mpls ping

mpls ping

Performs a connectivity check on an MPLS path.

Syntax: ping mpls {ldp fec | rsvp tunnelName [lsp-id lsp-id]} [cisco-compat] [count] [size] [timeout] [srcIPAddr] [destIPAddr] [expVal] [ttl]

fec

Specifies the LDP FEC to be pinged.

tunnelName

Specifies the RSVP tunnel to be pinged.

lsp-id

Optionally specifies the LSP-ID.

cisco-
compat

Must be specified if either the ingress or the egress of the path is a Cisco router.

count

Specifies the number of pings to send. Valid Values: 1 - 65535. Default: 5.

size

Specifies the packet size of the ping. Valid Values: 100 - 10240. Default: 100.

srcIPAddr

Specifies the Source IP address of the ping.

destIPAddr

Specifies the Destination IP address of the ping.

expVal

Specifies the path EXP value for the ping. Valid Values: 0 - 7. Default: 0.

ttl

Specifies the time-to-live for the ping. Valid Values: 1 - 255. Default: 255.

Description: MPLS ping provides a diagnostic tool for checking the MPLS data plane integrity along the whole MPLS path towards the LSP egress, including all ECMP legs and members of trunk interfaces such as composite links and aggregate links. One-label depth of label stack is checked. For LDP over RSVP LSPs, LDP label liveness is checked. If the LDP LSP is dead, RSVP tunnel is checked as a second step.

MPLS ping provides for the checking of actual labeled packet forwarding for a particular LDP labeled path or RSVP tunnel with physical verification of MTU for the path.

MPLS Ping feature defines a ping and trace route mechanism that accomplish the following goals:

The MPLS ping is used for connectivity checks

Trace route is used for hop-by-hop fault localization as well as path tracing, including ECMP multi-path and members of a trunk interface

Use the mpls ping command to perform a check of an MPLS path integrity.

Use the trace command to perform a hop-by-hop fault localization check.

Factory Default: N/A

Command Mode: Privileged.

Example 1: In the following example, the mpls ping command pings LDP FEC 10.0.0.0/24:

router#ping mpls ldp 10.0.0.0/24

Sending 5, MPLS echoes for 10.0.0.0/24, timeout is 2 seconds:

Codes: 'M' - malformed request, 'T' - unknown TLV,

'N' - no mapping, 'S' - switched for FEC

'.' - timeout

MPLS echo reply from 10.210.169.1: seq=0 time= 6.732 ms

MPLS echo reply from 10.210.169.1: seq=1 time= 1.503 ms

MPLS echo reply from 10.210.169.1: seq=2 time= 1.443 ms

MPLS echo reply from 10.210.169.1: seq=3 time= 1.194 ms

MPLS echo reply from 10.210.169.1: seq=4 time= 1.517 ms

100% success rate (5/5)

router#

Related Commands: trace ldp
trace rsvp

fec	Specifies the LDP FEC to be pinged.
tunnelName	Specifies the RSVP tunnel to be pinged.
lsp-id	Optionally specifies the LSP-ID.
cisco- compat	Must be specified if either the ingress or the egress of the path is a Cisco router.
count	Specifies the number of pings to send. Valid Values: 1 - 65535. Default: 5.
size	Specifies the packet size of the ping. Valid Values: 100 - 10240. Default: 100.
srcIPAddr	Specifies the Source IP address of the ping.
destIPAddr	Specifies the Destination IP address of the ping.
expVal	Specifies the path EXP value for the ping. Valid Values: 0 - 7. Default: 0.
ttl	Specifies the time-to-live for the ping. Valid Values: 1 - 255. Default: 255.

router#ping mpls ldp 10.0.0.0/24 Sending 5, MPLS echoes for 10.0.0.0/24, timeout is 2 seconds: Codes: 'M' - malformed request, 'T' - unknown TLV, 'N' - no mapping, 'S' - switched for FEC '.' - timeout MPLS echo reply from 10.210.169.1: seq=0 time= 6.732 ms MPLS echo reply from 10.210.169.1: seq=1 time= 1.503 ms MPLS echo reply from 10.210.169.1: seq=2 time= 1.443 ms MPLS echo reply from 10.210.169.1: seq=3 time= 1.194 ms MPLS echo reply from 10.210.169.1: seq=4 time= 1.517 ms 100% success rate (5/5) router#

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    Last Updated: 12/19/04 at 14:56:07

mpls ping

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