BGP Routing Clarification

[Pankaj88]

Hi All,

Merry X'mas to all, I have a roadblock on a basic BGP config, request your help in troubleshooting this issue as why R3 is not able to ping R1's loopback. I am trying the solution without IGP/BGP redistribution.

Topology:

R1 ---eBGP ----R2---iBGP----R3
** Loopbacks between R2 and R3 are reachable over OSPF

R3 is receiving loopback ip 1.1.1.1 of R1
R3#sh ip bgp 1.1.1.1
BGP routing table entry for 1.1.1.1/32, version 43
Paths: (1 available, best #1, table default)
Not advertised to any peer
1
2.2.2.2 (metric 3) from 2.2.2.2 (2.2.2.2)
Origin IGP, metric 0, localpref 100, valid, internal, best
R3#
but when I attempt to ping 1.1.1.1 from R3 with source as its own loop back

R3# ping 1.1.1.1 source lo0

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
Packet sent with a source address of 3.3.3.3
U.U.U
Success rate is 0 percent (0/5)

R1 has learnt the loopback IP of R3 from R2 with next-hop-self command.
R1#sh ip route 3.3.3.3
Routing entry for 3.3.3.3/32
Known via "bgp 1", distance 20, metric 0
Tag 2, type external
Last update from 2.2.2.2 00:17:22 ago
Routing Descriptor Blocks:
* 2.2.2.2, from 2.2.2.2, 00:17:22 ago
Route metric is 0, traffic share count is 1
AS Hops 1
Route tag 2
MPLS label: none
R1#