<Huawei> display l2tp tunnel
Total tunnel = 1
LocalTID RemoteTID RemoteAddress Port Sessions RemoteName
1 1 202.38.160.1 57344 1 LAC
Run the display l2tp session command, and you can view that the L2TP session is established.
For example:
<Huawei> display l2tp session
Total session = 1
LocalSID RemoteSID LocalTID
2036 1469 1
Run the display l2tp-group [ group-number ] command, and you can check the configuration
about one special L2TP group. For example:
<Huawei> display l2tp-group 1
-----------------------------------------------
L2tp-index : 1
GroupType : REQUEST_DIALIN_L2TP
TunnelAuth : Use tunnel authentication
LocalName : lac1
Encrypt : 0
Hello : 60
Retransmit : 5
Timeout : 2
IfIndex : 4294967295
SrcIp : 255.255.255.255
VtNum : 0
RemoteName :
ForceChap : 0
LcpReg : 0
LcpMismatch : 0
tunnel each user : 0
-----------------------------------------------
4.4 Configuring LNS
After receiving a tunnel setup request from an LAC, an LNS checks the authentication method
and determines whether to allow the LAC to set up an L2TP tunnel.
4.4.1 Establishing the Configuration Task
Before configuring an LNS, familiarize yourself with the applicable environment, complete the
pre-configuration tasks, and obtain the required data. This can help you complete the
configuration task quickly and accurately.
Applicable Environment
An LNS offers different virtual templates to receive the tunnel-establishing requests from
different LACs. After receiving one of these requests, the LNS needs to check whether the name
of the LAC (remote end) are valid, and then decide whether to permit the remote end to establish
a tunnel.
After an LAC performs the user authentication, an LNS can re-authenticates the user. That is,
the user is authenticated twice. One is on the LAC, and the other is on the LNS.
After a user passes the authentication on the LNS, the user can communicate with the LNS. If
the user authentication on the LNS fails, L2TP is notified to remove the L2TP connection. In
Huawei AR1200 Series Enterprise Routers
Configuration Guide - VPN 4 L2TP Configuration
Issue 01 (2012-04-20) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
258
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