12-21-2011 09:56 PM - last edited on 03-25-2019 03:34 PM by ciscomoderator
Dear all,
I have configured 5 routers in same AS using IBGP in my branch. whenever i trace the last one, it directly shows the router without showing the remaining hops. How can i get the solution for viewing each hops in same IBGP routers. is there any option in BGP for the matter?
Any help will be highly appreciated.
12-21-2011 09:59 PM
Hi Hari,
Your question is not clear.
Can you please attach the topology and reframe your concern for better understanding.
Also, as far as I have understood (correct me, if I'm wrong); you have 5 routers at one branch, which are fully meshed with iBGP.
Regards,
Smitesh
12-21-2011 10:06 PM
Hi smitesh!
thank you for your quick reply.
Yes, I have 5 routers in same branch using IBGP in fully mesh. I tried to
trace the last router from HO, but it showed me up the last router directly
without showing the rest routers (hops). If it doesn't make any sense
please let me know, i will try to make a design according the scenario.
Regards,
Hari
On Thu, Dec 22, 2011 at 11:45 AM, smitesh.kharecha <
12-21-2011 10:08 PM
Hi Hari,
Can you please attach topology.
Regards,
Smitesh
12-22-2011 12:32 AM
Dear Smitesh
Thank you for your further interest towards my question.
I have attached the topology here,
In this topology i have included 4 routers in branch... if you provided me
the solution for those routers 5th router is not the issue.
Actually i'm tracing R4 from HO which you can see in the topology, in this
type of topology my HO router shows the ISP as the first hop then it shows
directly R4 , it is reachable but trace is hiding 3 routers R1,R2, and R3.
So, i want to see these hops as well.
For your information ,
OSPF and IBGP full mesh is running between R1,R2,R3 and R4, likewise eBGP
is running between HO-SP-R1.
I hope this scenario does make sense.
Regards,
Hari
On Thu, Dec 22, 2011 at 11:53 AM, smitesh.kharecha <
12-22-2011 12:52 AM
Hi Hari,
Sorry, but i still have couple of more doubts on the setup.
1. The attached topology is physical or logical ?
2. Just to confirm is iBGP fully meshed. i.e. R1 has got R2, R3, R4 as neigbours
also R2 has got R1, R3, R4 as neighbours
also R3 has got R1, R2, R4 as neigbours
also R4 has got R1, R2, R3 as neighbours
3. Have you deployed any route-reflector ?
4. Is R1 the only point of entrance in the AS ?
5. Is BGP syncronization enabled or diabled ?
6. The route which you are trying to reach, whether or R4 or R5; are you seeing that route on R1 as BGP learn route or OSPF ? (Which I believe should be OSPF)
7. Are you doing redistribution between OSPF and BGP ?
Regards,
Smitesh
12-22-2011 01:19 AM
Dear Smitesh,
Its ok , Please check my answer and consider these informations are true.
1. The attached topology is physical or logical ?
Its physical topology
2. Just to confirm is iBGP fully meshed. i.e. R1 has got R2, R3, R4 as
neigbours
also R2 has got R1, R3, R4 as neighbours
also R3 has got R1, R2, R4 as neigbours
also R4 has got R1, R2, R3 as neighbours
Yes you are right.
3. Have you deployed any route-reflector ?
No
4. Is R1 the only point of entrance in the AS ?
Yes
5. Is BGP syncronization enabled or diabled ?
It has been disabled
6. The route which you are trying to reach, whether or R4 or R5; are you
seeing that route on R1 as BGP learn route or OSPF ? (Which I believe
should be OSPF)
Both BGP and OSPF learning the route. But internally ospf works for the
reachability what i believe. routes learned by BGP are seen as rib failure.
that means router 1 is using ospf to reach r4 even it has that route in bgp
table also.
7. Are you doing redistribution between OSPF and BGP ?
no i'm advertising the specific routes in the bgp.
Kind Regards,
Hari
12-24-2011 09:22 PM
Dear Smitesh
No response received yet, please help me out as soon as possible.
On Thu, Dec 22, 2011 at 3:03 PM, Hari bamsha Sapkota <
12-25-2011 08:38 PM
Hi Hari,
I was out on project for couple of days and I wonder no other community member had ventured on this thread so fa r .
Anyways, can you share the sanitised configs of all the routers involved, so that I can try to simulate the issue in GNS3.
Regards,
Smitesh
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide