06-14-2013 07:47 AM - edited 03-04-2019 08:12 PM
Hi,
We have a few Hub offices A and B running on MPLS (eBGP) with the provider and other branch offices C and D running on OSPF (IPSEC over Internet). A new MPLS site came up, E, but it has not internet connection yet. I'm trying to make this site reachable to the OSPF offices. I redistributed the route learnt via BGP for the new office into OSPF and it is being learnt too. I just cant seem to forward traffic to it. The trace just shows traffic reaching the main hub office but going nowhere after that.
So basically, E is reachable from A and B over MPLS. A and B are reachable to C and D over OSPF. But E is not reachable to C and D.
Also, the reverse is working. From E, I can reach C and D. Traffic comes to A and then goes out through the Tunnels. In the forward, from C and D, traffic comes to A and then nothing happens.
What could be wrong? Please help.
06-14-2013 08:25 AM
Hello
Could you post a simple topology so I can and maybe others can visualize the setup?
res
Paul
Please don't forget to rate any posts that have been helpful.
Thanks.
06-14-2013 08:35 AM
Simple topology attached
06-14-2013 08:43 AM
Hello
Can you see Hubs E routes in OSPF?
Would post the route table for this and maye some trace routes
res
Paul
Please don't forget to rate any posts that have been helpful.
Thanks.
06-14-2013 08:45 AM
C and D have visbility of A and B subnets because they all participate in OSPF. C and D have no vsibility of E subnet because E does not participate in OSPF. What you would need to do is allow for redistribution between OSPF and BGP. In your diagram do A and B represent a site or a single device? i.e. at site A and B do you have 1 router doing both BGP and OSPF or mutliple routers?
06-14-2013 12:00 PM
I now added static route on C and D for E's subnet. It points to the tunnel which C and D have with A. Even now, it doesnt go ahead than A.
To answer your questions:
@pdriver: yes, I could
@mfurnival: Both A and B have one router which do both OSPF and BGP. A and B are different sites on the MPLS. they are running BGP with the provider router and learning each other's as well as E's routes through the BGP with the provider.
06-14-2013 02:37 PM
Another update: I added a static route for C, on A's GRE Tunnel interface (ip route
06-14-2013 04:26 PM
Hello
You haven't posted any routes table outputs to understand the reachability but if if now works congratulations - I guess adding the statics
Established connectivity
Res
Paul
Sent from Cisco Technical Support iPad App
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