pic
Use pic to enable BGP FRR for a BGP address family.
Use undo pic to disable BGP FRR for a BGP address family.
Syntax
pic
undo pic
Default
BGP FRR is disabled.
Views
BGP IPv4 unicast address family view
BGP-VPN IPv4 unicast address family view
BGP IPv6 unicast address family view
BGP-VPN IPv6 unicast address family view
Predefined user roles
network-admin
Usage guidelines
FRR is used in a dual-homing network to protect a primary route with a backup route. It uses ARP (for IPv4), ND (for IPv6), or echo-mode BFD (for IPv4) to detect the connectivity of the primary route. When the primary route fails, BGP directs packets to the backup route.
After you enable FRR, BGP calculates a backup route for each BGP route in the address family if there are two or more unequal-cost routes to reach the destination.
You can also configure BGP FRR by using the fast-reroute route-policy command, which takes precedence over the pic command. For more information about routing policies, see Layer 3—IP Routing Configuration Guide.
Use the pic command with caution because it might cause routing loops in specific scenarios.
Examples
# Enable BGP FRR in BGP IPv4 unicast address family view.
<Sysname> system-view [Sysname] bgp 100 [Sysname-bgp-default] address-family ipv4 unicast [Sysname-bgp-default-ipv4] pic
Related commands
fast-reroute route-policy