3com MSR 20-20 참조 매뉴얼

L2TP group view

None

Use the mandatory-lcp command to force an LNS to perform LCP negotiation 
with users.

Use the undo mandatory-lcp command to disable the LCP negotiation.

By default, an LNS does not perform LCP negotiation with users.

When starting a PPP session, a client of NAS-initialized VPN will first negotiate with 
the network access server (NAS) for LCP parameters. If the negotiation succeeds, 
the NAS initializes a tunnel and then transfers the negotiated results to the LNS. 
Then the LNS verifies whether the client is valid depending on the proxy 
authentication information. You can use the mandatory-lcp command to force 
the LNS to perform LCP re-negotiation for the client. But the proxy authentication 
information of the NAS may be neglected. Some PPP clients may not support LCP 
re-negotiation. In this case, the LCP re-negotiation will fail.

mandatory-chap.

# Perform LCP negotiation by force.

<Sysname> system-view

[Sysname] l2tp-group 1

[Sysname-l2tp1] mandatory-lcp 

reset l2tp tunnel { remote-name | tunnel-id }

User view

remote-name: Name of the tunnel at the remote end.

tunnel-id: Local ID of the tunnel, in the range of 1 to 8191.

Use the reset l2tp tunnel command to disconnect one or more specified tunnels 
and all sessions of the tunnels.

Note that:

■

A tunnel disconnected by force can be re-established when a client makes a 
call.

■

If you specify a tunnel name, all tunnels with the name, if any, will be 
disconnected. If no tunnel with the name exists, nothing happens.

■

If you specify a tunnel ID, only the tunnel with the ID is disconnected.