A few handy LAN-to-LAN Tunnel VPN commands:
To display all current IKE security associations (SAs) at a peer.
show crypto isakmp sa
To display all current IPsec SA’s.
show crypto ipsec sa
restarting all your ISAKMP VPN Tunnels:
clear crypto isakmp sa
If you need to reset one VPN then you need to reset the IPSEC SA to the peer IP at the other end of your tunnel.
clear ipsec sa peer x.x.x.x
Checking the uptime of a vpn tunnel using the following:
show vpn-sessiondb detail l2l