BGP and Loopback

[CISCOLOG]

Hello,

I was able to reach ank_linux computer from ist_linux computer, I created loop back interface on both routers, now I can't reach ank_linux computer from ist_linux computer

any suggestions?

[MHM Cisco World]

all config is correct 
except ANK-SW dont have default route, which I thing you config but you missing add it to photo.
if Yes then 
show tcp brief <<- in both BGP peer
and 
traceroute from server to server <<- share the result here

MHM

[CISCOLOG]

Hello,
yes ank-sw have default route

I can reach ANK_LINUX computer from IST_RT router but I cannot reach ANK_LINUX computer from IST_SW, so these networks can be reached from routers but not from switches


IST_RT(config)#do sh tcp brief
TCB Local Address Foreign Address (state)
0F5966B8 10.10.10.10.53209 20.20.20.20.179 ESTAB

ANKARA_RT(config)#do sh tcp brief
TCB Local Address Foreign Address (state)
10DA5560 20.20.20.20.179 10.10.10.10.53209 ESTAB

IST_SW#traceroute 172.16.10.254
Type escape sequence to abort.
Tracing the route to 172.16.10.254
VRF info: (vrf in name/id, vrf out name/id)
1 192.168.1.2 17 msec 9 msec 5 msec
2 * * *
3 * * *
4 * * *
5 * * *
6 *

[MHM Cisco World · Accepted solution]

how can I dont see that in first place there is not issue in BGP

you use same subnet connect BGP peer to L3SW (in both site)
192.168.1.0/30 
change one subnet and you will success to connect

MHM

[Harold Ritter · Accepted solution]

Hi @CISCOLOG ,

Can you try traceroute from IST_SW, but using g0/1 as the source address.

traceroute 172.16.10.254 source 192.168.10.1

Regards,

[CISCOLOG]

I missed something, now the problem is solved thank you for your help
MHM and Herold Ritter

Regards,