BGP Routes not in Routing Table

[Mantas Sti]

All 3 routers are running BGP. I have only configured them with #neighbor x.x.x.x remote-as xxx command. Routers KCOM and CONNEXIN should have 1 BGP route each installed in their routing table but when I run #show ip bgp command, nothing comes up. Interfaces are configured with IP addresses and are on. I can ping KCOM and CONNEXIN routers from RTR-01.

[Peter Paluch]

Hi Mantas,

We need to understand more about your setup. Can you please post the complete output of the following commands from all three routers?

show ip bgp
show ip bgp summary
show run | section bgp

Thanks!

Best regards,
Peter

[Mantas Sti]

Hello.

I have just started learning BGP and want to really understand it. Managed to figure it out myself after spending 2 hours on this simple topology trying different commands. It's an awesome feeling to know stuff.

Thanks for your replies.

[Julio E. Moisa]

You are welcome my friend. 

We learn everyday.

:-)

[Julio E. Moisa · Accepted solution]

Hi

BGP will advertise the routes only if you are using network command line matching the subnet mask  and if the prefixes to be advertised are into the routing table. 

For example:

KCOM Router

interface loopback 0

ip address 151.1.1.1 255.255.255.255

router bgp 111

network 151.1.1.1 mask 255.255.255.255

neighbor 150.1.1.2 remote-as 500

In order to see the BGP peering status and amount of the prefixes received from a neighbor, you can use:

show ip bgp summary

and to see the BGP table:

show ip bgp

Regards.