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

LAC Configuration 113
Perform the following configuration in L2TP group view.
By default, the flow control function of Tunnels is disabled.
Setting the L2TP Session
Idle-Timeout Timer
An L2TP session is disconnected automatically if the session is idle or no data is
transmitted or received on it for a specified period of time. You may set a session
idle-timeout timer to specify this idle period. This period can be 0 seconds; that is,
the timer never expires.
Perform the following configuration in L2TP group view.
By default, L2TP session idle-timeout timer never expires.
Configuring the
Tunnel-Hold Function of
L2TP
Normally, the LAC sets up a Tunnel with the LNS only when receiving an L2TP
session request from a PPP user. This Tunnel is automatically torn down after all
PPP sessions are disconnected.
For some applications that require fast connection setup, however, a Tunnel must
be available beforehand so that the system can set up a session immediately after
receiving a PPP session request. To this end, the LAC and the LNS must always
maintain a Tunnel connection even when no session is present on it.
Perform the following configuration in L2TP group view.
By default, the Tunnel-hold function of L2TP is disabled.
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To have the Tunnel-hold function take effect, you must configure it on both LAC
and LNS.
After you configure the Tunnel-Tunnel function of L2TP, you can execute the start
l2tp Tunnel command to start a Tunnel connection.
Perform the following configuration in L2TP group view.
Tab le 95 Set flow control function of a Tunnel
Operation Command
Enable flow control function of a Tunnel tunnel flow-control
Disable flow control function of a Tunnel undo tunnel flow-control
Tab le 96 Set the L2TP session idle-timeout timer
Operation Command
Set the L2TP session idle-timeout timer session idle-time time
Disable the L2TP session idle-timeout timer undo session idle-time
Tab le 97 Configure the Tunnel-hold function of L2TP
Operation Command
Enable the Tunnel-hold function of L2TP tunnel keepstanding
Disable the Tunnel-hold function of L2TP undo tunnel keepstanding