H3C S6550X-HI Series Command Reference Manual page 1992

Syntax
fast-reroute
route-policy-name }
undo fast-reroute
Default
OSPFv3 FRR is disabled.
Views
OSPFv3 view
Predefined user roles
network-admin
Parameters
: Uses the LFA algorithm to calculate backup next hops.
lfa
: Uses the next hop of the route to the ABR as the backup next hop.
abr-only
ecmp-shared
ECMP routes. ECMP routes share one backup next hop. If you do not specify this keyword, OSPFv3
calculates a backup next hop through LFA calculation only for non-ECMP routes.
route-policy route-policy-name
The route-policy-name
Usage guidelines
Do not use the
To calculate a shared backup next hop through LFA calculation for ECMP routes with the same
destination address, execute this command with the
hops of all ECMP routes fail, OSPF uses the shared backup next hop to forward packets. The shared
backup next hop is flushed to the RIB as an ECMP route. The state of the route is ECMP-back in the
output from the
Examples
# Enable FRR to calculate backup next hops for all routes by using LFA algorithm in OSPFv3
process 1.
<Sysname> system-view
[Sysname] ospfv3 1
[Sysname-ospfv3-1] fast-reroute lfa ecmp-shared
fast-reroute tiebreaker
Use
fast-reroute tiebreaker
Use undo fast-reroute tiebreaker
Syntax
fast-reroute tiebreaker { lowest-cost | node-protecting } preference
preference
undo fast-reroute tiebreaker { lowest-cost | node-protecting }
Default
The priority values of the node-protection and lowest-cost backup path selection policies are 40 and
20, respectively.
{ lfa [ abr-only
: Calculates a backup next hop through LFA calculation for all routes, including
argument is a case-sensitive string of 1 to 63 characters.
fast-reroute lfa
display ospfv3 routing
| ecmp-shared
: Uses a routing policy to designate a backup next hop.
command together with the
ecmp-shared
command.
to set the priority for a backup path selection policy.
to restore the default.
58
] | route-policy
command.
vlink-peer
keyword specified. If the next