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