Confederations
339
F I G U R E 9 . 3
A small confederation
To make this easy to understand, we'll do the configuration on all three
routers displayed above. First, let's take a look at the configuration of
RouterA in our confederation.
RouterA(config)#router bgp 1
RouterA(config-router)#bgp confederation identifier 31400
RouterA(config-router)#bgp confederation peers 2 3
RouterA(config-router)#neighbor 172.16.11.254 remote-as 2
RouterA(config-router)#neighbor 172.16.12.254 remote-as 3
Now let's look at RouterB's configuration.
RouterB(config)#router bgp 2
RouterB(config-router)#bgp confederation identifier 31400
RouterB(config-router)#bgp confederation peers 1 3
RouterB(config-router)#neighbor 172.16.10.254 remote-as 1
Confederation
AS 31,400
Router
AS
IP Address
RouterA
1
172.16.10.254
RouterB
1
172.16.11.254
RouterC
1
172.16.12.254
RouterA
RouterB
RouterC
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