Network Router User Manual

Configuring L2TP Services
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6.
In the L2TP Tunneling Security window, enable tunnel authentication.
7.
In the L2TP IP Interface window, enter the L2TP IP address.
During the L2TP session, the RADIUS server assigns the following IP
addresses:
[e-mail]: 192.32.40.1
[e-mail]: 192.32.40.2
These addresses are stored in the RADIUS server database.
Data Path Through the Network
After all components of the network are configured, jsmart can place a call to the
local ISP. The LAC that receives this call sends the user name to the TMS, which
verifies the domain name and address and sends this information back to the LAC
so that it can forward the data.
The LAC then negotiates the initiation of the tunnel with the LNS, and the tunnel
is brought up. The LNS then authenticates [e-mail] with the
RADIUS server. After the RADIUS server grants access, it assigns the address
192.32.40.1 to jsmart, to include the remote host (jsmart’s PC) in the virtual
private network.
Data now passes through the tunnel from jsmart’s PC to the LNS for the duration
of the L2TP session. When jsmart disconnects the call, the session is terminated.
If no other active sessions are using the tunnel, the tunnel is brought down.
Parameter Name Value
Enable Tunnel Authentication Enable
Tunnel Authentication Password LAC1
Parameter Name Value
L2TP IP Interface Address 192.32.68.2
Subnet Mask 255.255.255.0