We have a customer with a DMVPN network. On some locations we have some issue where the IPsec/GRE tunnel to the headend is hanging from time to time (every two/trhree days) and no traffic can be pass through anymore. The solution is to restart the router and everything works again find.
We have configured crypto call admission limit ike in-negotiation-sa 10 as I have heard that too many IKE request can make the router to crash,
But have your guys any idea on what could cause the IPsec/GRE tunnel to hang?
Platform: Cisco 1812