Is there any way in IOS to use a ping to a specific IP address as a keepalive? I am trying to implement a failover between two ISP connections without using BGP. I want the connection to switch to the backup if Layer 3 reachibility is lost, not when the Layer1 or Layer2 link fails.
Incoming traffic is not important, so there is no need to announce a specific subnet. The outgoing traffic will be nat'ed to an address on the outbound gateway device, so return traffic will traverse that link.
I know that there are other products that will do this, but don't know of a way in IOS.
Thanks for your help