3Com Switch 8800 Family IPsec Module Configuration and Command reference Guide

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Use the undo mandatory-lcp command to disable LCP renegotiation.
By default, LCP is not renegotiated.
Concerning NAS-Initialized VPN client, PPP negotiation will be first performed with
Network Access Server (NAS) at the beginning of a PPP session. If the negotiation
is successful, the access server will initiate the tunnel connection and transmit the
information collected during the negotiation to LNS. LNS will judge whether the
user is legal based on the information. The mandatory-lcp command can be used
to force LNS and client to renegotiate LCP. In this case, NAS agent authentication
information is ignored. If PPP clients do not support LCP renegotiation, LCP
renegotiation will fail.
Related command: mandatory-chap.
Example
# Enable LCP renegotiation.
[SecBlade VPN-l2tp1] mandatory-lcp
reset l2tp session Syntax
reset l2tp session session-id
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Parameter
session-id: Local identifier of a session.
Description
Use the reset l2tp session command to force down a session, which can be reset
up when the user calls in again.
Related command: reset l2tp tunnel.
Example
# Force down an L2TP session.
<SecBlade VPN> reset l2tp session 1
reset l2tp tunnel Syntax
reset l2tp tunnel { name remote-name | id tunnel-id }
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Parameter
remote-name: Name of the peer end of the tunnel.
tunnel-id: ID of the local end of the tunnel.