Form BGP neighbor

acbenny · ‎08-25-2008

Hi all,

Any one if if i can use virtual to form bgp neighbor ?

interface Port-channel1

ip address 192.168.1.2 255.255.255.192

standby 1 ip 192.168.1.1

router bgp xyz

no synchronization

bgp router-id 192.168.1.1

Calin C. · ‎08-25-2008

Hi there!

I believe that it is possible.

Under the router bgp x you have to specify:

neighbor "peer_IP_virtual_intf" remote-as "x"

neighbor "peer_IP_virtual_intf" update-source "local_IP_virtual_intf"

of course you have to have some dynamic routing protocol or static routing to reach "peer_IP_virtual_intf"

Good luck!

Cheers,

Calin

Giuseppe Larosa · ‎08-25-2008

Hello Jack,

for BGP the better solution is to use loopback addresses as BGP endpoints.

using an HSRP VIP could be possible but when HSRP changes state the session has to be negotiated again.

Two established peers exchange only BGP keepalives: when HSRP changes states the new Active router will receive BGP keepalives for a session that it is trying to negotiate.

So it can take some time: BGP is has a neighbor state machine is not plug and play.

I think it is better to have two BGP sessions terminated on loopbacks.

Hope to help

Giuseppe