Command Reference Guide

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3Com Router 3000 Ethernet Family

Chapter 1 L2TP Configuration Commands

3Com Corporation

1-13

Parameter

ip ip-addr: IP address of the peer end of the tunnel (LNS). Five IP addresses can be set

at most to provide LNS backup for each other.

domain-name: Domain name triggering connection requests, a case sensitive

character string with the length ranging from 1 to 30.

user-name: Full username triggering connection requests, a case sensitive character

string with the length ranging from 1 to 32.

Description

Use the start l2tp command to specify conditions triggering the local end to place calls

when it works as L2TP LAC.

Use the undo start l2tp command to delete the specified triggering conditions.

This command is used on LAC side to specify IP address of LNS; it can support several

connection request triggering conditions, specifically,

z Initiating tunnel connection request according to the user’s domain name. For

example, if domain name of user’s company is huawei.com, the user with this

domain name can be specified as a VPN user.

z Deciding whether a user is a VPN user according to its dialed number. For

example, if the number 8810188 is specified to be the special service number, the

access user who dials this number is a VPN user.

z Specifying a user to be a VPN user by directly specifying full username.

For a VPN user, the local end (LAC) will send L2TP tunnel connection request to a

certain LNS according to the configured LNS priority or order. If receiving response

from the LNS within the specified period, LAC will take it as the peer end of the tunnel.

If not, LAC will send tunnel connection request to the next LNS.

Conflicts may exist between these VPN user judgment ways. For example, LNS

address specified according to full username is 1.1.1.1, while that according to domain

name is 1.1.1.2. To avoid situations like this, a user searching order is necessary to be

specified. The system always starts a search by looking for the specified L2TP group by

full username; if finding no match, it continues the search by domain name.

Example

# Specify the users using the domain name of “huawei.com” to be VPN users, with IP

address of the L2TP access server of the headquarters being 202.38.168.1.

[Quidway-l2tp1] start l2tp ip 202.38.168.1 domain huawei.com

1.1.18 start l2tp tunnel

Syntax

start l2tp tunnel