Dynamic vpn change ip address issue

[soufiane.Max]

hello.

I have two routers one with static ip address ( Router A ) and one with dynamic ip address.( Router B )

I i setted up a dynamic crypto map on my router A. all is working fine. But when the router B change the ip address after some hours. He can't send traffic when i do sho crypto isakmp sa. I see a tunnel up but no traffic.

I thing a it s ghost tunnel  when i clear the vpn session vpn come back again and work fine until the ip change. 

Please do you have a solution to this issue ??

Best regards.

[MHM Cisco World · Accepted solution]

Config keepalivr in peer with dynamic map,

This will make it detect other peer is gone and peer with new ip can establish new isakmp.

[soufiane.Max]

it worked like a charm but i setted on the both router A and B .

Thank you 

[Flavio Miranda]

Hi 

 What you can do is run a EEM script to restart the tunnel time to time. Better if you know the lease time. 

You can also use FQDN tunnel but you may need some openDNS to track your IP and monitor de IP changes.