R3102-R3103-HP 6600/HSR6600 Routers MPLS Configuration Guide

Configuring MPLS LSP tracert

MPLS LSP tracert can be used to locate errors of an MPLS TE tunnel. It sends MPLS echo requests to the

nodes along the MPLS TE tunnel to be inspected, with the TTL increasing from 1 to a specific value. Each

node along the MPLS TE tunnel returns an MPLS echo reply to the ingress due to TTL timeout. Thus, the

ingress can collect information about each hop along the MPLS TE tunnel, so as to locate the failed node.

You can also use MPLS LSP tracert to collect information about each hop along the MPLS TE tunnel, such

as the label allocated.

To locate errors of an MPLS TE tunnel:

Task Command

Remarks

Use MPLS LSP tracert to locate

errors of an MPLS TE tunnel.

tracert lsp [ -a source-ip | -exp

exp-value | -h ttl-value | -r

reply-mode |-t time-out ] * te

interface-type interface-number

Available in any view.

Enabling MPLS TE statistics

To use display commands to view RSVP-TE tunnel statistics, you must first enable MPLS TE statistics by

using this configuration task and set the statistics reading interval by using the statistics interval

command in MPLS view. For more information about the statistics interval command, see MPLS

Command Reference.

To enable MPLS TE statistics collection:

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Enter MPLS view.

mpls N/A

3. Enable statistics collection for

the RSVP-TE tunnel.

statistics te ingress-lsr-id tunnel-id Disabled by default.

You can use the display mpls statistics lsp command, the display mpls statistics lsp in-label command,

and the display mpls statistics tunnel command to view the MPLS TE tunnel statistics. For more

information about the statistics, see MPLS Command Reference.

Displaying and maintaining MPLS TE

Task Command Remarks

Display information about explicit

paths.

display explicit-path [ path-name ]

[ | { begin | exclude | include }

regular-expression ]

Available in any view.