Authenticating Subscribers On Dynamic Bridged Ethernet Over Dynamic Atm Interfaces - Juniper JUNOSE SOFTWARE 11.0.X - LINK LAYER CONFIGURATION GUIDE 4-1-2010 Configuration Manual

JUNOSe 11.0.x Link Layer Configuration Guide
The implementation of this feature for dynamic ATM 1483 subinterfaces is almost
identical to the implementation for static ATM 1483 subinterfaces, with the following
difference:
For details about the operation and benefits of this feature, see "Terminating Stale
PPPoA Subscribers and Restarting LCP Negotiations" on page 483 in "Configuring
Dynamic Interfaces" on page 465, which describes the router behavior for static
ATM 1483 subinterfaces.
Authenticating Subscribers on Dynamic Bridged Ethernet over Dynamic
ATM Interfaces
You can use either of the following methods to configure and manage RADIUS
authentication for IP subscribers on dynamic bridged Ethernet over dynamic
ATM 1483 subinterfaces:
The atm atm1483 subscriber command does not support running stateful SRP
switchover (high availability) on the router. Therefore, the configuration method you
choose depends on whether stateful SRP switchover is or is not running on your
router.
Configuration Method Using atm atm1483 subscriber Command
When you use the atm atm1483 subscriber command, as described in "atm atm1483
subscriber" on page 591, to configure IP subscribers on dynamic bridged Ethernet
over dynamic ATM 1483 subinterface columns to support RADIUS authentication,
the atm atm1483 subscriber command provides the subscriber's authentication
parameters. The dynamic ATM 1483 subinterface acts as the authenticating layer
that establishes a session with RADIUS and passes the subscriber's locally configured
username and password information to the RADIUS server.
However, if your router is running stateful SRP switchover (high availability), the use
of the atm atm1483 subscriber command in this configuration might suspend stateful
SRP switchover on the router or prevent stateful SRP switchover from becoming
active. To bypass this limitation, you can use the subscriber management application
to configure IP subscribers on dynamic bridged Ethernet interfaces.
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Configuring ATM 1483 Dynamic Subinterfaces
For static ATM 1483 subinterfaces, the restart of LCP negotiations by the CPE
causes the router to re-create the dynamic PPP and IP upper-layer interfaces
above the static ATM 1483 subinterface.
For dynamic ATM 1483 subinterfaces, the receipt of a PPP data packet from the
CPE causes the router to re-create only the dynamic ATM 1483 subinterface to
send the LCP terminate request packet, but not the dynamic PPP and IP
upper-layer interfaces above the dynamic ATM 1483 subinterface. The router
re-creates the dynamic PPP and IP upper-layer interfaces when the CPE restarts
LCP negotiations.
The atm atm1483 subscriber command
The subscriber management application