Junos® OS Ethernet Interfaces Configuration ... - Juniper Networks

You can also associate a PPPoE dynamic profile, routing instance, and static PPPoE
interface with an ACI/ARI pair.
Dynamic Profiles and Routing Instances in PPPoE Service Name Tables
You can associate a previously configured PPPoE dynamic profile with a named service,
empty service, or any service in the PPPoE service name table, or with an ACI/ARI pair
defined for these services. The router uses the attributes defined in the profile to
instantiate a dynamic PPPoE subscriber interface based on the service name, ACI, and
ARI information provided by the PPPoE client during PPPoE negotiation. The dynamic
profile configured for a service entry or ACI/ARI pair in a PPPoE service name table
overrides the dynamic profile assigned to the PPPoE underlying interface on which the
dynamic PPPoE interface is created.
To specify the routing instance in which to instantiate the dynamic PPPoE interface, you
can associate a previously configured routing instance with a named service, empty
service, or any service in the PPPoE service name table, or with an ACI/ARI pair defined
for these services. Like dynamic profiles configured for service entries or ACI/ARI pairs,
the routing instance configured for the PPPoE service name table overrides the routing
instance assigned to the PPPoE underlying interface.
For information about configuring the PPPoE service name table to create a dynamic
PPPoE subscriber interface, see Assigning a Dynamic Profile and Routing Instance to a
Service Name or ACI/ARI Pair for Dynamic PPPoE Interface Creation in the Junos OS
Subscriber Management, Release 12.3.
Maximum Sessions Limit in PPPoE Service Name Tables
Copyright © 2012, Juniper Networks, Inc.
To limit the number of PPPoE client sessions that can use a particular service entry in
the PPPoE service name table, you can configure the maximum number of active PPPoE
sessions using either dynamically-created or statically-created PPPoE interfaces that
the router can establish with a particular named service, empty service, or any service.
(You cannot configure the maximum sessions limit for an ACI/ARI pair.) The maximum
sessions limit must be in the range 1 through the platform-specific maximum PPPoE
sessions supported for your routing platform. The router maintains a count of active
PPPoE sessions for each service entry to determine when the maximum sessions limit
has been reached.
The router uses the maximum sessions value for a service entry in the PPPoE service
name table in conjunction with both of the following:
• The maximum sessions (max-sessions) value configured for the PPPoE underlying
interface
• The maximum number of PPPoE sessions supported on your routing platform
If your configuration exceeds either of these maximum session limits, the router cannot
establish the PPPoE session.
Chapter 30: Configuring Point-to-Point Protocol over Ethernet
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