Configuring Pppoe For Ethernet Modules; Figure 40: Multiple Dslams Connected To A Pppoe Access Concentrator - 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
ATM
DSLAM
ATM
DSLAM

Configuring PPPoE for Ethernet Modules

394

Figure 40: Multiple DSLAMs Connected to a PPPoE Access Concentrator

VLAN ID = 1
Fast Ethernet or
Gigabit Ethernet
Layer 2 switch
VLAN ID = 2
VLAN ID = 3
ATM
DSLAM
Although in such a scenario, in which a N:1 DSLAM and PPPoE access concentrator
relationship is exhibited, normally a VLAN grouping is performed to segregate the traffic
from each DSLAM. Such a grouping of VLAN IDs is a regular network administration
practice. If such a grouping of VLAN IDs is made, a 1:1 relationship between DSLAM and
the PPPoE access concentrator is created that enables each access concentrator to
serve a VLAN group.
You can configure PPPoE on Fast Ethernet (FE), Gigabit Ethernet (GE), and 10-Gigabit
Ethernet (10GE) modules. You can configure Ethernet interfaces with IP only, with PPPoE
only, with both IP and PPPoE, and with or without VLANs.
This section provides information about configuring PPPoE without VLANs. If you want
to configure PPPoE with VLANs, see "Configuring VLAN and S-VLAN Subinterfaces" on
page 167, which shows common VLAN configurations such as:
PPPoE over VLAN
IP over VLAN and PPPoE over VLAN
NOTE: "Configuring VLAN and S-VLAN Subinterfaces" on page 167 provides
other non-VLAN configuration examples, such as configurations using
MPLS.
For more information about specific Ethernet modules and the protocols and applications
they support, see:
ERX Module Guide, Appendix A, Module Protocol Support (for ERX7xx models, ERX14xx
models, and ERX310 router)
Layer 2 switch
VLAN ID = 1, 2, 3
Gigabit Ethernet
Layer 3 switch
Layer 2 switch
Copyright © 2010, Juniper Networks, Inc.
B-RAS