Reference Guide

remote-as 102
!
Fast external fallover
Fast external fallover terminates EBGP sessions of any directly adjacent peer if the link used to reach the peer goes down. BGP does not
wait for the hold-down timer to expire.
Fast external fallover is enabled by default. To disable or re-enable it, use the [no] fast-external-fallover command. For the
fast-external-fallover command to take eect on an established BGP session, you must reset the session using the clear ip
bgp {* | peer-ipv4-address | peer-ipv6-address} command.
View fast external fallover conguration
OS10(config)# do show running-configuration bgp
!
router bgp 300
!
neighbor 3.1.1.1
remote-as 100
no shutdown
!
neighbor 3::1
remote-as 100
no shutdown
!
address-family ipv6 unicast
activate
OS10(config)# interface ethernet 1/1/1
OS10(conf-if-eth1/1/1)# show configuration
!
interface ethernet1/1/1
ip address 3.1.1.3/24
no switchport
no shutdown
ipv6 address 3::3/64
OS10(conf-if-eth1/1/1)# shutdown
OS10(conf-if-eth1/1/1)# do commit
OS10(conf-if-eth1/1/1)# do show ip bgp summary
BGP router identifier 11.11.11.11 local AS number 300
Neighbor AS MsgRcvd MsgSent Up/
Down State/Pfx
3.1.1.1 100 6 6
00:00:15 Active
3::1 100 8 11
00:00:15 Active
OS10(conf-if-eth1/1/1)#
View fast external fallover unconguration
OS10(config-router-bgp-300)# do show running-configuration bgp
!
router bgp 300
no fast-external-fallover
!
neighbor 3.1.1.1
remote-as 100
no shutdown
!
neighbor 3::1
remote-as 100
no shutdown
!
address-family ipv6 unicast
activate
208
Layer 3