Hello Georg,   Looks like this Bug ID is different issue. Can you cross check the Bug ID. Thanks! ... View more

Hello Georg,   Could you please confirm Bug ID for the below statement:   "there is a bug in 15.2 where 'if-state nhrp' configured on the tunnel interface keeps the NHRP registration to never finish" ... View more

Ok Sure.   Thanks for prompt reply Geaorg. ... View more

It didn't helped. I have already tried. Thanks! ... View more

Hello Georg,   Solution is appreciated but we cannot stop ISP outages.   Anyways i came to know that IOS currently running in Spoke is 15.2(1)T2.1 - 3925 router.   Whether it would be the issue? Any known bug in this version? ... View more

Hello Georg,   Thanks for the solution.   This is temporary solution right? Is there any other particular reason for this issue? Because we are seeing this issue in few more spoke as well.   Thanks in advance.   Regards, Chandhuru Chandhuru ... View more

Hello Georg,   Thanks for your reply.   I guess DMVPN will not support keep alive right ???   Correct me if am wrong and also I read one article from cisco stated that keepalive will not be effect when there is a vrf in place.    Could you please clarify me???   Regards, Chandhuru ... View more

Hello,   Thanks for your reply.   I can try to explain you in more details.   We have two HUB routers and multiple Spokes routers. In all spokes we have single ISP connection and single Tunnel interface, within Tunnel interface we have created sub tunnel to connect HUB1 and HUB2.   Hope you have cleared.   My problem is when ISP has flapped at Spoke end. Only Tunnel2 which connecting to HUB2 not establishing.    DMVPN routed via BGP routing protocol.   Please suggest your opinions and let me know if you have any questions. Configs of HUB2 and Spoke which is having issue is posted already in previous post. Thanks!   Regards, Chandhuru ... View more

Hello Georg,   Thanks for your reply.   I guess DMVPN will not support keep alive right ???   Correct me if am wrong and also I read one article from cisco stated that keepalive will not be effect when there is a vrf in place.    Could you please clarify me???   Regards, Chandhuru ... View more

Yes. As I said earlier, this problem occurs only when ISP goes down and coming back.    Post ISP came back online only one tunnel become live another one is down. Second one also will come online unless until bounce the tunnel interface.    Please suggest your comments.   Regards, Chandhuru ... View more

Hello , Yes ISP dropped and Tunnel 1 back online but only Tunnel2 come up. That is the question here. I mean Tunnel 2 at Spoke end not back online. ... View more

Any update? ... View more

Yes Georg.   When DMVPN Tunnel going down. BGP neighbor also going down. ... View more

Hello Georg,   There is no specific logs related to it. Just the log stating that "Neighbor 10.XX.XX.2 is Up"   We are seeing this issue only happening between DC2 Hub to the Spoke.   I mean not only this Spoke few other spoke also same problem. Some of the cases it become Up by itself few cases need to shut and no shut Tunnel at Spoke end to regain connectivity.    In this scenario, what would be the probable cause. any hold on timer issue or something else.   Any guess? that would be helpful for me to troubleshoot further.   Regards, Chandhuru   ... View more

Thanks for your reply Georg!   I guess you did misunderstood. only one spoke and two hubs.   DC1 ----------> Spoke1 DC2 ----------> Spoke1   One more thing. We have shut and no shut the tunnel at Spoke end has fixed this issue. Could you please clarify what will be the issue?   Regards, Chandhuru ... View more