Cisco Systems BC-23 Configuring Transparent Bridging over Smds, Specifies IP-to-X.121 mapping

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Configuring Transparent Bridging

Transparent and SRT Bridging Configuration Task List

Configuring Transparent Bridging over SMDS

We support fast-switched transparent bridging for Switched Multimegabit Data Service (SMDS) encapsulated serial and HSSI networks. Standard bridging commands are used to enable bridging on an SMDS interface.

To enable transparent bridging over SMDS, use the following commands beginning in global configuration mode:

 

Command

Purpose

Step 1

 

 

interface serial number

Specifies the serial interface.

Step 2

 

 

encapsulation smds

Configures SMDS encapsulation on the serial interface.

Step 3

 

 

bridge-group bridge-group

Associates the interface with a bridge group.

Step 4

 

 

smds multicast bridge smds-address

Enables transparent bridging of packets across an SMDS network.

 

 

 

Broadcast Address Resolution Protocol (ARP) packets are treated differently in transparent bridging over an SMDS network than in other encapsulation methods. For SMDS, two packets are sent to the multicast address. One is sent using a standard (SMDS) ARP encapsulation; the other is sent with the ARP packet encapsulated in an 802.3 MAC header. The native ARP is sent as a regular ARP broadcast.

Our implementation of IEEE 802.6i transparent bridging for SMDS supports 802.3, 802.5, and FDDI frame formats. The router can accept frames with or without frame check sequence (FCS). Fast-switched transparent bridging is the default and is not configurable. If a packet cannot be fast switched, it is process switched.

An example configuration is provided in the section “Fast-Switched Transparent Bridging over SMDS Example” later in this chapter. For more information on SMDS, refer to the “Configuring SMDS” chapter in the Cisco IOS Wide-Area Networking Configuration Guide.

Configuring Transparent Bridging over X.25

The transparent bridging software supports bridging of packets in X.25 frames. This ability is useful for such tasks as transmitting packets from proprietary protocols across an X.25 network.

The X.25 bridging software uses the same spanning-tree algorithm as the other bridging functions, but allows packets to be encapsulated in X.25 frames and transmitted across X.25 media. You specify the IP-to-X.121 address mapping, and the system maintains a table of both the Ethernet and X.121 addresses. To configure X.25 transparent bridging, use the following command in interface configuration mode:

Command

Purpose

 

 

x25 map bridge x.121-addressbroadcast

Specifies IP-to-X.121 mapping.

[options-keywords]

 

 

 

For more information about configuring X.25, refer to the “Configuring X.25 and LAPB” chapter in the Cisco IOS Wide-Area Networking Configuration Guide.

Cisco IOS Bridging and IBM Networking Configuration Guide

BC-38

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Contents Transparent and SRT Bridging BC-23Integrated Routing and Bridging Transparent Bridging FeaturesBC-24 Bridge-Group Virtual Interface BC-25BC-26 Bridge-Group Virtual Interface in the RouterOther Considerations SRT Bridging FeaturesBC-27 Transparent and SRT Bridging Configuration Task List BC-28Configuring Transparent Bridging and SRT Bridging Assigning Each Network Interface to a Bridge GroupAs Ieee 802.1D standard, DEC or Vlan bridge BC-29Command Purpose Transparently Bridged VLANs for ISLChoosing the OUI for Ethernet Type II Frames BC-30BC-31 Transparently Bridged VLANs on an Fddi BackboneRouting between ISL VLANs BC-32Specifies a subinterface Subinterface with the VlanSame bridge group BC-33Configuring a Subscriber Bridge Group Configuring Transparent Bridging over WANsConfiguring Fast-Switched Transparent Bridging over ATM BC-34Configuring Transparent Bridging over DDR CommandDefining the Protocols to Bridge Specifying the Bridging ProtocolConfiguring Transparent Bridging over Frame Relay Determining Access for BridgingConfiguring an Interface for Bridging Fast-Switched Transparent BridgingConfiguring Transparent Bridging over Multiprotocol Lapb Bridging in a Frame Relay Network with No MulticastsBridging in a Frame Relay Network with Multicasts BC-37Configuring Transparent Bridging over Smds Configuring Transparent Bridging overSpecifies IP-to-X.121 mapping BC-38Configuring Concurrent Routing and Bridging Configuring Integrated Routing and BridgingSpecifies a protocol to be routed on a bridge group BC-39Configuring Interfaces Configuring the Bridge-Group Virtual InterfaceEnabling Integrated Routing and Bridging BC-40Configuring Protocols for Routing or Bridging BC-41Disabling IP Routing Configuring Transparent Bridging OptionsBC-42 Enabling Autonomous Bridging Configuring LAT CompressionBC-43 Establishes a multiple spanning-tree domain Establishing Multiple Spanning-Tree DomainsBC-44 Configuring Bridge Table Aging Time Filtering Transparently Bridged PacketsForwarding Multicast Addresses BC-45Setting Filters at the MAC Layer BC-46Filters particular MAC-layer station addresses Filtering by Vendor CodeEthernet-ordered MAC address BC-47Type Filtering by Protocol TypeBC-48 Defining and Applying Extended Access Lists Configuration modeInterface BC-49BC-50 Enabling LAT Group Code Service Filtering Filtering LAT Service AnnouncementsBC-51 Adjusting Spanning-Tree Parameters BC-52Setting the Bridge Priority Setting an Interface PriorityAdjusting Bpdu Intervals Assigning Path CostsAdjusting the Interval between Hello BPDUs Defining the Forward Delay IntervalDisabling the Spanning Tree on an Interface Defining the Maximum Idle IntervalBC-55 Configuring the PA-12E/2FE Port Adapter BC-56Monitoring and Maintaining the PA-12E/2FE Port Adapter BC-57BC-58 BC-59 Configuring Circuit Groups BC-60Configuring Constrained Multicast Flooding Configures a transmission pause intervalDistributes base load on the source MAC address only BC-61BC-62 Basic Bridging Example BC-63Concurrent Routing and Bridging Example BC-64Basic Integrated Routing and Bridging Example BC-65Complex Integrated Routing and Bridging Example BC-66Transparently Bridged VLANs Configuration Example BC-67Router Two Router OneBC-68 Router Three BC-69Ethernet-to-FDDI Transparent Bridging Example Routing between VLANs Configuration ExampleBC-70 Router/Bridge in Building Ethernet Bridging ExampleBC-71 SRT Bridging Example BC-72Configuration for the New York City Router Configuration for the Thule, Greenland RouterMulticast or Broadcast Packets Bridging Example BC-73Transparent Bridging Example Configuration for BridgeBC-74 Bridging in a Frame Relay Network with No Multicasts Frame Relay Transparent Bridging ExamplesBC-75 Bridging in a Frame Relay Network with Multicasts Transparent Bridging over Multiprotocol Lapb ExampleBC-76 Transparent Bridging over DDR Examples BC-77Complex Transparent Bridging Network Topology Example Fast-Switched Transparent Bridging over Smds ExampleBC-78 BC-79 Bridged Subnetworks with DomainsConfiguration for Router a BC-80Configuration for Router B Configuration for Router CConfiguration for Router D BC-81ATM Subscriber Ports, ATM Trunk Example Fast Ethernet Subscriber Port, Frame Relay Trunk ExampleBC-82 BC-83 Configuration of IRB for PA-12E/2FE Port Adapter Example BC-84

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.

One of the standout features of the Cisco BC-23 is its advanced networking capabilities. It supports high-speed data transmission, enabling seamless communication across networks. With multi-gigabit Ethernet ports, the BC-23 facilitates faster data rates, accommodating the increasing bandwidth demands of modern applications. This feature is particularly beneficial for businesses that rely heavily on cloud services, video conferencing, and data-heavy applications.

Security is a top priority, and the Cisco BC-23 incorporates cutting-edge security measures. Integrated threat detection and prevention systems help safeguard sensitive data from cyber threats. Additionally, the device supports secure access protocols, ensuring that only authorized users can connect to the network. This multi-layered security approach not only protects the network infrastructure but also secures the integrity of the data being transmitted.

Another significant characteristic of the BC-23 is its support for software-defined networking (SDN). This technology allows businesses to manage their networks through centralized software applications, facilitating real-time adjustments and optimizations. The flexibility afforded by SDN is especially advantageous in dynamic environments where network demands can shift rapidly.

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.

Furthermore, the BC-23 is designed for scalability. As organizations grow, their networking needs evolve, and the BC-23 can easily adapt to these changes. Businesses can add additional devices and capabilities without the need for a complete overhaul of their existing infrastructure.

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.
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