Configuring Transparent Bridging

Transparent and SRT Bridging Configuration Task List

Configuring a Subscriber Bridge Group

The Digital Subscriber Line (xDSL) bridge support feature enables you to configure a router for intelligent bridge flooding for xDSL and other bridge applications. To configure a subscriber bridge group, use the following commands, beginning in global configuration mode:

 

Command

Purpose

Step 1

 

 

bridge bridge-groupprotocol {ieee

Defines the bridge Spanning-Tree Protocol.

 

dec vlan-bridge}

 

Step 2

 

 

bridge bridge-groupsubscriber-policy

Defines a subscriber bridge group and specifies the subscriber policy

 

policy

for the group.

Step 3

 

 

subscriber-policy policy [[no]

Defines or modifies the forward and filter decisions of the subscriber

 

[default] packet [permit] [deny]]

policy.

Step 4

 

 

interface type number

Configures a subinterface.

Step 5

 

 

bridge-group bridge-group

Assigns a subscriber bridge group and indicates whether the

 

[subscriber-trunk]

interface is upstream or downstream from the traffic flow.

 

 

 

Note Standard access lists can coexist with the subscriber policy. However, subscriber policy will take precedence over the access list by being checked first. A packet permitted by the subscriber policy will be checked against the access list if it is specified. A packet denied by subscriber policy will be dropped with no further access list checking.

Configuring Transparent Bridging over WANs

You can configure transparent bridging over a variety of networks, as described in the following sections:

Configuring Fast-Switched Transparent Bridging over ATM, page 34

Configuring Transparent Bridging over DDR, page 35

Configuring Transparent Bridging over Frame Relay, page 36

Configuring Transparent Bridging over Multiprotocol LAPB, page 37

Configuring Transparent Bridging over SMDS, page 38

Configuring Transparent Bridging over X.25, page 38

Configuring Fast-Switched Transparent Bridging over ATM

Our bridging implementation supports IEEE 802.3 frame formats and IEEE 802.10 frame formats. Our implementation can transparently bridge ARPA style Ethernet packets (also known as Ethernet version 2).

Fast-switched transparent bridging over Asynchronous Transfer Mode (ATM) supports AAL5-SNAP encapsulated packets only. All bridged AAL5-SNAP encapsulated packets are fast switched. Fast-switched transparent bridging supports Ethernet, FDDI, and Token Ring packets sent in AAL5-SNAP encapsulation over ATM. See the section “Fast-Switched Transparent Bridging over ATM Example (Cisco 7000)” for an example configuration of fast-switched transparent bridging over ATM.

Cisco IOS Bridging and IBM Networking Configuration Guide

BC-34

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Cisco Systems BC-23 manual Configuring a Subscriber Bridge Group, Configuring Transparent Bridging over WANs, BC-34

BC-23 specifications

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With its combination of speed, security, and scalability, the Cisco Systems BC-23 is an invaluable asset for modern businesses. It stands out not just as a networking device but as a comprehensive solution that meets the demands of today's fast-paced, technology-driven environment. As companies continue to leverage digital tools for growth and efficiency, the BC-23 will undoubtedly play a significant role in their success.