Administrator Guide

CONFIG-ROUTERBGP mode

neighbor {ip-address | peer-group-name} no shutdown

5. Configure parameters for a BFD session established with all neighbors discovered by BGP. OR Establish a BFD session with a specified

BGP neighbor or peer group using the default BFD session parameters.

CONFIG-ROUTERBGP mode

bfd all-neighbors [interval millisecs min_rx millisecs multiplier value role {active |

passive}]

neighbor {ip-address | peer-group-name} bfd

NOTES:

• When you establish a BFD session with a specified BGP neighbor or peer group using the neighbor bfd command, the default

BFD session parameters are used (interval: 200 milliseconds, min_rx: 200 milliseconds, multiplier: 3 packets, and role: active).

• When you explicitly enable or disable a BGP neighbor for a BFD session with the neighbor bfd or neighbor bfd disable

commands, the neighbor does not inherit the BFD enable/disable values configured with the bfd all-neighbors command or

configured for the peer group to which the neighbor belongs. Also, the neighbor only inherits the global timer values configured

with the bfd all-neighbors command (interval, min_rx, and multiplier).

6. Repeat Steps 1 to 5 on each BGP peer participating in a BFD session.

Establishing Sessions with BGP Neighbors for Nondefault VRF

To establish sessions with either IPv6 or IPv4 BGP neighbors for nondefault VRFs, follow these steps:

1. Enable BFD globally.

CONFIGURATION mode

bfd enable

2. Specify the AS number and enter ROUTER BGP configuration mode.

CONFIGURATION mode

router bgp as-number

3. Specify the address family as IPv4.

CONFIG-ROUTERBGP mode

address-family ipv4 vrf vrf-name

4. Add an IPv4 BGP neighbor or peer group in a remote AS.