Bridge Interface Types And Supported Configurations; Figure 45: Bridge Group With Fast Ethernet And Gigabit Ethernet Bridge; Table 26: Sample Bridge Group Forwarding Table - Juniper JUNOSE SOFTWARE 11.2.X - LINK LAYER CONFIGURATION GUIDE 7-7-2010 Configuration Manual

Bridge Interface Types and Supported Configurations

Copyright © 2010, Juniper Networks, Inc.

Figure 45: Bridge Group with Fast Ethernet and Gigabit Ethernet Bridge

Interfaces
In Figure 45 on page 467, a bridge group named westford01 is configured on the E Series
router, which allows the router to function as a transparent bridge between a Fast Ethernet
LAN segment and a Gigabit Ethernet LAN segment. The bridge group includes two bridge
interfaces. The bridge interface associated with port 1 is stacked on a VLAN subinterface
over a Fast Ethernet interface. The bridge interface associated with port 2 is stacked on
a VLAN subinterface over a Gigabit Ethernet interface.
Table 26 on page 467 presents a simple representation of the forwarding table for bridge
group westford01.

Table 26: Sample Bridge Group Forwarding Table

Port Source Address
1 Node A
1 Node B
2 Node C
2 Node D
A bridge interface can be configured as one of the following types:
Subscriber (client)—A subscriber (client) bridge interface is downstream from the
traffic flow; that is, the traffic flow direction is from the server (trunk) to the client
(subscriber). This is the default bridge group interface type.
Trunk (server)—A trunk (server) bridge interface is upstream from the traffic flow; that
is, the traffic flow direction is from the client (subscriber) to the server (trunk). To
configure a trunk bridge group interface, you must specify the subscriber-trunk keyword
as part of the bridge-group command.
You can configure bridge interfaces to add transparent bridging capabilities to your
existing network configurations. Currently, bridge interfaces can be stacked on:
Chapter 15: Configuring Transparent Bridging
Interface
Fast Ethernet 2/1.1
Fast Ethernet 2/1.1
Gigabit Ethernet 4/0.1
Gigabit Ethernet 4/0.1
467