Configuring Transparent Bridging; Overview; How Transparent Bridging Works - Juniper JUNOSE 11.1.X - LINK LAYER CONFIGURATION 4-7-2010 Configuration Manual

Chapter 15

Configuring Transparent Bridging

Overview

How Transparent Bridging Works

This chapter provides an introduction to transparent bridging and describes how to
configure transparent bridging on E Series routers.
This chapter contains the following sections:
Overview on page 467
Platform Considerations on page 472
References on page 473
Before You Configure Transparent Bridging on page 473
Configuration Tasks on page 474
Configuration Examples on page 488
Monitoring Transparent Bridging on page 490
This section introduces important concepts that you need to understand before
configuring transparent bridging. These concepts include:
How Transparent Bridging Works on page 467
Bridge Groups and Bridge Group Interfaces on page 468
Bridge Interface Types and Supported Configurations on page 469
Subscriber Policies on page 470
Concurrent Routing and Bridging on page 471
Transparent Bridging and VPLS on page 472
Unsupported Features on page 472
A transparent bridge is a data-link layer (layer 2) relay device that connects two or
more networks or network systems. When a transparent bridge powers up, it
automatically begins learning the network topology by examining the media access
control (MAC) source address of every incoming packet. The bridge then creates an
entry in the forwarding table consisting of the address and associated interface where
the packet was received.
467
Overview