HP MSR2000/3000/4000 Router Series MPLS Configuration Guide

279
Task Command
Use MPLS traceroute to trace the LSPs
for an IPv4 prefix.
tracert mpls [ -a source-ip | -exp exp-value | -h ttl-value | -r
reply-mode | -rtos tos-value | -t time-out | -v | fec-check ] * ipv4
dest-addr mask-length [ destination start-address [ end-address
[ address-increment ] ] ]
Configuring periodic MPLS traceroute for LSPs
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enable MPLS BFD.
mpls bfd enable
By default, MPLS BFD is
disabled.
3. Enable periodic LSP
traceroute for an
FEC.
mpls periodic-tracert dest-addr mask-length
[ -a source-ip | -exp exp-value | -h ttl-value |
-m wait-time | -rtos tos-value | -t time-out | -u
retry-attempt | fec-check ] *
By default, periodic LSP
traceroute is disabled.
Configuring MPLS BFD for LSPs
To configure MPLS BFD for an LSP, configure both the local and remote devices as described in Table 3.
Table 3 Configurations on the local and remote devices
BFD session
establishment
mode
Node type
Execute the "mpls bfd
enable" command?
Execute the
"mpls bfd"
command?
Configure the
discriminator keyword?
Static mode
Local Yes Yes Yes
Remote Yes Yes Yes
Dynamic mode
Local Yes Yes No
Remote Yes No N/A
Follow these guidelines to configure BFD for an LSP tunnel:
• To establish the BFD session in static mode, make sure the local discriminator and remote
discriminator configured on the local device are the same as the remote discriminator and local
discriminator configured on the remote device.
• The source address of the BFD session is the MPLS LSR ID of the local device. Before configuring BFD
for the LSP tunnel, configure an MPLS LSR ID for the local device and make sure a route is available
on the remote device to reach the MPLS LSR ID.
• If multiple LSPs exist for an FEC, you can either create a BFD session for an LSP by specifying the
next hop of the LSP or create a BFD session for each LSP without specifying a next hop.
• On a BFD session established in static mode, the ingress node and egress node both operate in
active mode. On a BFD session established in dynamic mode, the egress node operates in active
mode and the ingress node operates in passive mode. Executing the bfd session init-mode
command on the ingress or egress node does not change the node operating mode.