H3C Technologies H3C S5560 Series Switches - Manual (Page 177)

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Configuring IS-IS FRR to automatically calculate a backup next
hop
Step Command Remarks
1. Enter system view. system-view N/A
2. Configure the source address
of echo packets.
bfd echo-source-ip ip-address
By default, the source address of
echo packets is not configured.
3. Enter IS-IS view.
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
N/A
4. Enable IS-IS FRR to
automatically calculate a
backup next hop.
fast-reroute auto By default, IS-IS FRR is disabled.
Configuring IS-IS FRR using a routing policy
You can use the apply fast-reroute backup-interface command to specify a backup next hop in a routing
policy for routes matching specific criteria. You can also perform this task to reference the routing policy
for IS-IS FRR. For more information about the apply fast-reroute backup-interface command and routing
policy configurations, see "
Configuring routing policies ."
To configure IS-IS FRR using a routing policy:
Step Command Remarks
1. Enter system view. system-view N/A
2. Configure the source address
of echo packets.
bfd echo-source-ip ip-address
By default, the source address of
echo packets is not configured.
3. Enter IS-IS view.
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
N/A
4. Enable IS-IS FRR using a
routing policy.
fast-reroute route-policy
route-policy-name By default, this feature is not
enabled.
Configuring BFD for IS-IS FRR
By default, IS-IS FRR does not use BFD to detect primary link failures. To speed up IS-IS convergence,
enable BFD single-hop echo detection for IS-IS FRR to detect primary link failures.
To configure BFD for IS-IS FRR:
Step Command Remarks
1. Enter system view. system-view N/A
2. Configure the source IP
address of BFD echo
packets. bfd echo-source-ip ip-address
By default, the source IP address of
BFD echo packets is not configured.
For more information, see High
Availability Command Reference.