Configuring L2Tp Avps For Relay; Configuration Tasks - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - BROADBAND ACCESS CONFIGURATION GUIDE 2010-10-12 Configuration Manual

Configuring L2TP AVPs for Relay

Configuration Tasks

Copyright © 2010, Juniper Networks, Inc.
prevent the router from sending AVP 22 in incoming-call-request (ICRQ) packets. In
this scenario, the router relays the Calling Number AVP.
Previously, the router did not preserve the values of incoming L2TP AVPs across the
LNS/LAC boundary in an L2TP tunnel-switched network. The router regenerated most
incoming AVPs, such as L2TP Calling Number AVP 22, based on the local policy in effect.
However, some AVPs, such as Cisco NAS Port Info AVP 100, were dropped.
In an L2TP tunnel switch profile, you can define the types of AVPs that the router can
relay unchanged across the LNS/LAC boundary. You can specify that the router relay
one or more of the following AVP types:
L2TP Bearer Type AVP 18
L2TP Calling Number AVP 22
Cisco NAS Port Info AVP 100
When you configure any of these AVP types for relay in an L2TP tunnel-switched network,
the router preserves the value of an incoming AVP of this type when packets are switched
between the inbound LNS session and the outbound LAC session.
To configure and use an L2TP tunnel switch profile in an L2TP tunnel-switched network:
Ensure that L2TP tunnel switching is enabled on the router.
1.
Configure the L2TP tunnel switch profile.
2.
Apply the L2TP tunnel switch profile to the tunnel in one of the following ways:
3.
To apply a named tunnel switch profile through an AAA domain map, use the
switch-profile command from Domain Map Tunnel Configuration mode. For details,
see "Applying L2TP Tunnel Switch Profiles by Using AAA Domain Maps" on page 395
.
To apply a named tunnel switch profile through an AAA tunnel group, use the
switch-profile command from Tunnel Group Tunnel Configuration mode. For details,
see "Applying L2TP Tunnel Switch Profiles by Using AAA Tunnel Groups" on page 395
.
To apply a named tunnel switch profile through RADIUS, include the
Tunnel-Switch-Profile RADIUS attribute (VSA 26-91) in RADIUS Access-Accept
messages. For details, see "Applying L2TP Tunnel Switch Profiles by Using RADIUS"
on page 397 .
To apply a default tunnel switch profile to a virtual router, use the aaa tunnel
switch-profile command from Global Configuration mode. For details, see "Applying
Default L2TP Tunnel Switch Profiles" on page 396 .
The following sections describe how to perform each of these tasks.
Chapter 13: Configuring an L2TP LNS
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