To Clear VPN Session :
The "no vpnclient connect" and "vpnclient disconnect" commands disconnect current VPN sessions, but do not prevent initiation of new VPN tunnels.
Note: The "no vpnclient enable" command closes all established VPN tunnels and prevents initiation of new VPN tunnels until you enter a vpnclient enable command.
Remove VPN Client commands:
The "clear vpnclient" command clears the Easy VPN Remote configuration and security policy stored in Flash memory