Configuring Transparent Bridging

Transparent and SRT Bridging Configuration Task List

Support for RFC 1483 was added in Cisco IOS Release 12.0(3)T, enabling transparent bridging between Token Ring LANs (using AAL5-SNAP PVCs) and LANs, VLANs or ELANS (using bridged PDUs). RFC 1483 defines an encapsulation type for transferring LAN data via ATM networks.

For more information on configuring ATM, refer to the “Configuring ATM” chapter in the Cisco IOS Wide-Area Networking Configuration Guide.

Configuring Transparent Bridging over DDR

The Cisco IOS software supports transparent bridging over dial-on-demand routing (DDR) and provides you some flexibility in controlling access and configuring the interface.

To configure DDR for bridging, complete the tasks in the following sections:

Defining the Protocols to Bridge

Specifying the Bridging Protocol

Determining Access for Bridging

Configuring an Interface for Bridging

For an example of configuring transparent bridging over DDR, see the section “Transparent Bridging over DDR Examples” section.

Defining the Protocols to Bridge

IP packets are routed by default unless they are explicitly bridged; all others are bridged by default unless they are explicitly routed.

To bridge IP packets, use the following command in global configuration mode:

Command

no ip routing

Purpose

Disables IP routing.

If you choose not to bridge another protocol, use the relevant command to enable routing of that protocol. For more information about tasks and commands, refer to the relevant protocol chapters in the following publications:

Cisco IOS IP and IP Routing Configuration Guide

Cisco IOS AppleTalk and Novell IPX Configuration Guide

Cisco IOS Apollo Domain, Banyan VINES, DECnet, ISO CLNS, and XNS Configuration Guide

Specifying the Bridging Protocol

You must specify the type of spanning-tree bridging protocol to use and also identify a bridge group. To specify the Spanning-Tree Protocol and a bridge group number, use the following command in global configuration mode:

Command

Purpose

 

 

bridge bridge-groupprotocol {ieee dec

Defines the type of spanning tree protocol and identify a bridge group.

vlan-bridge}

 

 

 

The bridge-group number is used when you configure the interface and assign it to a bridge group. Packets are bridged only among members of the same bridge group.

Cisco IOS Bridging and IBM Networking Configuration Guide

BC-35

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Cisco Systems BC-23 manual Configuring Transparent Bridging over DDR, Defining the Protocols to Bridge, Command, BC-35

BC-23 specifications

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The Cisco BC-23 also offers enhanced management features, allowing IT teams to monitor network performance and analytics effectively. This visibility into network operations enables organizations to identify potential issues before they escalate, minimizing downtime and keeping business processes smooth.

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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.