For IOS VPN clients...
your command will only cause me to rekey when i send more traffic... just tried it...
For ASA VPN Clients we have
asa-fw# vpn-sessiondb logoff ?
all All sessions
email-proxy Email-Proxy sessions
index Index specific session
ipaddress IP Address specific sessions
l2l IPsec LAN-to-LAN sessions
name Username specific sessions
protocol Protocol specific sessions
remote IPsec Remote Access sessions
svc SSL VPN Client sessions
tunnel-group Tunnel-group sessions
vpn-lb VPN Load Balancing Mgmt sessions
webvpn WebVPN sessions
