Configuration Examples For Atm-To-Ethernet Interworking Functions; Single Dslam Connected To A Pppoe Access Concentrator Example; Table 22: Pppoe Duplicate Protection Scenarios For Iwf And Non-Iwf Pppoe - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - LINK LAYER CONFIGURATION GUIDE 2010-10-13 Configuration Manual

JunosE 11.3.x Link Layer Configuration Guide

Configuration Examples for ATM-to-Ethernet Interworking Functions

Single DSLAM Connected to a PPPoE Access Concentrator Example

392
Table 22: PPPoE Duplicate Protection Scenarios for IWF and non-IWF
PPPoE Sessions
Type of PPPoE Session
IWF PPPoE session
(IWF-Session DSL VSA
contained in the PADR
packet)
Non-IWF PPPoE session
(IWF-Session DSL VSA not
contained in the PADR packet
)
The following sections describe sample configuration cases to illustrate how the
interworking functions are performed when a 1:1 and an N:1 association exists between
DSLAMs and the PPPoE access concentrator (B-RAS application):
Single DSLAM Connected to a PPPoE Access Concentrator Example on page 392
Multiple DSLAMs Connected to a PPPoE Access Concentrator Example on page 393
Consider a topology in which a DSLAM multiplexes multiple PPPoE over ATM sessions
over the Ethernet aggregate network using interworking functionality between PPPoE
over ATM and PPPoE. Figure 39 on page 393 shows a sample configuration scenario in
which one DSLAM is connected to one PPPoE access concentrator. The subscriber access
nodes are connected using ATM links to the DSLAMs. In this circuit, a 1:1 relationship exists
between the DSLAM and the PPPoE access concentrator (PPPoE major interface).
Because of the presence of a 1:1 association between the DSLAM and the access
concentrator, segregation of VLAN IDs is not required. A one-to-one mapping is configured
between the user port and VLAN. The access node is assigned a unique VLAN identification
to a port using either a unique S-VLAN ID or a unique (S-VLAN ID, C-VLAN ID) pair. The
uniqueness of the mapping is maintained in the access node and across the aggregation
network. The B-RAS PPPoE access concentrator demultiplexes the PPPoE sessions.
Duplicate Protection Enabled
Sessions with duplicate MAC
addresses are processed until the
maximum number of PPPoE
sessions configured per major
interface is reached.
Sessions with duplicate MAC
addresses are terminated and
cannot access network resources
Copyright © 2010, Juniper Networks, Inc.
Duplicate Protection
Disabled
Sessions with duplicate
MAC addresses are
processed.
Sessions with duplicate
MAC addresses are
processed.