H3C Technologies H3C S6800 Series Switches - Manual (Page 428)

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• 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's operating mode.
To configure BFD for LSPs:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable BFD for MPLS. mpls bfd enable
By default, BFD for MPLS is
disabled.
3. Configure BFD to verify LSP
connectivity for an FEC.
mpls bfd dest-addr mask-length
[ nexthop nexthop-address
[ discriminator local local-id
remote remote-id ] ] [ template
template-name ]
By default, BFD is not configured to
verify LSP connectivity for an FEC.
Configuring periodic MPLS tracert for LSPs
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable BFD for
MPLS.
mpls bfd enable
By default, BFD for MPLS is
disabled.
3. Enable periodic LSP
tracert 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 tracert is
disabled.
Configuring MPLS OAM for MPLS TE tunnels
MPLS OAM only supports BFD for MPLS TE tunnel connectivity verification.
To run BFD on an MPLS TE tunnel, configure both the local and remote devices as described in
Table 37 .
Table 37 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 MPLS TE tunnel: