Issue in Tunnel re-establishment

Unanswered Question
Nov 22nd, 2009


I successfully establised the IPsec between 2 end points which consistes of ASA followed by a router on both ends. Then i configured the GRE Tunnel between 2 end and configured OSPF. No problem in OSPF Neighbour formation. But, couple of issues

  1. When the Router reloads then the GRE is not establishing unless i execute the "clear xlate" on the ASA. when i clear the tunnel everything is working fine. Tunnel is back to normal
  2. Inorder to overcome the above issue I change the default tunnel mode to "tunnel mode ipip" in the GRE Tunnel configuration. The tunnel is reestablishing automatically when the router reloads and i dont have to clear the tunnel. But the OSPF is not working when "tunnel mode ipip" in the GRE Tunnel configuration is used.

What could be the reason that the tunnnel is not reestablishing automatically.If i could solve this issue then i dont have to worry about "tunnel mode ipip" in the GRE Tunnel configuration beacause its additional problem.

What could be the reason for this



I have this problem too.
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Alexander Hartmaier Mon, 11/23/2009 - 08:21

Have you configured gre keepalives on the two routers?

lmanavalan Mon, 11/23/2009 - 14:10


I have configured the GRE Keepalives "keepalive 1 10"



Alexander Hartmaier Tue, 11/24/2009 - 06:57

Try to increase the keepalive period, every second is a bit often.


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Posted November 22, 2009 at 2:03 PM
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