Enable BFD Sessions for a BGP Peer Group

Create a peer group.

device(config-bgp-router)# neighbor pg1 peer-group

Enable BFD sessions for the peer group.
```
device(config-bgp-router)# neighbor pg1 bfd
```
To specify the transmit time, the receive time, and the number of consecutive control packets that must be missed before the connection to a peer is considered non-operational:
```
device(config-bgp-router)# neighbor pg1 bfd interval 200 min-rx 220 multiplier 25
```
For peer group 1, this example specifies a transmit interval of 200 ms, the min-rx keyword followed by a receive interval of 220 ms, and the multiplier value of 25, which indicates that 25 consecutive packets must be missed before the connection to the peer is considered non-operational.
To specify the interval after which BGP routes are withdrawn after a BFD session is declared down:
```
device(config-bgp-router)# neighbor pg1 bfd holdover-interval 17
```
For peer group 1, this example specifies a holdover interval of 17 seconds.