Administrator Guide

1418 BGP
R3(config)#router bgp 5500
R3(config-router)#bgp log-neighbor-changes
7 The router ID is required.
R3(config-router)#bgp router-id 11.11.11.11
8 Set the listen range to the local routed interface subnet and use template
T1.
R3(config-router)#bgp listen range 192.168.100.0/24 inherit
peer T1
9 Configure template T1 to indicate an IGP peer.
R3(config-router)#template peer T1
R3(config-router-tmp)#remote-as 5500
R3(config-router-tmp)#exit
R3(config-router)#exit
R3(config)#exit
10 Display the dynamic neighbors.
R3#show ip bgp listen range
Listen Range .................................. 192.168.100.0/24
Inherited Template ............................ T1
Member ASN State
---------------- ----- -----------
192.168.100.10 5500 ESTABLISHED
IPv6 Source Address Selection
When BGP initiates a TCP connection to a peer, it selects a source IPv6
address. When the user has configured a source interface (using neighbor
update-source), the source address is taken from this interface. When the
peer's IPv6 address is a link local address, the local interface used to reach the
peer is configured (in neighbor remote-as) and the source address is taken
rom this interface.
If the neighbor address is a link local address, BGP selects a link local address
as the source address. Otherwise, BGP selects a local address in the same
subnet as the neighbor's address. If no such address is found, BGP selects the
first active global IPv6 address on the source interface.