WB1 7.9 iBGP Confederation

• Configure a BGP Confederation Sub-AS between R1, R4, and R6 as follows:
o Use the Sub-AS number 65146.
o Use the Public AS number 100.
o Configure full-mesh peerings between R1, R4, and R6.
o R4 and R6 should peer with BB3 and BB1 respectively.

• Configure a BGP Confederation Sub-AS between R3, SW1, and SW3 as follows:
o Use the Sub-AS number 65379.
o Use the Public AS number 100.
o Configure full-mesh peerings between R3, SW1, and SW3.

• Configure a BGP Confederation Sub-AS between R5, SW2, and SW4 as follows:
o Use the Sub-AS number 65508.
o Use the Public AS number 100.
o R5 should be a route-reflector, and peer with SW2 and SW4.
• R1, R3, and R5 should all peer with each other in a full-mesh.
• Configure EBGP peerings between R2 & R3 and R2 & R5.
• Advertise the Loopback 0 interfaces of all devices into BGP.
• Ensure full reachability to these Loopback 0 interfaces from all internal devices, and to all prefixes learned from AS 54 and 254 from all internal devices when sourcing traffic from the Loopback 0 interfaces.

Configuration

R1:
router bgp 65146
bgp confederation identifier 100
bgp confederation peers 65379 65508
network 150.1.1.0 mask 255.255.255.0
neighbor 155.1.0.5 remote-as 65508
neighbor 155.1.13.3 remote-as 65379
neighbor 155.1.146.4 remote-as 65146
neighbor 155.1.146.6 remote-as 65146

R4:
router bgp 65146
bgp confederation identifier 100
network 150.1.4.0 mask 255.255.255.0
neighbor 155.1.146.1 remote-as 65146
neighbor 155.1.146.6 remote-as 65146
neighbor 204.12.1.254 remote-as 54

R6:
router bgp 65146
bgp confederation identifier 100
network 150.1.6.0 mask 255.255.255.0
neighbor 54.1.1.254 remote-as 54
neighbor 155.1.146.1 remote-as 65146
neighbor 155.1.146.4 remote-as 65146

R3:
router bgp 65379
bgp confederation identifier 100
bgp confederation peers 65146 65508
network 150.1.3.0 mask 255.255.255.0
neighbor 155.1.0.5 remote-as 65508
neighbor 155.1.13.1 remote-as 65146
neighbor 155.1.23.2 remote-as 200
neighbor 155.1.37.7 remote-as 65379
neighbor 155.1.79.9 remote-as 65379
SW1:
router bgp 65379
bgp confederation identifier 100
network 150.1.7.0 mask 255.255.255.0
neighbor 155.1.37.3 remote-as 65379
neighbor 155.1.79.9 remote-as 65379
SW3:
router bgp 65379
bgp confederation identifier 100
network 150.1.9.0 mask 255.255.255.0
neighbor 155.1.37.3 remote-as 65379
neighbor 155.1.79.7 remote-as 65379

R5:
router bgp 65508
bgp confederation identifier 100
bgp confederation peers 65146 65379
network 150.1.5.0 mask 255.255.255.0
neighbor 155.1.0.1 remote-as 65146
neighbor 155.1.0.2 remote-as 200
neighbor 155.1.0.3 remote-as 65379
neighbor 155.1.58.8 remote-as 65508
neighbor 155.1.58.8 route-reflector-client
neighbor 155.1.108.10 remote-as 65508
neighbor 155.1.108.10 route-reflector-client
SW2:
router bgp 65508
bgp confederation identifier 100
network 150.1.8.0 mask 255.255.255.0
neighbor 155.1.58.5 remote-as 65508

SW4:
router bgp 65508
bgp confederation identifier 100
network 150.1.10.0 mask 255.255.255.0
neighbor 155.1.58.5 remote-as 65508

R2:
router bgp 200
network 150.1.2.0 mask 255.255.255.0
neighbor 155.1.0.5 remote-as 100
neighbor 155.1.23.3 remote-as 100
neighbor 192.10.1.254 remote-as 254
neighbor 192.10.1.254 password CISCO