WB1 7.15 BGP Peer Groups

• Configure BGP on all internal devices, with the exception of R2 and all switches, using AS 100.
• Configure iBGP peerings from R1 to all other devices in AS 100 using the peer group named IBGP_PEERS, be sure to use the Loopback 0 of these devices to form the peerings.
• Configure EBGP peerings between R4 & BB3 and R6 & BB1 using their directly connected links; BB1 and BB3 are in AS 54.
• Advertise the Loopback 0 interfaces of all devices into both IGP and BGP.
• Ensure full reachability to the Loopback0 interfaces from all internal devices, and to all prefixes learned from AS 54 and AS 254 from all internal devices when sourcing traffic from the Loopback0 interfaces.
 
Configuration
 
neighbor <PEER_GROUP_TAG> peer-group
 
and then applying all BGP settings to the named tag like if it was a regular BGP peer.
When you’re done with the peer-group configuration, you assign BGP peers to the group using the command
 
neighbor <IP_Address> peer-group <PEER_GROUP_TAG>

R1:
router bgp 100
neighbor IBGP_PEERS peer-group
neighbor IBGP_PEERS remote-as 100
neighbor IBGP_PEERS update-source Loopback0
neighbor IBGP_PEERS route-reflector-client
neighbor 150.1.3.3 peer-group IBGP_PEERS
neighbor 150.1.4.4 peer-group IBGP_PEERS
neighbor 150.1.5.5 peer-group IBGP_PEERS
neighbor 150.1.6.6 peer-group IBGP_PEERS
network 150.1.1.0 mask 255.255.255.0
!
router eigrp 100
network 150.1.1.1 0.0.0.0