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NE40E V800R010C10SPC500 Configuration Guide - User Access 01

This is NE40E V800R010C10SPC500 Configuration Guide - User Access
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Configuring an LNS

Configuring an LNS

An L2TP tunnel is established between an LAC and an LNS. You need to enable an L2TP connection and set tunnel parameters and the authentication mode on the LNS.

Usage Scenario

When the NE40E functions as an LNS, you must configure the L2TP group, that is, enable LNS on the NE40E. The LNS responds to the tunnel setup request from the LAC, authenticates users, and then assigns IP addresses to them.

The NE40E provides a tunnel board to process the tunnel service. In this manner, the NE40E can function as multiple LNSs with each LNS being configured with an IP address.

The NE40E manages the LNS service by using LNS groups. An LNS group functions as an LNS. You can configure an IP address for an LNS group and specify the tunnel board for it.

NOTE:
  • When the NE40E functions as an LNS, it is recommended that the IP address of the loopback interface be used as the IP address of the LNS.

  • The LNS cannot use the DHCP server to allocate IP addresses to users because the LNS does not know users' MAC addresses. Therefore, the LNS allocates only IP address in the local address pool to users.

  • When the LNS interconnects with an LAC, the LNS must have a route to the LAC. For example, when the NE40E functions as an LAC, if the LAC is configured with a source interface on the tunnel, the route to the source interface must be configured on the LNS.

Pre-configuration Task

Before configuring the LNS, complete the following tasks:

  • Enabling L2TP

  • Creating a virtual template for L2TP connection setup

  • Configuring the local address pool in which the IP addresses are allocated to L2TP users

  • Configuring the domain of L2TP users and specifying the address pool for the domain

Configuration Procedures

Figure 10-4 Flowchart for configuring the LNS
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Updated: 2019-01-03

Document ID: EDOC1100055031

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