I have MPLS link between India and US. I have configured BGP. Beside this, I have created GRE tunnel on these two point and publishing few EIGRP routes on GRE tunnel. The problem is whenever my physical link on India side is down, it shut down the tunnel also on India end. But Tunnel on US end remains up. Due to this, traffic on US routers is still forwarding EIGRP traffic to India end. As a result, no data is reachable. Please help.
I believe Giuseppe understood you. What you might not realize, GRE tunnels, by default, are "UP" even when they have no good connection to the other side. Two solutions are, when running dynamic routing (e.g. EIGRP), the routing protocol will see the lost peer and should stop forwarding traffic (but as also noted by Giuseppe, this depends on the protocol timers), and/or, if supported by the platform, enable GRE tunnel keep alives (i.e. use the keepalive command on the tunnel interface - BTW, recall timers can also be adjusted for this command - one advantage of using keepalive, it takes the tunnel "DOWN", can be useful for SNMP polling).
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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