Transparent Bridging And Vpls; Unsupported Features; Platform Considerations; Module Requirements - Juniper JUNOSE 11.1.X - LINK LAYER CONFIGURATION 4-7-2010 Configuration Manual

JUNOSe 11.1.x Link Layer Configuration Guide

Transparent Bridging and VPLS

Except for the bridge crb and bridge route commands, you can use the existing
transparent bridging commands to configure one or more instances of the Virtual
Private LAN Service (VPLS), referred to as VPLS instances, on the router. VPLS employs
a layer 2 virtual private network (VPN) to connect multiple individual LANs across a
service provider's MPLS core network. The geographically dispersed multiple LANs
functions as a single virtual LAN.
A single VPLS instance is analogous to a bridge group, and performs similar functions.
In effect, a VPLS instance is a new or existing bridge group that has additional VPLS
attributes configured.
For details about configuring and using VPLS, see chapter Configuring VPLS in JUNOSe
BGP and MPLS Configuration Guide.

Unsupported Features

The current E Series implementation of transparent bridging does not support the
spanning-tree algorithm as defined in IEEE 802.1D.
NOTE: Because the spanning-tree algorithm is not currently supported, make sure
that your topology avoids the creation of network loops.

Platform Considerations

You can configure transparent bridging on the following E Series Broadband Services
Routers:

Module Requirements

For information about the modules that support transparent bridging on ERX14xx
models, ERX7xx models, and the ERX310 router:
472
Platform Considerations
E120 router
E320 router
ERX1440 router
ERX1410 router
ERX710 router
ERX705 router
ERX310 router
See ERX Module Guide, Table 1, Module Combinations for detailed module
specifications.