I'm afraid you will have to give a lot more information. You are really giving us nothing to work on.
We need to know what are the addresses you are using, what address you are pinging from, what address you are pinging to, the show ip bgp from each router, and preferably also the configurations of all three routers.
Router A- S0/0- 10.1.1.1/24
Router B- S0/0- 10.1.1.2/24
Router B- S0/1- 184.108.40.206/24
Router C- S0/1- 220.127.116.11/24
1. A is connected to B & B is connected to C.
2. In show IP BGP on Router A, I am seeing advertised routes of C.
3. In show IP BGP on Router C, I am seeing advertised routes of A.
4. So there is no problem in the BGP configuration and is working OK. MY only question is , I am unable to ping Router A IP- 10.1.1.1 from C. Same is from C to A.
You will probably not have "next-hop-self" configured for the B to A iBGP peer, since B-C is eBGP peer, then the next hop would be C address.
What routers are advertising 10.1.1.0/24 and 18.104.22.168/24?
Give us a show ip bgp from A/B/C.
I have configured Next-Hop-Self & no problem in the configuration.
Tell me one thing, Is it possible to ping those ebgp routers who are not directly connected?
Well, aslong as you have the route for it installed in the routing table!
On A, when you do show ip bgp, do you see the network 22.214.171.124/24 via B?
Give us the show ip bg from A and C please.
Yes it sounds like it,
You do not have to config static routes, instead on B just configure 10.1.1.0 mas 255.255.255.0 and 126.96.36.199 mas 255.255.255.0
This will advertise the 188.8.131.52 net to A and the 10.1.1.0 net to C, so that they will have route to one another.
HI Rupeesh, [Pls RATE all informative POST]
If you have configured the BGP Neigbor relationship with the Loopback IP @ Address ensure to add "update-source Loopback0" in the Configuration.
If you have established the E-BGP connection with non-directly connected interface, in this situation, use ebgp-multihop command
Your Router A & Router B Configuration should look like this:
Write a STATIC Route for the Loopback Interface pointing to your WAN Interface.
int loopback 0
ip address 184.108.40.206 255.255.255.0
router bgp 100
neighbor 220.127.116.11 remote-as 200
neighbor 18.104.22.168 ebgp-multihop
neighbor 22.214.171.124 update-source loopback 0
ip route 126.96.36.199 255.255.0.0 188.8.131.52
ip route 184.108.40.206 255.255.0.0 220.127.116.11
int loopback 0
ip address 18.104.22.168 255.255.255.0
router bgp 200
neighbor 22.214.171.124 remote-as 100
neighbor 126.96.36.199 update-source loopback 0
neighbor 188.8.131.52 ebgp-multihop
ip route 184.108.40.206 255.255.0.0 220.127.116.11
ip route 18.104.22.168 255.255.0.0 22.214.171.124
Guru Prasad R