fast-reroute
Use fast-reroute to configure IS-IS FRR.
Use undo fast-reroute to disable IS-IS FRR.
Syntax
fast-reroute { lfa | route-policy route-policy-name }
undo fast-reroute
Default
IS-IS FRR is disabled.
Views
IS-IS IPv4 unicast address family view
Predefined user roles
network-admin
Parameters
lfa: Calculates a backup next hop through Loop Free Alternate (LFA) calculation for all routes.
route-policy route-policy-name: Uses the specified routing policy to designate a backup next hop. The route-policy-name argument is a case-sensitive string of 1 to 63 characters.
Usage guidelines
The LFA calculation of FRR and IS-IS TE are mutually exclusive.
Example
# Enable FRR for IS-IS process 1 and configure IS-IS FRR to calculate a backup next hop through LFA calculation for all routes.
<Sysname> system-view [Sysname] isis 1 [Sysname-isis-1] address-family ipv4 [Sysname-isis-1-ipv4] fast-reroute lfa