Lucent Technologies 6000 - Manual (Page 471)

Setting Up Virtual Private Networks
Configuring L2TP tunnels for dial-in clients
MAX 6000/3000 Network Configuration Guide 11-37
Configuring the MAX
To configure the MAX as an L2TP LAC, you must first enable L2TP LAC on the MAX, then
specify how the MAX determines which connections are tunneled.
Configuring systemwide L2TP LAC parameters
To configure systemwide L2TP LAC parameters on the MAX:
1 Open the Ethernet > Mod Config > L2 Tunneling Options menu.
2 Set L2TP Mode to LAC or to Both.
3 If you require tunnel authentication, set L2TP Auth Enabled to Yes.
You must configure both the LAC and LNS identically, to either require or not require
authentication.
4 Set L2TP RX Window to the number of packets that the MAX should receive before it
requests that the sending device stop transmitting packets.
The default is seven. Set the parameter to 0 (zero) to disable flow control in the receiving
direction. The MAX continues to perform flow control for the sending direction regardless
of the value of L2TP RX Window.
Enabling L2TP tunneling for an entire WAN line
If you want the LAC to create L2TP tunnels for every call received on a specific WAN line:
1 Open the Ethernet > Mod Config > L2 Tunneling Options menu.
2 For the line for which you are configuring LAC functionality (Line N), set Line N Tunnel
Type to L2TP. For example, if you want to tunnel all calls received on the first WAN port
(labeled WAN 1 on the MAX back panel), set Line 1 Tunnel Type to L2TP.
3 Set Route Line N to the IP address of the LNS.
Enabling L2TP tunneling on a per-user basis
You can configure RADIUS to direct the MAX to create L2TP tunnels for specific users. To do
so, you use three standard RADIUS attributes: Tunnel-Type, Tunnel-Medium-Type, and
Tunnel-Server-Endpoint. Table 11-3 describes them.
Table 11-3.RADIUS attributes for specifying L2TP tunnels
Attribute Description Possible values
Tunnel-Type (64) Specifies which tunneling protocol
to use for this connection. PPTP or L2TP. You must set
this attribute to L2TP to direct
the MAX to create an L2TP
tunnel.
Tunnel-Medium-Type (65) Specifies the protocol type, or
medium, used for this connection.
Currently, the MAX supports IP
only. Future software releases will
support additional medium types. Currently, the only supported
value is IP. You must set this
attribute to IP.