Specifications

Chapter 5. Configuring Software Options 125
2. Decide if one side or both sides of the connection should be allowed to initiate a tunnel.
3. Create the L2TP Tunnel Entry with these characteristics:
¥ The host name of the L2TP client
¥ The host name of the L2TP network server
¥ A Tunnel CHAP secret (both sides of the connection must use the same secret)
¥ The IP address of the other party must be provided to the initiating side of the tunnel
¥ Type of flow control (pacing, sequence numbers, or none)
4. Create a remote entry for the PPP session. Associate the remote entry with the Tunnel.
Verification Steps
1. Verify that the IP address of the other end of the tunnel is correctly routed through the right, local
interface/remote and will not appear to be routed through the tunnel. An attempt to route the tunnel
endpoint within itself will fail.
2. Try to establish IP connectivity (using the ping or tracert commands).
a.ÒPingingÓ from the L2TP client or LNS to the opposite tunnel endpoint should 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
L2TP configuration commands are used to configure:
¥ Tunnels
¥ The PPP session
¥ Commands to configure tunnels
For additional information, see L2TP Ñ Virtual Dial-Up Configuration Commands, page 322.
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: