Example: Configuring Fragmentation and Reassembly for Dynamic MLPPP Over L2TP

This example shows you how to configure fragmentation and reassembly for dynamic MLPPP over L2TP.

• Requirements
• Overview
• Configuring Fragmentation and Reassembly for Dynamic MLPPP over L2TP

Requirements

Before you begin configuring static MLPPP, you must configure the individual interfaces on which you want to enable MLPPP. See the following:

• Configuring Channelized T3 Interfaces in JunosE Physical Layer Configuration Guide
• Configuring T3 and E3 Interfaces in JunosE Physical Layer Configuration Guide
• Configuring Channelized OCx/STMx Interfaces in JunosE Physical Layer Configuration Guide

Overview

To configure fragmentation and reassembly for dynamic MLPPP over L2TP, create an L2TP profile using the profile l2tp-profile command. You can then define the router address as the destination LAC address using the l2tp destination profile command.

Configuring Fragmentation and Reassembly for Dynamic MLPPP over L2TP

Step-by-Step Procedure

1. Configure the IP address of the router and define a loopback interface.
   host1(config)#ip router-id 193.1.1.1 host1(config)#interface loopback 0
2. Configure the Gigabit Ethernet interface.
   host1(config-if)#ip address 193.1.1.1 255.255.255.0 host1(config-if)#interface gigabitEthernet 1/1 host1(config-if)#ip unnumbered loopback 0 host1(config-if)#exit host1(config)#ip route 193.1.1.2 255.255.255.255 gigabitEthernet 1/1
3. Configure the L2TP profile.
   host1(config)#profile l2tp-profile host1(config-profile)#ip virtual-router default host1(config-profile)#ip unnumbered loopback 0 host1(config-profile)#ip access-routes host1(config-profile)#ppp authentication pap host1(config-profile)#ppp keepalive host1(config-profile)#ppp multilink enable host1(config-profile)#ppp mru 1590 host1(config-profile)#ppp reassembly 1590 host1(config-profile)#ppp fragmentation 128 host1(config-profile)#pppoe session 8000 host1(config-profile)#exit
4. Configure the L2TP destination profile that defines the router IP address as the LAC address.
   host1(config)#l2tp destination profile lac ip address 193.1.1.2 host1(config-l2tp-dest-profile)#remote host xxx.com host1(config-l2tp-dest-profile-host)#enable proxy authenticate host1(config-l2tp-dest-profile-host)#tunnel password welcome host1(config-l2tp-dest-profile-host)#profile l2tp-profile

Related Documentation

• Configuring Dynamic MLPPP
• Configuring Fragmentation and Reassembly for Dynamic MLPPP