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NE40E V800R010C10SPC500 Configuration Guide - User Access 01

This is NE40E V800R010C10SPC500 Configuration Guide - User Access
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Configuring L2TP Tunnel Switching

Configuring L2TP Tunnel Switching

Currently, the networking modes are diversified. If a user accesses the LNS across several tunnels, configure L2TP tunnel switching on the intermediate devices.

Context

For details about the implementation principle of L2TP tunnel switching, see Configuring the L2TP Tunnel Switching. When the NE40E functions as an LTS, you must configure L2TP groups to function as the LAC and LNS, respectively. That is, enable the LTS feature on the NE40E. On one hand, the LTS functions as an LNS to respond to tunnel connection requests initiated by the LAC on the user side. On the other hand, the LTS functions as an LAC to initiate tunnel connection requests to the LNS (or another LTS node) on the server side.

Therefore, you must create two L2TP groups when configuring the LTS. One functions as the LNS to receive tunnel connection requests from the LAC, and the other functions as the LAC to send tunnel connection requests to the LNS. When the LTS functions as the LNS, the L2TP group responds to the LAC as the peer end of the tunnel. When the LTS functions as the LAC, the L2TP group must be bound to the LTS domain to trigger tunnel establishment. In a common L2TP scenario, if an address pool instead of an L2TP group is bound to the LTS domain, the LTS terminates the tunnel and assigns IP addresses to users. However, tunnel establishment is triggered to implement tunnel switching only when an L2TP group that functions as the LAC is bound to the LTS domain.

The configuration of the LTS functioning as the LNS is the same as that of the LNS. For details, see Configuring an LNS.

The configuration of the LTS functioning as the LAC is the same as that of the LAC. For details, see Configuring an LAC.

NOTE:

You must specify the LAC-side L2TP group for the LTS domain. The address pool, however, does not need to be specified.

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Updated: 2019-01-03

Document ID: EDOC1100055031

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