User guide

110 Chapter 4. Configuring Special Features
a.ÒPingingÓ from the L2TP client or LNS to the opposite tunnel endpoint will succeed (this tests the
tunnel path).
b.ÒPingingÓ from a tunnel endpoint IP address to an IP address within the tunnel will probably fail due to
the existence of the IP firewall.
Configuration Commands
There are two categories of L2TP commands which are respectively associated with:
¥ Tunnels and the L2TP protocol
¥ The PPP session
¥ Commands associated with tunnels and the L2TP Protocol
These commands are used to configure L2TP tunnels. For additional information on the syntax of the
commands listed below, please refer to the L2TP commands section in the Command Line Interface
Reference chapter.
L2TP tunnel entry:
l2tp add <TunnelName>
The remote tunnel host name:
l2tp set remoteName <name> <TunnelName>
The local tunnel host name:
l2tp set ourTunnelName <name> <TunnelName>
CHAP Secret:
l2tp set CHAPSecret <secret> <TunnelName>
Tunnel Authentication:
l2tp set authen on|off <TunnelName>
Type of L2TP support for tunnel:
A tunnel entry can be configured to act as a LAC, an LNS, both a LAC and LNS, or disabled.
l2tp set type all|lns|l2tpclient|disabled <TunnelName>
Remote tunnel IP address:
l2tp set address <ipaddr> <TunnelName>
Note: Verify that the IP address of the other end of the tunnel is correctly routed. It should not be routed
through the tunnel itself, but over a physical link.
Our PPP system name and secret/password:
The following commands specify the routerÕs name and password/secret for authentication purposes on a
per-tunnel basis.
l2tp set ourSysName <name> <TunnelName>
l2tp set ourPassword <password> <TunnelName>