Configuring Transparent Bridging

Transparent and SRT Bridging Configuration Task List

Bridging in a Frame Relay Network with No Multicasts

The Frame Relay bridging software uses the same spanning-tree algorithm as the other bridging functions, but allows packets to be encapsulated for transmission across a Frame Relay network. You specify IP-to-data-link connection identifier (DLCI) address mapping and the system maintains a table of both the Ethernet address and the DLCIs.

To configure bridging in a network that does not support a multicast facility, define the mapping between an address and the DLCI used to connect to the address. To bridge with no multicasts, use the following command in interface configuration mode:

Command

Purpose

 

 

frame-relay map bridge dlci broadcast

Defines the mapping between an address and the DLCI used to

 

connect to the address.

 

 

An example configuration is provided in the section “Frame Relay Transparent Bridging Examples” at the end of this chapter. Frame Relay is discussed in more detail in the “Configuring Frame Relay” chapter in the Cisco IOS Wide-Area Networking Configuration Guide.

Bridging in a Frame Relay Network with Multicasts

The multicast facility is used to learn about the other bridges on the network, eliminating the need for you to specify any mappings with the frame-relay map bridge broadcast command. An example configuration is provided in the section “Frame Relay Transparent Bridging Examples” at the end of the chapter for use as a configuration guide. Frame Relay is discussed in more detail in the “Configuring Frame Relay” chapter in the Cisco IOS Wide-Area Networking Configuration Guide.

Configuring Transparent Bridging over Multiprotocol LAPB

Cisco IOS software implements transparent bridging over multiprotocol Link Access Protocol-Balanced (LAPB) encapsulation on serial interfaces. To configure transparent bridging over multiprotocol LAPB, use the following commands beginning in global configuration mode:

 

Command

Purpose

Step 1

 

 

interface serial number

Specifies the serial interface.

Step 2

 

 

no ip address

Specifies no IP address to the interface.

Step 3

 

 

encapsulation lapb multi

Configures multiprotocol LAPB encapsulation.

Step 4

 

 

bridge-group bridge-group

Assigns the interface to a bridge group.

Step 5

 

 

bridge bridge-groupprotocol {ieee dec vlan-bridge}

Specifies the type of Spanning-Tree Protocol.

 

 

 

Note Transparent bridging over multiprotocol LAPB requires use of the encapsulation lapb multi command. You cannot use the encapsulation lapb protocol command with a bridge keyword to configure this feature.

For an example of configuring transparent bridging over multiprotocol LAPB, see the “Transparent Bridging over Multiprotocol LAPB Example” section on page 76”.

Cisco IOS Bridging and IBM Networking Configuration Guide

BC-37

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Cisco Systems BC-23 manual Configuring Transparent Bridging over Multiprotocol Lapb, BC-37

BC-23 specifications

Cisco Systems has long been a leader in the networking industry, and its BC-23 model exemplifies the company's commitment to innovation and performance. Aimed at enhancing business operations, the BC-23 is tailored for organizations looking for robust solutions that support their digital transformation efforts.

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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.