07-MPLS Command Reference

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01-MPLS SR commands
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01-MPLS SR commands 116.97 KB

MPLS SR commands

display isis segment-routing adjacency

Use display isis segment-routing adjacency to display IS-IS SR adjacency segment information.

Syntax

display isis segment-routing adjacency [ process-id ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

process-id: Specifies an IS-IS process ID in the range of 1 to 65535. If you do not specify this argument, the command displays SR adjacency segment information about all IS-IS processes.

Examples

# Display SR adjacency segment information about IS-IS process 1.

<Sysname> display isis segment-routing adjacency 1

 

               Segment routing adjacency path information for IS-IS(1)

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

 

SystemID            Interface       Nexthop         Label          Type

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

0000.0000.0011      Vlan1           10.123.110.21   24122          L1

0000.0000.0012      Vlan2           192.168.56.21   24121          L1

Table 1 Command output

Field

Description

SystemID

System ID of the neighbor.

Interface

Interface connected to the neighbor.

Nexthop

Next hop of the adjacency segment.

Label

Incoming label.

Type

Link adjacency type of the interface.

 

display isis segment-routing global-block

Use display isis segment-routing global-block to display IS-IS SRGB information.

Syntax

display isis segment-routing global-block [ level-1 | level-2 ] [ process-id ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

level-1: Specifies Level-1 SRGB.

level-2: Specifies Level-2 SRGB.

process-id: Specifies an IS-IS process ID in the range of 1 to 65535. If you do not specify this argument, the command displays the SRGBs of all IS-IS processes.

Usage guidelines

If you do not specify the level-1 or level-2 keyword, the command displays information about both the Level-1 SRGB and Level-2 SRGB.

Examples

# Display information about the SRGBs for IS-IS process 1.

<Sysname> display isis segment-routing global-block 1

 

             Segment routing global block information for IS-IS(1)

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

 

                          Level-1 SRGB

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

System ID                          Base                Range

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

0000.0000.0011                     16666               5557

0000.0000.0012                     18012               4001

Table 2 Command output

Field

Description

System ID

System ID of the neighbor.

Base

Minimum label value of the SRGB.

Range

Number of labels in the SRGB.

 

Related commands

segment-routing global-block

display mpls static-sr-mpls

Use display mpls static-sr-mpls to display static SRLSP and adjacency segment information.

Syntax

display mpls static-sr-mpls { lsp [ lsp-name ] | adjacency [ adjacency-path-name ] }

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

lsp: Displays static SRLSP information.

lsp-name: Specifies a static SRLSP by its name, a case-sensitive string of 1 to 15 characters. If you do not specify this argument, the command displays information about all static SRLSPs.

adjacency: Displays static adjacency segment information.

adjacency-path-name: Specifies a static adjacency segment by its name, a case-sensitive string of 1 to 15 characters. If you do not specify this argument, the command displays information about all static adjacency segments.

Examples

# Display information about all static SRLSPs.

<Sysname> display mpls static-sr-mpls lsp lsp1

Name           : lsp1

Type           : LSP

In-Label       : -

Out-Label      : 60,70,80

Out-Interface  : -

Nexthop        : -

State          : Up

Table 3 Command output

Field

Description

Name

Name of the static SRLSP or adjacency segment.

Type

Information type:

·     LSP—Static SRLSP information.

·     Adjacency—Adjacency segment information.

In-Label

Incoming label.

Out-Label

Outgoing label.

Out-Interface

Output interface.

Nexthop

Next hop address.

State

Status of the static SRLSP or adjacency segment:

·     Down—The static SRLSP or adjacency segment is not available.

·     Up—The static SRLSP or adjacency segment is available.

 

Related commands

static-sr-mpls adjacency

static-sr-mpls lsp

display mpls static-sr-mpls prefix

Use display mpls static-sr-mpls prefix to display static prefix segment information.

Syntax

display mpls static-sr-mpls prefix [ path lsp-name | destination ip-address [ mask | mask-length ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

path lsp-name: Displays static prefix segment information for the specified static SRLSP. The lsp-name argument specifies a static SRLSP by its name, a case-sensitive string of 1 to 15 characters.

destination ip-address: Displays static prefix segment information for the specified destination address. The ip-address argument specifies a destination address.

mask: Specifies the destination address mask.

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

Usage guidelines

If you do not specify any parameters, this command displays information about all static prefix segments.

Examples

# Display information about all static prefix segments.

<Sysname> display mpls static-sr-mpls prefix

Prefix Name    : prefixname

Destination    : 2.2.2.2/32

In-Label       : 1024

Active         : Yes(1)

Out-Interface  : Vlan2

Nexthop        : 10.0.0.2

Out-Label      : 600000

Status         : up

Out-Interface  : Vlan3

Nexthop        : 11.0.0.2

Out-Label      : 600002

Status         : down(No Route)

Out-Interface  : Vlan4

Nexthop        : 12.0.0.2

Out-Label      : 600001

Status         : down(No Mpls)

Table 4 Command output

Field

Description

Prefix Name

Name of the prefix segment.

Destination

Destination IP address of the prefix segment.

In-Label

Incoming label of the prefix segment.

Active

Status of the prefix segment:

·     Yes(count)—The prefix segment is active. The value of count represents the number of egresses in up status.

·     No—The prefix segment is inactive.

Out-Interface

Outgoing interface of the prefix segment.

Nexthop

Next hop of the prefix segment.

Out-Label

Outgoing label of the prefix segment.

Status

Status of the egress:

·     down—The egress is inactive. The cause is displayed in brackets, which can be No Route or No Mpls. No Route means that the device has no route to reach the destination IP address over the outgoing interface. No Mpls means that MPLS is disabled on the output interface.

·     up—The egress is active.

·     duplicate—An egress conflict has occurred because the output interface is already used by another prefix segment.

 

Related commands

static-sr-mpls prefix

isis prefix-sid

Use isis prefix-sid to configure an IS-IS prefix SID.

Use undo isis prefix-sid to restore the default.

Syntax

isis prefix-sid { absolute absolute-value | index index-value } [ n-flag-clear ] [ explicit-null ]

undo isis prefix-sid

Default

No IS-IS prefix SID is configured.

Views

Loopback interface view

Predefined user roles

network-admin

Parameters

absolute absolute-value: Specifies an absolute value as the prefix SID. The absolute-value argument is in the range of 0 to 1048575.

index index-value: Specifies an index value. The index-value argument is in the range of 0 to 1048575.

n-flag-clear: Sets the Node-SID flag bit of the prefix SID to 0 to use the prefix SID for a group of SR nodes. If you do not specify this keyword, the flag bit is 1 and the prefix SID is used for a single SR node.

explicit-null: Sets the Explicit-null flag bit of the prefix SID to 1. This setting requires that the upstream neighbor uses an explicit null label to replace the prefix SID. If you do not specify this keyword, the flag bit is 0 and the upstream neighbor continues to forward the packet based on the prefix SID. For more information about the explicit null label, see MPLS basics configuration in MPLS Configuration Guide.

Usage guidelines

An absolute value used as the prefix SID must be in the SRGB of the node.

If you specify an index value, the sum of the index value and the SRGB base value is used as the prefix SID. The prefix SID must be in the SRGB of the node.

To use a prefix SID for a group of SR nodes in anycast scenarios, specify the n-flag-clear keyword to set the Node-SID flag bit of the prefix SID to 0.

To configure an IS-IS prefix SID, you must enable an IS-IS process on the loopback interface.

Examples

# Set the IS-IS prefix SID index to 20 on loopback interface 1.

<Sysname> system-view

[Sysname] interface loopback 1

[Sysname-LoopBack1] isis enable 1

[Sysname-LoopBack1] isis prefix-sid index 20

mpls te static-sr-mpls

Use mpls te static-sr-mpls to bind a static SRLSP to an MPLS TE tunnel interface.

Use undo mpls te static-sr-mpls to unbind a static SRLSP from an MPLS TE tunnel interface.

Syntax

mpls te static-sr-mpls lsp-name [ backup ]

undo mpls te static-sr-mpls lsp-name

Default

An MPLS TE tunnel interface does not use any static SRLSPs.

Views

Tunnel interface view

Predefined user roles

network-admin

Parameters

lsp-name: Specifies a static SRLSP by its name, a case-sensitive string of 1 to 15 characters. The specified static SRLSP must be already created by using the static-sr-mpls lsp command.

backup: Specifies the backup static SRLSP. If you do not specify this keyword, this command specifies the main static SRLSP.

Usage guidelines

Execute this command only on the ingress node of a static SRLSP.

This command takes effect only if you have configured the mpls te signaling static command in tunnel interface view.

You can specify the backup keyword to bind a backup static SRLSP only if both the main and backup SRLSPs are established by using the adjacency segment method.

If you execute both the mpls te static-sr-mpls and mpls te static-cr-lsp commands on the device, only the mpls te static-cr-lsp command takes effect. For the mpls te static-sr-mpls command to take effect, execute the undo mpls te static-cr-lsp command.

Examples

# Bind static SRLSP static-sr-3 to MPLS TE tunnel interface 0.

<Sysname> system-view

[Sysname] interface tunnel 0 mode mpls-te

[Sysname-Tunnel0] mpls te static-sr-mpls static-sr-3

Related commands

display mpls te tunnel-interface (MPLS Command Reference)

mpls te signaling (MPLS Command Reference)

mpls te static-cr-lsp (MPLS Command Reference)

static-sr-mpls lsp

segment-routing adjacency enable

Use segment-routing adjacency enable to enable MPLS SR adjacency label allocation.

Use undo segment-routing adjacency enable to disable MPLS SR adjacency label allocation.

Syntax

segment-routing adjacency enable

undo segment-routing adjacency enable

Default

MPLS SR adjacency label allocation is disabled.

Views

IS-IS IPv4 unicast address family view

Predefined user roles

network-admin

Usage guidelines

For this command to take effect, you must enable MPLS SR.

Examples

# Enable MPLS SR adjacency label allocation for IS-IS process 1.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] address-family ipv4

[Sysname-isis-1-ipv4] segment-routing adjacency enable

Related commands

segment-routing mpls

segment-routing global-block

Use segment-routing global-block to configure the MPLS SRGB.

Use undo segment-routing global-block to restore the default.

Syntax

segment-routing global-block minimum-value maximum-value

undo segment-routing global-block

Default

The minimum label value is 16000. The maximum label value is 24000.

Views

IS-IS view

Predefined user roles

network-admin

Parameters

minimum-value: Specifies the minimum label value, in the range of 16000 to 23999.

maximum-value: Specifies the maximum label value, in the range of 16001 to 24000.

Usage guidelines

To configure the SRGB successfully, make sure the SRGB contains the configured prefix SID.

Examples

# Configure the MPLS SRGB to be from 17000 to 22000 for IS-IS process 1.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] segment-routing global-block 17000 22000

segment-routing mpls

Use segment-routing mpls to enable MPLS SR.

Use undo segment-routing mpls to disable MPLS SR.

Syntax

segment-routing mpls

undo segment-routing mpls

Default

MPLS SR is disabled.

Views

IS-IS IPv4 unicast address family view

Predefined user roles

network-admin

Usage guidelines

For MPLS SR to take effect, set the IS-IS cost style to wide, compatible, or wide-compatible before configuring IS-IS to support MPLS SR. For more information about the cost style, see IS-IS configuration in Layer 3IP Routing Configuration Guide.

Examples

# Enable MPLS SR in IS-IS IPv4 unicast address family view of IS-IS process 1.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] cost-style wide

[Sysname-isis-1] address-family ipv4

[Sysname-isis-1-ipv4] segment-routing mpls

Related commands

cost-style (Layer 3IP Routing Command Reference)

segment-routing sr-prefer

Use segment-routing sr-prefer to configure the device to prefer SRLSPs in traffic forwarding.

Use undo segment-routing sr-prefer to restore the default.

Syntax

segment-routing sr-prefer [ prefix-list prefix-list-name ]

undo segment-routing sr-prefer

Default

The device prefers LDP LSPs in traffic forwarding.

Views

IS-IS IPv4 unicast address family view

Predefined user roles

network-admin

Parameters

prefix-list prefix-list-name: Specifies an IP address prefix list by its name, a case-sensitive string of 1 to 63 characters. The device preferentially uses SRLSPs to forward traffic destined for addresses on the prefix list, and preferentially uses LDP LSPs to forward traffic destined for other addresses. If you do not specify an IP address prefix list, the device preferentially uses SRLSPs to forward all traffic.

Usage guidelines

This command determines whether the device prefers SRLSPs or LDP LSPs when both SRLSPs and LDP LSPs are available for traffic forwarding.

This command takes effect only when MPLS SR is enabled and the SRLSPs use prefix SIDs.

Examples

# Configure the device to preferentially use SRLSPs established by IS-IS process 1 to forward traffic destined for the IPv4 unicast address family.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] address-family ipv4

[Sysname-isis-1-ipv4] segment-routing sr-prefer

Related commands

ip prefix-list (Layer 3—IP Routing Command Reference)

segment-routing mpls

static-sr-mpls adjacency

Use static-sr-mpls adjacency to configure an adjacency segment for static MPLS SR.

Use undo static-sr-mpls adjacency to delete an adjacency segment.

Syntax

static-sr-mpls adjacency adjacency-path-name in-label label-value { nexthop ip-address | outgoing-interface interface-type interface-number }

undo static-sr-mpls adjacency adjacency-path-name

Default

No adjacency segments exist.

Views

System view

Predefined user roles

network-admin

Parameters

adjacency-path-name: Specifies the adjacency segment name, a case-sensitive string of 1 to 15 characters.

in-label label-value: Specifies the incoming label, in the range of 16 to 1023.

nexthop ip-address: Specifies the next hop address.

outgoing-interface interface-type interface-number: Specifies an output interface by its type and number. The output interface must be a P2P interface.

Usage guidelines

Execute this command on all nodes of a static SRLSP.

If you specify the next hop address, make sure the following requirements are met:

·     The device has a route to reach the next hop address.

·     MPLS is enabled on the output interface of the route.

If you specify an output interface, make sure the following requirements are met:

·     The interface is up.

·     The interface can receive direct routes.

·     MPLS is enabled on the interface.

The incoming label specified by this command must be different than existing static LSPs, static PWs, and static CRLSPs. If not, the configured adjacency segment is unavailable. The adjacency segment cannot become available even if you change the incoming label of the static LSP, static PW, or static CRLSP. To resolve this problem, you must delete the existing adjacency segment and configure a new one with a different incoming label.

Examples

# Configure an adjacency segment named adj1. Set the incoming label to 100 and the next hop address to 12.2.1.2.

<Sysname> system-view

[Sysname] static-sr-mpls adjacency adj1 in-label 100 nexthop 12.2.1.2

Related commands

display static-sr-mpls

static-sr-mpls lsp

static-sr-mpls lsp

Use static-sr-mpls lsp to configure a static SRLSP.

Use undo static-sr-mpls lsp to delete a static SRLSP.

Syntax

static-sr-mpls lsp lsp-name out-label out-label-value&<1-n>

undo static-sr-mpls lsp lsp-name

Default

No static SRLSPs exist.

Views

System view

Predefined user roles

network-admin

Parameters

lsp-name: Specifies the static SRLSP name, a case-sensitive string of 1 to 15 characters.

out-label out-label-value&<1-4>: Specifies a space-separated list of up to 4 outgoing labels, corresponding to the labels from top to bottom in the label stack. The value range for the out-label-value argument is 0, 3, and 16 to 1048575.

Usage guidelines

Execute this command only on the ingress node of a static SRLSP.

The outgoing labels represent an ordered list of labels allocated for the adjacencies or nodes that a static SRLSP traverses. The top label is the label that the ingress node allocates for the adjacency or destination prefix.

Examples

# Configure a static SRLSP named lsp1. Specify outgoing labels 100 and 200 for the SRLSP.

<Sysname> system-view

[Sysname] static-sr-mpls lsp lsp1 out-label 100 200

Related commands

static-sr-mpls adjacency

static-sr-mpls prefix

Use static-sr-mpls prefix to configure a prefix segment for static MPLS SR.

Use undo static-sr-mpls prefix to delete a prefix segment.

Syntax

static-sr-mpls prefix prefix-path-name destination ip-address { mask | mask-length } in-label in-label-value [ { nexthop ip-address | outgoing-interface interface-type interface-number } out-label out-label-value ]

undo static-sr-mpls prefix prefix-path-name [ destination ip-address { mask | mask-length } in-label in-label-value [ nexthop ip-address | output-interface interface-type interface-number ] ]

Default

No prefix segments exist.

Views

System view

Predefined user roles

network-admin

Parameters

prefix-path-name: Specifies the prefix segment name, a case-sensitive string of 1 to 15 characters.

destination ip-address: Specifies the destination IP address.

mask: Specifies the mask.

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

in-label label-value: Specifies the incoming label, in the range of 16000 to 24000.

nexthop ip-address: Specifies the next hop address.

outgoing-interface interface-type interface-number: Specifies an output interface by its type and number. The output interface must be a P2P interface.

out-label out-label-value: Specifies the outgoing label, in the range of 0, 3, and 16 to 1048575.

Usage guidelines

Execute this command on all nodes of a static SRLSP.

A prefix segment must use the next hop or output interface of the optimal route to the destination address of the prefix segment. You can configure multiple prefix segments to the destination address for load sharing if the optimal route has more than one next hops or output interfaces. To avoid configuration failure, make sure all prefix segments use the same prefix segment name, and incoming label.

If you specify only the prefix-path-name argument, the undo static-sr-mpls prefix command deletes all prefix segments with the specified name. If you specify all parameters, only the prefix segment that matches the specified name, destination IP address, and next hop or output interface is deleted.

Examples

# Configure a prefix segment named prefix1. Set the destination IP address, incoming label, outgoing label, and next hop to 2.2.2.2, 16000, 16001, and 10.0.0.2, respectively.

<Sysname> system-view

[Sysname] static-sr-mpls prefix prefix1 destination 2.2.2.2 32 in-label 16000 nexthop 10.0.0.2 out-label 16001

Related commands

display mpls static-sr-mpls prefix

 

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