthp

Index of the topology that contains the next hop.

This field displays 0 if the next hop is on the public network.

This field displays Invalid if the next hop is on an IPv6 network, because the router does not support non-base topologies.

ExtType

NIB extension type.

Color

Color extended community attribute.

COFlag

Flag of the color extended community attribute.

SIDIndex

SID index value.

 

# Display detailed IPv6 static route next hop information.

<Sysname> display ipv6 route-static nib verbose

Total number of nexthop(s): 35

 

      NibID: 0x21000000        Sequence: 0

       Type: 0x41               Flushed: Yes

   UserKey0: 0x0                VrfNthp: 0

   UserKey1: 0x0                Nexthop: 2::3

    IFIndex: 0x0              LocalAddr: ::

     NewUK0: 0x0                 NewUK1: 0x0

     NewUK2: 0x0                 NewUK3: 0x0

     NewUK4: 0x0                 NewUK5: 0x0

     NewUK6: 0x0                 NewUK7: 0x0

   TopoNthp: Invalid            ExtType: 0x0

      Color: 0                   COFlag: 0x0

   SIDIndex: 0x0

     RefCnt: 1              FlushRefCnt: 0

       Flag: 0x12               Version: 1

 1 nexthop(s):

PrefixIndex: 0              OrigNexthop: 2::3

  RelyDepth: 2              RealNexthop: ::

  Interface: NULL0            LocalAddr: ::

  TunnelCnt: 0                      Vrf: default-vrf

   TunnelID: N/A               Topology:

     Weight: 0                    Flags: 0x0

SRPolicyNID: 4294967295     SRInterface:

ColorWeight: 0

 

      NibID: 0x21000001        Sequence: 1

       Type: 0x41               Flushed: Yes

   UserKey0: 0x0                VrfNthp: 0

   UserKey1: 0x0                Nexthop: 3::4

    IFIndex: 0x0              LocalAddr: ::

     NewUK0: 0x0                 NewUK1: 0x0

     NewUK2: 0x0                 NewUK3: 0x0

     NewUK4: 0x0                 NewUK5: 0x0

     NewUK6: 0x0                 NewUK7: 0x0

   TopoNthp: Invalid            ExtType: 0x0

      Color: 0                   COFlag: 0x0

   SIDIndex: 0x0

     RefCnt: 1              FlushRefCnt: 0

       Flag: 0x12               Version: 1

 1 nexthop(s):

PrefixIndex: 0              OrigNexthop: 3::4

  RelyDepth: 1              RealNexthop: ::

  Interface: HGE1/0/1         LocalAddr: ::

  TunnelCnt: 0                      Vrf: default-vrf

   TunnelID: N/A               Topology:

     Weight: 0                    Flags: 0x0

SRPolicyNID: 4294967295     SRInterface:

ColorWeight: 0

 

...

Table 2 Command output

Field

Description

x nexthop(s)

Number of next hops.

Tnl-Policy

Tunnel policy.

PrefixIndex

Prefix index of the next hop for an ECMP route.

Vrf

VPN instance name. For the public network, this field displays default-vrf.

OrigNexthop

Original next hop.

RealNexthop

Real next hop.

Interface

Output interface.

localAddr

Local interface address.

RelyDepth

Recursion depth.

TunnelCnt

Number of tunnels after route recursion.

TunnelID

ID of the tunnel after route recursion.

Topology

Topology name. This field is blank for IPv6, because IPv6 does not support non-base topologies.

Weight

ECMP route weight. This field displays 0 for non-ECMP routes.

RefCnt

Reference count of the next hop.

FlushRefCnt

Reference count of the next hop that is flushed to the FIB.

Flag

Flag of the next hop.

Version

Version of the next hop.

ExtType

NIB extension type.

Color

Color extended community attribute.

COFlag

Flag of the color extended community attribute.

SIDIndex

SID index value.

Flags

Flags of the detailed next hop.

SRPolicyNID

NIB ID of the route obtained from an SR-TE policy through route recursion.

SRInterface

Output interface of the route obtained from the SR-TE policy through route recursion.

ColorWeight

Weight value of the color attribute in the SR-TE policy.

 

display ipv6 route-static routing-table

Use display ipv6 route-static routing-table to display IPv6 static routing table information.

Syntax

display ipv6 route-static routing-table [ vpn-instance vpn-instance-name ] [ ipv6-address prefix-length ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, the command displays IPv6 static routing table information for the public network.

ipv6-address: Specifies the destination IPv6 address.

prefix-length: Specifies the prefix length in the range of 0 to 128.

Examples

# Display IPv6 static routing table information.

<Sysname> display ipv6 route-static routing-table

Total number of routes: 5

 

Status: * - valid

 

*Destination: 1::1/128

       NibID: 0x21000000        NextHop: 2::2

   MainNibID: N/A             BkNextHop: N/A

     BkNibID: N/A             Interface: HundredGigE1/0/1

     TableID: 0xa           BkInterface: N/A

        Flag: 0x80d0a          BfdSrcIp: N/A

     DbIndex: 0x3            BfdIfIndex: 0x0

        Type: Normal        BfdVrfIndex: 0

  TrackIndex: 0xffffffff          Label: NULL

  Preference: 60            vrfIndexDst: 0

     BfdMode: N/A            vrfIndexNH: 0

   Permanent: 0                     Tag: 0

   BfdStatic: bfd01

 

*Destination: 1::1234/128

      NibID: 0x21000000        NextHop: 2::2

   MainNibID: N/A             BkNextHop: N/A

     BkNibID: N/A             Interface: NULL0

     TableID: 0xa           BkInterface: N/A

        Flag: 0x80d0a          BfdSrcIp: N/A

     DbIndex: 0x1            BfdIfIndex: 0x0

        Type: Normal        BfdVrfIndex: 0

  TrackIndex: 0xffffffff          Label: NULL

  Preference: 60            vrfIndexDst: 0

     BfdMode: N/A            vrfIndexNH: 0

   Permanent: 0                     Tag: 0

 

...

Table 3 Command output

Field

Description

Destination

Destination address/prefix.

NibID

ID of the NIB.

MainNibID

ID of the primary next hop for static route FRR.

BkNibID

ID of the backup next hop for static route FRR.

NextHop

Next hop address.

BkNextHop

Backup next hop address.

Interface

Output interface of the route.

BkInterface

Backup output interface.

TableID

ID of the table to which the route belongs.

DbIndex

Index of the database to which the route belongs.

Type

Route type:

·     Normal.

·     DHCP.

BfdSrcIp

Source IPv6 address of the indirect BFD session.

BfdIfIndex

Index of the interface where BFD is enabled.

BfdVrfIndex

Index of the VPN instance where BFD is enabled. This field displays 0 if BFD is enabled for the public network.

BfdMode

BFD session mode:

·     N/A—No BFD session is configured.

·     Ctrl—Control packet mode.

·     Echo—Echo packet mode.

TrackIndex

NQA Track index.

vrfIndexDst

Index of the VPN instance to which the destination belongs. For the public network, this field displays 0.

vrfIndexNH

Index of the VPN instance to which the next hop belongs. For the public network, this field displays 0.

Permanent

Permanent static route flag. 1 indicates a permanent static route.

BfdStatic

Name of the static BFD session associated with the route. This field is not displayed if no static BFD session has been associated with the route.

 

ipv6 route-static

Use ipv6 route-static to configure an IPv6 static route.

Use undo ipv6 route-static to remove an IPv6 static route.

Syntax

ipv6 route-static ipv6-address prefix-length { interface-type interface-number [ next-hop-address ] [ bfd { { control-packet | echo-packet } [ bfd-source ipv6-address ] | static session-name } | permanent | track track-entry-number ] | [ vpn-instance d-vpn-instance-name ] next-hop-address [ bfd { control-packet bfd-source ipv6-address | static session-name } | permanent | track track-entry-number ] } [ preference preference ] [ tag tag-value ] [ description text ]

ipv6 route-static ipv6-address prefix-length vpn-instance d-vpn-instance-name [ preference preference ] [ tag tag-value ] [ description text ]

undo ipv6 route-static ipv6-address prefix-length [ interface-type interface-number [ next-hop-address ] | vpn-instance d-vpn-instance-name | [ vpn-instance d-vpn-instance-name ] next-hop-address ] [ preference preference ]

Default

No IPv6 static route is configured.

Views

System view

Predefined user roles

network-admin

Parameters

ipv6-address prefix-length: Specifies the IPv6 address and prefix length.

interface-type interface-number: Specifies an output interface by its type and number. If the output interface is an NBMA interface or broadcast interface and not a point-to-point (P2P) interface, the next hop address must be specified.

next-hop-address: Specifies the next hop IPv6 address.

bfd: Enables BFD to detect reachability of the static route's next hop. For more information about BFD, see High Availability Configuration Guide.

control-packet: Specifies the BFD control packet mode.

bfd-source ipv6-address: Specifies the source IPv6 address of BFD packets.

echo-packet: Specifies the BFD echo packet mode.

static session-name: Associates the IPv6 static route with a static BFD session. The session-name argument represents the static BFD session name, a case-sensitive string of 1 to 64 characters. If you specify a nonexistent static BFD session, you must create the static BFD session to have the configuration take effect.

permanent: Specifies the IPv6 route as a permanent IPv6 static route. If the output interface is down, the permanent IPv6 static route is still active.

track track-entry-number: Associates the IPv6 static route with a track entry specified by its number in the range of 1 to 1024. For more information about Track, see High Availability Configuration Guide.

public: Indicates the next hop is on the public network.

vpn-instance d-vpn-instance-name: Specifies a destination MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify the next-hop-address argument following this option, the device searches for the output interface in the specified destination VPN instance for packets matching the static route. If you specify the next-hop-address argument and this option, the device searches for the output interface in the specified destination VPN instance based on the specified next hop address for packets matching the static route.

preference preference: Specifies a preference for IPv6 static routes, in the range of 1 to 255. The default is 60.

tag tag-value: Sets a tag for marking the static route, in the range of 1 to 4294967295. The default is 0. Tags of routes are used for route control in routing policies. For more information about routing policies, see Layer 3—IP Routing Configuration Guide.

description text: Configures a description for the IPv6 static route, which consists of 1 to 150 characters, including special characters such as the space, but excluding the question mark (?).

Usage guidelines

An IPv6 static route that has the destination address configured as ::/0 (a prefix length of 0) is the default IPv6 route. If the destination address of an IPv6 packet does not match any entry in the routing table, this default route is used to forward the packet.

Follow these guidelines to configure the output interface, next hop address, or both for a static route:

·     If the output interface is a broadcast interface or an NBMA interface, the next hop address must be specified.

·     If the output interface is a P2P interface, you can specify only the output interface. You do not need to change the configuration of the route even if the peer address is changed.

Follow these guidelines when you configure BFD for IPv6 static routes:

·     In BFD control packet mode, if you specify the source IPv6 address of BFD packets, you must specify the IPv6 address as the next hop IPv6 address on the peer device.

·     In BFD control packet mode, if you specify a non-P2P output interface and a direct next hop, specify the bfd-source ipv6-address option as a best practice. Make sure the source IPv6 address of BFD packets meets the following requirements:

¡     The address is the same as the IPv6 address of the output interface.

¡     The address is on the same network segment as the next hop IPv6 address of the same type.

For example, if the next hop IPv6 address is a link-local address, the source IPv6 address of BFD packets must also be a link-local address.

·     To use a static BFD session to detect next hop reachability for an IPv6 static route, you must perform the following tasks:

¡     Specify the IPv6 address of the output interface of the static route as the source address of the static BFD session.

¡     Specify the IPv6 address of the next hop of the static route as the peer address of the static BFD session.

·     In BFD echo packet mode, the next hop IPv6 address of echo packets must be a global unicast address.

·     Enabling BFD for a flapping route could worsen the route flapping situation. Therefore, use it with caution.

For static routing-Track-NQA collaboration, you must configure the same VPN instance ID for the next hop to be detected and the NQA operation.

Examples

# Configure an IPv6 static route, with the destination address 1:1:2::/64 and next hop 1:1:3::1.

<Sysname> system-view

[Sysname] ipv6 route-static 1:1:2:: 64 1:1:3::1

Related commands

bfd static (High Availability Command Reference)

display ipv6 routing-table protocol

ipv6 route-static bfd

Use ipv6 route-static bfd to configure BFD session parameters for an IPv6 static route.

Use undo ipv6 route-static bfd to restore the default.

Syntax

BFD control packet mode for single-hop detection and BFD echo packet mode:

ipv6 route-static bfd interface-type interface-number next-hop-address { detect-multiplier detect-multiplier | min-echo-receive-interval min-echo-receive-interval | min-receive-interval min-receive-interval | min-transmit-interval min-transmit-interval } *

undo ipv6 route-static bfd interface-type interface-number next-hop-address

BFD control packet mode for multihop detection:

ipv6 route-static bfd [ vpn-instance d-vpn-instance-name ] next-hop-address source-ipv6 ipv6-address { detect-multiplier detect-multiplier | min-receive-interval min-receive-interval | min-transmit-interval min-transmit-interval } *

undo ipv6 route-static bfd [ vpn-instance d-vpn-instance-name ] next-hop-address

Default

No BFD session parameters are specifically configured for an IPv6 static route. The IPv6 static route uses the session parameters configured for the BFD module (common BFD session parameters).

Views

System view

Predefined user roles

network-admin

Parameters

interface-type interface-number: Specifies an output interface by its type and number.

vpn-instance d-vpn-instance-name: Specifies a destination MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If the next hop of the IPv6 static route belongs to the public network, do not specify this option.

next-hop-address: Specifies the IPv6 address of the next hop.

source-ipv6 ipv6-address: Specifies a source IPv6 address for BFD packets.

detect-multiplier detect-multiplier: Sets the BFD detection time multiplier. The value range for the detect-multiplier argument is 3 to 50. The default value is 5.

min-echo-receive-interval min-echo-receive-interval: Sets the minimum interval for receiving BFD echo packets, in milliseconds. The value range for the min-echo-receive-interval argument is 10 to 10000.

min-receive-interval min-receive-interval: Sets the minimum interval for receiving BFD control packets, in milliseconds. The value range for the min-receive-interval argument is 10 to 10000.

min-transmit-interval min-transmit-interval: Sets the minimum interval for transmitting BFD control packets, in milliseconds. The value range for the min-transmit-interval argument is 10 to 10000.

Usage guidelines

Use this command to configure BFD session parameters for an IPv6 static route, including parameters that determine the BFD detection time. The BFD detection time = detect-multiplier × max (min-echo-receive-interval, min-receive-interval, min-transmit-interval). For more information about the calculation method of BFD detection time, see BFD in High Availability Command Reference.

If you specify the output interface when executing this command, support for the BFD session parameters varies by BFD session mode.

·     Echo-mode BFD sessions support only the min-echo-receive-interval and detect-multiplier parameters.

·     Control-mode BFD sessions for single-hop detection support only the min-receive-interval, min-transmit-interval, and detect-multiplier parameters.

To apply the configured BFD session parameters, use one of the following combinations of parameters to specify an IPv6 static route:

·     In control packet mode for single-hop detection and in echo packet mode, use the output interface and next hop IPv6 address.

·     In control packet mode for multihop detection, use the next hop IPv6 address and BFD packet source IPv6 address. If the next hop belongs to a VPN instance, use the destination VPN instance, next hop IPv6 address, and BFD packet source IPv6 address to specify the IPv6 static route.

For an unspecified BFD session parameter, the IPv6 static route uses the value of the corresponding common BFD session parameter.

Examples

# Configure BFD session parameters for the IPv6 static route with output interface HundredGigE 1/0/1 and next hop 1:2::3:4. The BFD detection time multiplier is 20 and the minimum interval for receiving BFD echo packets is 1000 milliseconds.

<Sysname> system-view

[Sysname] ipv6 route-static bfd hundredgige 1/0/1 1:2::3:4 detect-multiplier 20 min-echo-receive-interval 1000

ipv6 route-static default-preference

Use ipv6 route-static default-preference to set a default preference for IPv6 static routes.

Use undo ipv6 route-static default-preference to restore the default.

Syntax

ipv6 route-static default-preference default-preference

undo ipv6 route-static default-preference

Default

The default preference of IPv6 static routes is 60.

Views

System view

Predefined user roles

network-admin

Parameters

default-preference: Specifies a default preference for IPv6 static routes, in the range of 1 to 255.

Usage guidelines

If no preference is specified for an IPv6 static route, the default preference applies.

When the default preference is reconfigured, it applies only to newly added IPv6 static routes.

Examples

# Set a default preference of 120 for IPv6 static routes.

<Sysname> system-view

[Sysname] ipv6 route-static default-preference 120

Related commands

display ipv6 routing-table protocol

ipv6 route-static fast-reroute auto

Use ipv6 route-static fast-reroute auto to configure IPv6 static route FRR to automatically select a backup next hop.

Use undo ipv6 route-static fast-reroute auto to disable IPv6 static route FRR from automatically selecting a backup next hop.

Syntax

ipv6 route-static fast-reroute auto

undo ipv6 route-static fast-reroute auto

Default

IPv6 static route FRR is disabled from automatically selecting a backup next hop.

Views

System view

Predefined user roles

network-admin

Examples

# Configure IPv6 static route FRR to automatically select a backup next hop.

<Sysname> system-view

[Sysname] ipv6 route-static fast-reroute auto

ipv6 route-static primary-path-detect bfd echo

Use ipv6 route-static primary-path-detect bfd echo to enable BFD echo packet mode for IPv6 static route FRR.

Use undo ipv6 route-static primary-path-detect bfd to disable BFD echo packet mode for IPv6 static route FRR.

Syntax

ipv6 route-static primary-path-detect bfd echo

undo ipv6 route-static primary-path-detect bfd

Default

BFD echo packet mode is disabled for IPv6 static route FRR.

Views

System view

Predefined user roles

network-admin

Usage guidelines

For quicker IPv6 static route FRR, use BFD echo packet mode on the primary link of redundant links to detect link failure.

Examples

# Enable BFD echo packet mode for IPv6 static route FRR.

<Sysname> system-view

[Sysname] ipv6 route-static primary-path-detect bfd echo

ipv6 route-static vpn-instance

Use ipv6 route-static vpn-instance to configure an IPv6 static route in a VPN instance.

Use undo ipv6 route-static vpn-instance to delete an IPv6 static route from a VPN instance.

Syntax

ipv6 route-static vpn-instance s-vpn-instance-name ipv6-address prefix-length interface-type interface-number [ next-hop-address ] [ bfd { { control-packet | echo-packet } [ bfd-source ipv6-address ] | static session-name } | permanent | track track-entry-number ] [ preference preference ] [ tag tag-value ] [ description text ]

ipv6 route-static vpn-instance s-vpn-instance-name ipv6-address prefix-length next-hop-address [ public ] [ bfd { control-packet bfd-source ipv6-address | static session-name } | permanent | track track-entry-number ] [ preference preference ] [ tag tag-value ] [ description text ]

ipv6 route-static vpn-instance s-vpn-instance-name ipv6-address prefix-length vpn-instance d-vpn-instance-name next-hop-address [ bfd { control-packet bfd-source ipv6-address | static session-name } | permanent | track track-entry-number ] [ preference preference ] [ tag tag-value ] [ description text ]

ipv6 route-static vpn-instance s-vpn-instance-name ipv6-address prefix-length { public | vpn-instance d-vpn-instance-name } [ preference preference ] [ tag tag-value ] [ description text ]

undo ipv6 route-static vpn-instance s-vpn-instance-name ipv6-address prefix-length [ interface-type interface-number [ next-hop-address ] | next-hop-address [ public ] | public | vpn-instance d-vpn-instance-name [ next-hop-address ] ] [ preference preference ]

Default

No IPv6 static route is configured in a VPN instance.

Views

System view

Predefined user roles

network-admin

Parameters

s-vpn-instance-name: Specifies a source MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. Each VPN instance has its own routing table, and the configured IPv6 static route is installed in the routing tables of the specified VPN instances.

ipv6-address prefix-length: Specifies the IPv6 address and prefix length.

interface-type interface-number: Specifies an output interface by its type and number. If the output interface is a non-P2P interface (for example, an NBMA interface or broadcast interface), the next hop address must be specified.

next-hop-address: Specifies the next hop IPv6 address.

bfd: Enables BFD to detect reachability of the static route's next hop. For more information about BFD, see High Availability Configuration Guide.

control-packet: Specifies the BFD control packet mode.

bfd-source ipv6-address: Specifies the source IPv6 address of BFD packets.

echo-packet: Specifies the BFD echo packet mode.

static session-name: Associates the IPv6 static route with a static BFD session. The session-name argument represents the static BFD session name, a case-sensitive string of 1 to 64 characters. If you specify a nonexistent static BFD session, you must create the static BFD session to have the configuration take effect.

permanent: Specifies the IPv6 route as a permanent IPv6 static route. If the output interface is down, the permanent IPv6 static route is still active.

track track-entry-number: Associates the IPv6 static route with a track entry specified by its number in the range of 1 to 1024. For more information about Track, see High Availability Configuration Guide.

public: Specifies the public network. If you specify this keyword following the next-hop-address argument, the next hop is on the public network. The device searches for the output interface in the public network based on the next hop address for packets matching the static route. If you specify the next-hop-address argument without specifying the public keyword, the device searches for the output interface in the source VPN instance based on the next hop address for packets matching the static route. If you specify the public keyword without specifying the next-hop-address argument, the device searches for the output interface in the public network for packets matching the static route.

vpn-instance d-vpn-instance-name: Specifies a destination MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify the next-hop-address argument following this option, the device searches for the output interface in the specified destination VPN instance for packets matching the static route. If you specify the next-hop-address argument and this option, the device searches for the output interface in the specified destination VPN instance based on the specified next hop address for packets matching the static route.

preference preference: Specifies a preference for IPv6 static routes, in the range of 1 to 255. The default is 60.

tag tag-value: Sets a tag for marking the static route, in the range of 1 to 4294967295. The default is 0. Tags of routes are used for route control in routing policies. For more information about routing policies, see Layer 3—IP Routing Configuration Guide.

description text: Configures a description for the IPv6 static route, a string of 1 to 150 characters, including special characters such as the space, but excluding the question mark (?).

Usage guidelines

An IPv6 static route that has the destination address configured as ::/0 (a prefix length of 0) is the default IPv6 route. If the destination address of an IPv6 packet does not match any entry in the routing table, this default route is used to forward the packet.

If you specify a destination VPN instance but do not specify a next hop address, the source and destination VPN instances cannot be the same one.

Follow these guidelines to configure the output interface, next hop address, or both for a static route:

·     If the output interface is a broadcast interface or an NBMA interface, the next hop address must be specified.

·     If the output interface is a P2P interface, you can specify only the output interface. You do not need to change the configuration of the route even if the peer address is changed.

Follow these guidelines when you configure BFD for IPv6 static routes:

·     In BFD control packet mode, if you specify the source IPv6 address of BFD packets, you must specify the IPv6 address as the next hop IPv6 address on the peer device.

·     In BFD control packet mode, if you specify a non-P2P output interface and a direct next hop, specify the bfd-source ipv6-address option as a best practice. Make sure the source IPv6 address of BFD packets meets the following requirements:

¡     The address is the same as the IPv6 address of the output interface.

¡     The address is on the same network segment as the next hop IPv6 address of the same type.

For example, if the next hop IPv6 address is a link-local address, the source IPv6 address of BFD packets must also be a link-local address.

·     To use a static BFD session to detect next hop reachability for an IPv6 static route, the static BFD session and the next hop of the static route must belong to the same VPN instance. In addition, you must perform the following tasks:

¡     Specify the IPv6 address of the output interface of the static route as the source address of the static BFD session.

¡     Specify the IPv6 address of the next hop of the static route as the peer address of the static BFD session.

·     In BFD echo packet mode, the next hop IPv6 address of echo packets must be a global unicast address.

·     Enabling BFD for a flapping route could worsen the route flapping situation. Therefore, use it with caution.

For static routing-Track-NQA collaboration, you must configure the same VPN instance ID for the next hop to be detected and the NQA operation.

Examples

# Configure an IPv6 static route for VPN instance vpn1, whose destination address is 1:1:2::/64, destination VPN instance is vpn2, and next hop address is 1:1:3::1.

<Sysname> system-view

[Sysname] ipv6 route-static vpn-instance vpn1 1:1:2:: 64 vpn-instance vpn2 1:1:3::1

Related commands

bfd static (High Availability Command Reference)

display ipv6 routing-table protocol

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