DMVPN Trouble

Unanswered Question

Hi, I've deployed Dynamic Multipoint VPN (DMVPN) technology with one Hub (7206VXR GP2) and one Spoke (C2801) each one have a Tunnel0 interface and use EIGRP to pass route back and forth… When the DMVPN interfaces were configured and NHRP registration occurred, all looked good but within 10 sec, randomly it down and up again, the output console logs indication of failure is the EIGRP neighbor down. Can someone help me? I've done everything but the problem steel remaining. Thanks

I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
singhsaju Fri, 08/08/2008 - 07:33


Can you post configuration from both sides ?

Also post show crypto ipsec sa , show crypto isakmp sa .

what do you see in logs of the routers ?

I'm sorry for the inconvenience, but I have resolved the problem creating a new EIGRP autonomous system on Hub and adding a network using wild card mask.

router eigrp 100

redistribute static



no auto-summary

### new router autonomous system ####

router eigrp 90


no auto-summary

Other trouble that I had was that RDP (think client) on the “spoke” side can't connect to a RDP Server. I've corrected it modifying the MTU and mss values.

Interface Tunnel0

ip mtu 1372

ip tpc adjust-mss 1332

Once again, thanks for answer me..


This Discussion