Terminating Stale Pppoa Subscribers And Restarting Lcp Negotiations - Juniper JUNOSE 11.1.X - LINK LAYER CONFIGURATION 4-7-2010 Configuration Manual

services over MPLS with Martini encapsulation to forward the traffic from the selected
circuits. You must create the interface stack for ATM layer 2 statically and define the
configuration parameters individually on a per-interface basis.
The following rules apply when you configure either a static ATM interface within
an existing bulk-configured VC subrange, or a subrange that includes an existing
static ATM interface:
All of the following ATM configurations are supported on the static ATM interface:
ATM layer 2 services over MPLS including local cross-connects, point-to-point
connections, and nonbroadcast multiaccess (NBMA) connections.
Static ATM interfaces and circuits defined within a bulk-configured VC subrange
are stored in NVS and preserved after a reboot.
The base profile associated with the VC subrange does not apply to any statically
defined ATM interfaces that fall within the subrange.
If a VC subrange includes a statically defined ATM interface, overriding profile
assignments configured for the same VPI/VCI address as a statically defined ATM
interface become inactive until the static ATM 1483 subinterface is removed.
The overriding profile becomes active again when you remove the static ATM
1483 subinterface. You can display the current operational status (active or
inactive) of overriding profile assignments by using "show atm bulk-config" on
page 690 .
Operations that add, remove, modify, merge, disable, or enable VC subranges
within a bulk-configured VC range do not affect any static ATM interfaces defined
within the VC subrange.
You cannot create a static ATM circuit if the VPI/VCI address conflicts with an
existing ATM 1483 dynamic subinterface column. Such a configuration would
disrupt subscribers already connected to the router via the dynamic subinterface.
You cannot create a static ATM interface with a VPI/VCI address that falls within
a range of circuits reserved for use by the MPLS downstream-on-demand label
distribution method.
You cannot configure CAC on a static ATM interface within an existing
bulk-configured VC subrange. Conversely, you cannot create a bulk-configured
VC subrange that includes a static ATM interface on which CAC is configured.
(For information about how to use the atm cac command to configure CAC, see
"Setting Optional Parameters" on page 24 in "Configuring ATM" on page 3.)
For configuration information and examples, see "Configuring Static ATM Interfaces
Within VC Subranges" on page 656.

Terminating Stale PPPoA Subscribers and Restarting LCP Negotiations

In configurations of dynamic IP over dynamic PPP over a dynamic (bulk-configured)
ATM 1483 subinterface, the router sends an LCP terminate request packet to a PPPoA
CPE device in response to receipt of an IPv4-over-PPP data packet or an IPv6-over-PPP
data packet when the dynamic ATM 1483 subinterface transitions to a dormant state
due to an ungraceful subscriber logout. This action terminates stale PPPoA subscribers
and causes the CPE to restart LCP negotiations. This behavior is always in effect on
the router and does not require CLI or SNMP configuration.
Chapter 18: Configuring Dynamic Interfaces Using Bulk Configuration
Configuring ATM 1483 Dynamic Subinterfaces
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