Cisco Systems BC-23 manual Configuring Transparent Bridging and SRT Bridging, BC-29

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Configuring Transparent Bridging

Transparent and SRT Bridging Configuration Task List

Configuring Transparent Bridging and SRT Bridging

To configure transparent and SRT bridging, you must perform the following tasks:

•Assigning a Bridge Group Number and Defining the Spanning-Tree Protocol

•Assigning Each Network Interface to a Bridge Group

•Choosing the OUI for Ethernet Type II Frames

Assigning a Bridge Group Number and Defining the Spanning-Tree Protocol

The first step in setting up your transparent bridging network is to define a Spanning-Tree Protocol and assign a bridge group number. You can choose either the IEEE 802.1D Spanning-Tree Protocol, the earlier DEC protocol upon which this IEEE standard is based or VLAN bridge Spanning Tree Protocol. Cisco expanded the original 802.1 D Spanning-Tree Protocol in Cisco IOS Release 12.1 by providing VLAN bridge Spanning-Tree Protocol support and increased port identification capability. Furthermore, the enhancement provides:

•More than one byte on a port number to distinguish interfaces

•An improved way to form the port ID

Port Number size of the Port ID support is applied only to IEEE and VLAN-bridge Spanning-Tree Protocols. The DEC protocol only has 8 bits on the Port ID, so the extension of the Port ID cannot be applied.

The expansion of the Port Number field into the port priority portion of the Port ID changes the useful values the port priority can be assigned.

The way to calculate the Port Path Cost is only supported in IEEE and VLAN-bridge Spanning-Tree Protocol environment.

To assign a bridge group number and define a Spanning-Tree Protocol, use the following command in global configuration mode:

Command

Purpose

 

 

bridge bridge-groupprotocol {ieee dec

Assigns a bridge group number and defines a Spanning-Tree Protocol

vlan-bridge}

as IEEE 802.1D standard, DEC or VLAN bridge.

 

 

The IEEE 802.1D Spanning-Tree Protocol is the preferred way of running the bridge. Use the DEC Spanning-Tree Protocol only for backward compatibility. The VLAN-bridge Spanning-Tree Protocol, introduced in Cisco IOS Release 12.1, supports the following media: Ethernet, fast Ethernet, FDDI, ATM and serial (HDLC, PPP, Frame Relay IETF, SMDS, x25).

Assigning Each Network Interface to a Bridge Group

A bridge group is an internal organization of network interfaces on a router. Bridge groups cannot be used outside the router on which it is defined to identify traffic switched within the bridge group. Bridge groups within the same router function as distinct bridges; that is, bridged traffic and bridge protocol data units (BPDUs cannot be exchanged between different bridge groups on a router. Furthermore, bridge groups cannot be used to multiplex or de-multiplex different streams of bridged traffic on a LAN. An interface can be a member of only one bridge group. Use a bridge group for each separately bridged (topologically distinct) network connected to the router. Typically, only one such network exists in a configuration.

Cisco IOS Bridging and IBM Networking Configuration Guide

BC-29

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Contents BC-23 Transparent and SRT BridgingIntegrated Routing and Bridging Transparent Bridging FeaturesBC-24 BC-25 Bridge-Group Virtual InterfaceBridge-Group Virtual Interface in the Router BC-26Other Considerations SRT Bridging FeaturesBC-27 BC-28 Transparent and SRT Bridging Configuration Task ListBC-29 Configuring Transparent Bridging and SRT BridgingAssigning Each Network Interface to a Bridge Group As Ieee 802.1D standard, DEC or Vlan bridgeBC-30 Command PurposeTransparently Bridged VLANs for ISL Choosing the OUI for Ethernet Type II FramesTransparently Bridged VLANs on an Fddi Backbone BC-31BC-32 Routing between ISL VLANsBC-33 Specifies a subinterfaceSubinterface with the Vlan Same bridge groupBC-34 Configuring a Subscriber Bridge GroupConfiguring Transparent Bridging over WANs Configuring Fast-Switched Transparent Bridging over ATMSpecifying the Bridging Protocol Configuring Transparent Bridging over DDRCommand Defining the Protocols to BridgeFast-Switched Transparent Bridging Configuring Transparent Bridging over Frame RelayDetermining Access for Bridging Configuring an Interface for BridgingBC-37 Configuring Transparent Bridging over Multiprotocol LapbBridging in a Frame Relay Network with No Multicasts Bridging in a Frame Relay Network with MulticastsBC-38 Configuring Transparent Bridging over SmdsConfiguring Transparent Bridging over Specifies IP-to-X.121 mappingBC-39 Configuring Concurrent Routing and BridgingConfiguring Integrated Routing and Bridging Specifies a protocol to be routed on a bridge groupBC-40 Configuring InterfacesConfiguring the Bridge-Group Virtual Interface Enabling Integrated Routing and BridgingBC-41 Configuring Protocols for Routing or BridgingDisabling 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 BC-45 Configuring Bridge Table Aging TimeFiltering Transparently Bridged Packets Forwarding Multicast AddressesBC-46 Setting Filters at the MAC LayerBC-47 Filters particular MAC-layer station addressesFiltering by Vendor Code Ethernet-ordered MAC addressType Filtering by Protocol TypeBC-48 BC-49 Defining and Applying Extended Access ListsConfiguration mode InterfaceBC-50 Enabling LAT Group Code Service Filtering Filtering LAT Service AnnouncementsBC-51 BC-52 Adjusting Spanning-Tree ParametersAssigning Path Costs Setting the Bridge PrioritySetting an Interface Priority Adjusting Bpdu IntervalsDefining the Maximum Idle Interval Adjusting the Interval between Hello BPDUsDefining the Forward Delay Interval Disabling the Spanning Tree on an InterfaceBC-55 BC-56 Configuring the PA-12E/2FE Port AdapterBC-57 Monitoring and Maintaining the PA-12E/2FE Port AdapterBC-58 BC-59 BC-60 Configuring Circuit GroupsBC-61 Configuring Constrained Multicast FloodingConfigures a transmission pause interval Distributes base load on the source MAC address onlyBC-62 BC-63 Basic Bridging ExampleBC-64 Concurrent Routing and Bridging ExampleBC-65 Basic Integrated Routing and Bridging ExampleBC-66 Complex Integrated Routing and Bridging ExampleBC-67 Transparently Bridged VLANs Configuration ExampleRouter Two Router OneBC-68 BC-69 Router ThreeEthernet-to-FDDI Transparent Bridging Example Routing between VLANs Configuration ExampleBC-70 Router/Bridge in Building Ethernet Bridging ExampleBC-71 BC-72 SRT Bridging ExampleBC-73 Configuration for the New York City RouterConfiguration for the Thule, Greenland Router Multicast or Broadcast Packets Bridging ExampleTransparent 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 BC-77 Transparent Bridging over DDR ExamplesComplex Transparent Bridging Network Topology Example Fast-Switched Transparent Bridging over Smds ExampleBC-78 Bridged Subnetworks with Domains BC-79BC-80 Configuration for Router aBC-81 Configuration for Router BConfiguration for Router C Configuration for Router DATM Subscriber Ports, ATM Trunk Example Fast Ethernet Subscriber Port, Frame Relay Trunk ExampleBC-82 BC-83 BC-84 Configuration of IRB for PA-12E/2FE Port Adapter Example

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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