Binds an object tracker to a remote VPN peer or to an interface, to check whether the remote peer or the interface is up. Use no keepalive-track to disable this mechanism (default setting).
Note:
When configuring VPN, use the keepalive-track command instead of the keepalive command when the remote peer does not support DPD, or when you want to monitor servers behind the VPN remote peer.
You cannot configure both keepalive-track and ip address dhcp (DHCP Client) on the WAN FastEthernet interface.