R3102-R3103-HP 6600/HSR6600 Routers MPLS Command Reference Guide

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Related commands
• display mpls statistics interface
• display mpls statistics lsp
tracert lsp ipv4
Use tracert lsp ipv4 to locate errors on the LSP for a FEC.
Syntax
tracert lsp [ -a source-ip | -exp exp-value | -h ttl-value | -r reply-mode | -t time-out ] * ipv4 dest-addr
mask-length [ destination-ip-addr-header ]
Views
Any view
Default command level
0: Visit level
Parameters
-a source-ip: Specifies the source IP address for the echo request messages.
-exp exp-value: Specifies the EXP value for the echo request messages. The value range for the exp-value
argument is 0 to 7, and the default is 0.
-h ttl-value: Specifies the maximum TTL value for the echo request messages. The value range for the
ttl-value argument is 1 to 255, and the default is 30.
-r reply-mode: Specifies the reply mode of the receiver in response to the echo request messages. The
reply-mode argument can be 1 or 2, where 1 means "Do not respond" and 2 means "Respond using a
UDP packet." The default is 2.
-t time-out: Specifies the timeout interval for the response to an echo request message. The value range
for the time-out argument is 0 to 65535 milliseconds, and the default is 2000 milliseconds.
ipv4 dest-addr mask-length: Specifies a FEC by an IPv4 destination address and the mask length. The
value range for the mask-length argument is 0 to 32.
destination-ip-addr-header: Specifies the destination address in the IP header of the MPLS echo request
messages. It can be any address on subnet 127.0.0.0/8—any local loopback address.
Examples
# Locate errors along the LSP to 3.3.3.9/32.
<Sysname> tracert lsp ipv4 3.3.3.9 32
LSP Trace Route FEC: IPV4 PREFIX 3.3.3.9/32 , press CTRL_C to break.
TTL Replier Time Type Downstream
0 Ingress 10.4.5.1/[1025]
1 10.4.5.1 1 Transit 100.3.4.1/[1024]
2 100.1.4.2 63 Transit 100.1.2.1/[3]
3 100.1.2.1 129 Egress