BGP route inaccessible

[KiranMalla]

Hi Team, 

I have configured the routers in attached format. I could not able to access the internal networks of R4 router from R1. I could the see the routes advertised in the router but not able to ping.

RTR#1:

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
10.10.1.2 4 600 103 99 9 0 0 01:34:52 4
192.168.1.2 4 500 100 100 9 0 0 01:34:51 6

Network Next Hop Metric LocPrf Weight Path
*> 172.21.41.0/24 0.0.0.0 0 32768 i
*> 172.21.42.0/24 0.0.0.0 0 32768 i
* i172.21.43.0/24 10.10.2.2 0 100 0 600 i
*> 10.10.1.2 0 0 600 i
* i172.21.44.0/24 10.10.2.2 0 100 0 600 i
*> 10.10.1.2 0 0 600 i
*>i172.21.45.0/24 192.168.1.2 0 100 0 i
*>i172.21.46.0/24 192.168.1.2 0 100 0 i
* i172.21.47.0/24 10.10.2.2 0 100 0 600 i
*> 10.10.1.2 0 600 i
* i172.21.48.0/24 10.10.2.2 0 100 0 600 i
*> 10.10.1.2 0 600 i

Please help me on how to access the networks 172.21.47.0/24 & 172.21.48.0/24 from R1. 

[KiranMalla]

Hi @Harold Ritter , thank you for the clarification. I have configured next-hop self on R1 to R2 & R3 to R4 and it is started reaching the remote networks. Do we have any rules to identify where we need to write these next-hop-self in case we have multiple routers on the network ?

[Harold Ritter]

Hi @KiranMalla ,

The general rule is that you need to use next-hop-self command whenever you advertise prefixes received from an eBGP neighbor to an iBGP neighbor, unless you redistribute the subnet used for eBGP in your IGP.

Regards,

[MHM Cisco World]

do hard reset and try again, 
hard reset 

clear ip bgp x