I have 2620XM router with IOS 12.2 with crypto feature set.
I want to enable keepalive on tunnel interface for the tunnel interface to go down incase of link failure.
The problem I have current IOS version doesn't support the keepalive command on Tunnel interface. I can't upgrade to newer version with this feature set due to memory limitation.
Is there a way I can achieve this functionality without having to upgrade router.
IOS version. C2600-IK9S-M ver 12.2(40a)
Memory 64 and Flash 16