I have (in GNS3) three Cisco 3640s running 12.4(23) connected in series (R1 -> R2 -> R3). R1 and R2 are eBGP peers, R2 and R3 are iBGP peers. R1 advertises network 192.168.1.0/24. R2 receives this route, but does not advertise it to R3.
Shouldn't routes learned from eBGP be advertised to iBGP?
Here's the full configuration as entered:
loop0(R1)s0/0 <--> s0/0(R2)s0/1 <--> s0/1(R3) R1: configure terminal interface s0/0 ip address 172.16.1.1 255.255.255.252 no shutdown interface loopback0 ip address 192.168.1.1 255.255.255.0 router bgp 1 neighbor 172.16.1.2 remote-as 2 network 192.168.1.0 mask 255.255.255.0 R2: configure terminal interface s0/0 ip address 172.16.1.2 255.255.255.252 no shutdown interface s0/1 ip address 172.16.1.5 255.255.255.252 no shutdown router bgp 2 neighbor 172.16.1.1 remote-as 1 neighbor 172.16.1.6 remote-as 2 R3: configure terminal interface s0/1 ip address 172.16.1.6 255.255.255.252 no shutdown router bgp 2 neighbor 172.16.1.5 remote-as 2