Configuring An Lns - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - BROADBAND ACCESS CONFIGURATION GUIDE 2010-10-12 Configuration Manual

JunosE 11.3.x Broadband Access Configuration Guide
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Configuring an LNS

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Create a virtual router.
1.
host1(config)#virtual-router west
Assign a router ID IP address, such as that for a loopback interface, to the virtual router.
2.
This address must be reachable by the L2TP peer.
host1:west(config)#ip router-id 10.10.45.3
CAUTION: You must explicitly assign a router ID to a virtual router rather
than using a dynamically assigned router ID. A fixed ID is required because
every time the ID changes, L2TP must disconnect all existing tunnels and
sessions that use the old ID. If you use a dynamically assigned router ID,
the value can change without warning, leading to failure of all L2TP tunnels
and sessions. Also, the router could dynamically assign a router ID that is
not reachable by the L2TP peer, causing a complete failure of L2TP. You
must set the router ID even if you specified a source address in the domain
map or a local address in the host profile.
virtual-router
ip router-id command
When you configure an LNS, you can configure it to accept calls from any LAC.
NOTE: If there is no explicit LNS configuration on the router, the UDP port
used for L2TP traffic is closed, and no tunnels or sessions can be established.
To enable an LAC to connect to the LNS, you must create the following profiles:
An L2TP destination profile—Defines the location of each LAC
An L2TP host profile—Defines the attributes used when communicating with an LAC
NOTE: If you remove a destination profile or modify attributes of a host
profile, all tunnels and sessions using the profile will be dropped.
Copyright © 2010, Juniper Networks, Inc.