Table of Contents

About the Documentation
E Series and JunosE Documentation and Release Notes
Audience
E Series and JunosE Text and Syntax Conventions
Obtaining Documentation
Documentation Feedback
Requesting Technical Support
Overview
L2TP Functionalities
L2TP Overview
L2TP Terminology
Packet Fragmentation
L2TP Deployment
Implementing L2TP
Sequence of Events on the LAC
Sequence of Events on the LNS
Overriding LNS Out-of-Resource Result Codes 4 and 5
Overriding the Result Codes
Displaying the Current Override Setting
L2TP Platform and Module Requirements
L2TP Module Requirements
ERX7xx Models, ERX14xx Models, and the ERX310 Router
E120 Router and E320 Router
L2TP Platform Considerations
L2TP References
L2TP Sessions and Tunnels
Sessions and Tunnels Supported
Stateful Line Module Switchover Platform Considerations
Managing L2TP Destinations, Tunnels, and Sessions
Application Support for Stateful Line Module Switchover
Policy Management
QoS
Connection Manager and Queue Manager
PPP
L2TP
Forwarding Controller
Mirroring Subsystem
Unified ISSU
ICCP
Termination of PPP and L2TP Subscriber Sessions
VSAs for Dynamic IP Interfaces Overview
Traffic Shaping for PPP over ATM Interfaces
Mapping Application Terminate Reasons and RADIUS Terminate Codes Overview
PPP Accounting Statistics
PPP Accounting Statistics
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
Chassis
Virtual Router
Targets
Sessions
L2TP Dial-Out Outgoing Call Setup Details
Access-Request Message
Access-Accept Message
Outgoing Call
Mutual Authentication
Route Installation
Configuration
Configuration Tasks for LNS
LNS Configuration Prerequisites
Configuring an LNS
Creating an L2TP Destination Profile
Creating an L2TP Host Profile
Configuring the Maximum Number of LNS Sessions
Configuring Groups for LNS Sessions
Controlling the Handling of L2TP Hello Packets in Fast Path
Configuration Tasks for TX Speed and RX Window Sizes
Configuring the RADIUS Connect-Info Attribute on the LNS
Configuring the Receive Window Size
Configuring the Default Receive Window Size
Configuring the Receive Window Size on the LAC
Configuring the Receive Window Size on the LNS
Bundled LNS Sessions
Selecting Service Modules for LNS Sessions Using MLPPP
Assigning Bundled Group Identifiers
Overriding All Endpoint Discriminators
Configuring L2TP Tunnels on LNS
Enabling Tunnel Switching
Creating Persistent Tunnels
Testing Tunnel Configuration
Configuring L2TP Tunnel Switch Profiles
Applying the L2TP Tunnel Switch Profile
Configuration Guidelines
Configuring L2TP AVPs for Relay
Configuration Tasks
Enabling Tunnel Switching on the Router
Configuring L2TP Tunnel Switch Profiles
Applying L2TP Tunnel Switch Profiles by Using AAA Domain Maps
Applying L2TP Tunnel Switch Profiles by Using AAA Tunnel Groups
Applying Default L2TP Tunnel Switch Profiles
Applying L2TP Tunnel Switch Profiles by Using RADIUS
Configuration Task for L2TP Disconnect-Cause Code
Configuring Disconnect Cause Information
Generating the Disconnect Cause AVP Globally
Generating the Disconnect Cause AVP with a Host Profile
Enabling RADIUS Accounting for Disconnect Cause
Displaying Disconnect Cause Statistics
Peer Resynchronization Methods for Failover
Configuring Peer Resynchronization
Configuring Peer Resynchronization for L2TP Host Profiles and AAA Domain Map Tunnels
Configuring the Global L2TP Peer Resynchronization Method
Using RADIUS to Configure Peer Resynchronization
Transmit Connect Speed Method for L2TP Sessions
Configuring the Transmit Connect Speed Calculation Method
Transmit Connect Speed Calculation Methods
Static Layer 2
Dynamic Layer 2
QoS
Actual
Transmit Connect Speed Calculation Examples
Example 1: L2TP Session over ATM 1483 Interface
Example 2: L2TP Session over Ethernet VLAN Interface
Transmit Connect Speed Reporting Considerations
Session Termination for Dynamic Speed Timeout
Advisory Speed Precedence for VLANs over Bridged Ethernet
Using AAA Domain Maps to Configure the Transmit Connect Speed Calculation Method
Using AAA Tunnel Groups to Configure the Transmit Connect Speed Calculation Method
Using AAA Default Tunnel Parameters to Configure the Transmit Connect Speed Calculation Method
Using RADIUS to Configure the Transmit Connect Speed Calculation Method
Configuration Commands
aaa tunnel switch-profile
aaa tunnel tx-connect-speed-method
avp
bundled-group-id
bundled-group-id-overrides-mlppp-ed
default-upper-type mlppp
disable proxy lcp
disconnect-cause
enable proxy authenticate
failover-resync
ip router-id
l2tp destination profile
l2tp disconnect-cause
l2tp failover-resync
l2tp fastpath-hello-processing
l2tp switch-profile
l2tp tunnel-switching
l2tp tunnel default-receive-window
l2tp tunnel idle-timeout
l2tp tunnel test
local host
local ip address
max-sessions
radius connect-info-format
radius include
receive-window
remote host
sessions-limit-group
session-out-of-resource-result-code-override
tunnel password
tx-connect-speed-method
virtual-router
Administration
Verifying Domain Maps and L2TP Tunnels with AAA
Monitoring the Mapping for User Domains and Virtual Routers with AAA
Monitoring Configuration of Tunnel Parameters with AAA
Monitoring Configured Tunnel Groups with AAA
Verifying the L2TP Tunnel Aggregated Settings
Monitoring Global Configuration Status on E Series Routers
Monitoring L2TP Destination Settings
Monitoring Detailed Configuration Information for Specified Destinations
Monitoring Configured and Operational Status of all Destinations
Monitoring Locked Out Destinations
Monitoring Configured L2TP Destination Profiles or Host Profiles
Viewing the Disconnect Cause-Codes for PPP Sessions
Monitoring Statistics on the Cause of a Session Disconnection
Viewing the Configured L2TP Session Details
Monitoring Detailed Configuration Information about Specified Sessions
Monitoring Configured and Operational Summary Status
Viewing L2TP Switch-Profiles
Monitoring Configured Switch Profiles on Router
Monitoring L2TP Tunnel Settings
Monitoring Detailed Configuration Information about Specified Tunnels
Monitoring Configured and Operational Status of All Tunnels
Monitoring L2TP Dial-Out Settings
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
Monitoring Commands
show aaa domain-map
show aaa tunnel-group
show aaa tunnel-parameters
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
show l2tp switch-profile
show l2tp tunnel
Index
Index