Juniper JUNOSE 11.1.X - LINK LAYER CONFIGURATION 4-7-2010, Руководство по настройке

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Figure 43: Bridge Group with Fast Ethernet and Gigabit Ethernet Bridge Interfaces
In Figure 43 on page 469, 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 25 on page 469 presents a simple representation of the forwarding table for
bridge group westford01.
Table 25: Sample Bridge Group Forwarding Table
Interface Source Address Port
Fast Ethernet 2/1.1 Node A 1
Fast Ethernet 2/1.1 Node B 1
Gigabit Ethernet 4/0.1 Node C 2
Gigabit Ethernet 4/0.1 Node D 2
Bridge Interface Types and Supported Configurations
A bridge interface can be configured as one of the following types:
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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.
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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:
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Bridged Ethernet over ATM 1483 subinterfaces
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Fast Ethernet interfaces
Overview
■ 469
Chapter 15: Configuring Transparent Bridging