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Home > Support > Technical Documentation > JunosE Software > L2TP Operations on E Series Broadband Services Routers, Release 13.2
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L2TP Operations on E Series Broadband Services Routers, Release 13.2

Layer 2 Tunneling Protocol (L2TP) is a client-server protocol that allows Point-to-Point Protocol (PPP) to be encapsulated and tunneled across a network. An L2TP access concentrator (LAC), configured on an E Series router, receives packets from a remote client and forwards them to an L2TP network server (LNS), which can be another E Series router or another device at the remote edge.


This page provides information that describes the processing of L2TP traffic on E Series routers.


JunosE Software Documentation for E Series Broadband Services Routers, Release 13.2

  • Overview
  • Configuration
  • Administration
  • Troubleshooting
L2TP Functionalities

L2TP Overview

L2TP Terminology

Packet Fragmentation

L2TP Deployment

Implementing L2TP

L2TP Platform and Module Requirements

L2TP Module Requirements

L2TP Platform Considerations

L2TP References

L2TP Sessions and Tunnels

Sessions and Tunnels Supported

Termination of PPP and L2TP Subscriber Sessions

VSAs for Dynamic IP Interfaces Overview

Overview of Mapping Application Terminate Reasons and RADIUS Terminate Codes

How L2TP Dial-Out Works

L2TP Dial-Out Overview

L2TP Dial-Out Platform Considerations

L2TP Dial-Out References

L2TP Dial-Out Network Model

L2TP Dial-Out Process

L2TP Dial-Out Operational States

L2TP Dial-Out Outgoing Call Setup Details

Configuring L2TP Dial-Out

Configuring L2TP Dial-Out

Configuring a LAC Device in an L2TP Tunnel

Mapping User Domain Names to L2TP Tunnels from Domain Map Tunnel Mode

Mapping User Domain Names to L2TP Tunnels from Tunnel Group Tunnel Mode

Configuring an LNS Device in an L2TP Tunnel

Configuring an LNS

Configuration Commands

aaa domain-map

aaa tunnel assignment-id-format

aaa tunnel client-name

aaa tunnel ignore

aaa tunnel password

address

bundled-group-id

bundled-group-id-overrides-mlppp-ed

client-name

identification

default-upper-type mlppp

disable proxy lcp

enable proxy authenticate

l2tp destination profile

l2tp disable challenge

l2tp ignore-receive-data-sequencing

local host

local ip address

max-sessions

medium ipv4

password

preference

radius connect-info-format

remote host

router-name

server-name

session-out-of-resource-result-code-override

source-address

tunnel

tunnel group

type

tunnel password

Monitoring L2TP Dial-Out

Monitoring Chassis-wide Configuration for L2TP Dial-out

Monitoring Dial-out Targets within the Current VR Context

Monitoring Operational Status within the Current VR Context

Monitoring Status of Dial-out Sessions

Verifying the Cause Codes for Termination of L2TP Sessions

L2TP Disconnect Cause Codes

L2TP Terminate Reasons

PPP Terminate Reasons

Configuring Custom Mappings for PPP Terminate Reasons

Monitoring Consolidated L2TP Details

Monitoring Detailed Configuration Information for Specified Destinations

Monitoring Global Configuration Status on E Series Routers

Monitoring Locked Out Destinations

Monitoring L2TP Disconnect Cause-Codes

Monitoring Statistics on the Cause of a Session Disconnection

Monitoring L2TP Sessions

Monitoring Detailed Configuration Information about Specified Sessions

Monitoring Configured and Operational Summary Status

Monitoring Commands

show l2tp

show l2tp destination

show l2tp destination lockout

show l2tp destination profile

show l2tp received-disconnect-cause-summary

show l2tp dial-out

show l2tp dial-out session

show l2tp dial-out target

show l2tp dial-out virtual-router

show l2tp session

Knowledge Base

Sample QoS config for L2TP

L2TP fabric bus selection algorithms

L2TP retransmission algorithm.

Fragmentation and L2TP

L2TP Local Address is incorrect in the 'show l2tp destination detail' output on an LNS

Under certain conditions a GE2 configured as a Service Module will have adverse affects on forwarding when it is the only card providing L2TP peer services

ERX operating as an L2TP LNS will not negotiate multilink PPP with tunneled clients unless the LAC supplies proxy LCP information when establishing the tunnel.

erx1440 LAC unable to process more than 16K L2TP sessions when configured for larger B-RAS license

Configuring ERX and Windows XP for L2TP over IPSec

SNMP Trap support for L2TP Tunnels and Sessions

Reason for L2TP Data rx discard packets.

Sample configuration for L2TP tunnel switching

L2TP Dial-Out Functionality

L2TP destruct timeout and tunnel termination

Sample L2TP configuration and logs for troubleshooting

ERX accounting behavior for PPP and L2TP

Show L2TP session CLI output is inconsistent

L2TP tunnel switch fragmentation corrupting egress packets

GRE tunnel over L2TP stops receiving data

L2TP sessions remain in a down state.

Fabric double counts packets for L2TP subscriber.

ERX LAC L2TP Tunnel To Lucent LNS Fails

Incorrect L2TP result codes when override is enabled

L2TP Tunnel Sessions No Longer Establish After Slot Reload

Number of supported L2TP tunnels and sessions per release

Null Accounting Statistics when a L2TP subscriber ungracefully terminates

 

Downloads

  • Download this page: L2TP Operations on E Series Broadband Services Routers, Release 13.2 PDF Document
  • Broadband Access Configuration Guide, Release 13.2.0 PDF Document
  • L2TP Operations on E Series Broadband Services Routers PDF Document
 
 
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