Configuring an L2TP LAC

An L2TP access concentrator (LAC) receives packets from a remote client and forwards them to an L2TP network server (LNS) on a remote network. You can configure your E Series router to function as an LAC.

This chapter includes the following topics that provide information for configuring an L2TP LAC on the E Series router:

• LAC Configuration Prerequisites
• Modifying L2TP LAC Default Settings for Managing Destinations, Tunnels, and Sessions
• Generating UDP Checksums in Packets to L2TP Peers
• Specifying a Destruct Timeout for L2TP Tunnels and Sessions
• Preventing Creation of New Destinations, Tunnels, and Sessions
• Shutting Down Destinations, Tunnels, and Sessions
• Specifying the Number of Retransmission Attempts
• Controlling the Transmission of L2TP Hello Messages to L2TP Peers in Control Channels
• Configuring Calling Number AVP Formats
• Mapping a User Domain Name to an L2TP Tunnel Overview
• Mapping User Domain Names to L2TP Tunnels from Domain Map Tunnel Mode
• Mapping User Domain Names to L2TP Tunnels from Tunnel Group Tunnel Mode
• Transmission of the Subscriber Access Interface Speed to LNS Using the RX Connect-Speed AVP
• Configuring the RX Speed on the LAC
• Managing the L2TP Destination Lockout Process
• Managing Address Changes Received from Remote Endpoints
• Configuring LAC Tunnel Selection Parameters