Configuring Transparent Bridging

Technology Overview

Transparent Bridging Features

Cisco’s transparent bridging software implementation has the following features:

Complies with the IEEE 802.1D standard.

Provides the ability to logically segment a transparently bridged network into virtual LANs.

Provides two Spanning-Tree Protocols—an older bridge protocol data unit (BPDU) format that is compatible with Digital Equipment Corporation (DEC) and other LAN bridges for backward compatibility and the IEEE standard BPDU format. In addition to features standard with these spanning-tree protocols, Cisco’s proprietary software provides for multiple domains for spanning trees. The spanning-tree parameters are configurable.

Allows frame filtering based on Media Access Control (MAC) address, protocol type, or the vendor code. Additionally, the bridging software can be configured to selectively filter local-area transport (LAT) multicast service announcements.

Provides deterministic load distribution while maintaining a loop-free spanning tree.

Provides the ability to bridge over Asynchronous Transfer Mode (ATM), dial-on-demand routing (DDR), FDDI, Frame Relay, multiprotocol Link Access Procedure, Balanced (LAPB), Switched Multimegabit Data Service (SMDS), and X.25 networks.

Provides concurrent routing and bridging, which is the ability to bridge a given protocol on some interfaces in a router and concurrently route that protocol on other interfaces in the same router.

Provides integrated routing and bridging, which is the ability to route a given protocol between routed interfaces and bridge groups, or to route a given protocol between bridge groups.

Provides fast-switched transparent bridging for Frame Relay encapsulated serial and High-Speed Serial Interface (HSSI) interfaces, according to the format specified in RFC 1490.

Provides fast-switched transparent bridging for the ATM interface on the Cisco 7000, Cisco 4500, and Cisco 4000 series routers, according to the format specified in RFC 1483.

Provides for compression of LAT frames to reduce LAT traffic through the network.

Provides both bridging and routing of VLANs.

Cisco access servers and routers can be configured to serve as both multiprotocol routers and MAC-level bridges, bridging any traffic that cannot otherwise be routed. For example, a router routing the Internet Protocol (IP) can also bridge DEC’s LAT protocol or NetBIOS traffic.

Cisco routers also support remote bridging over synchronous serial lines. As with frames received on all other media types, dynamic learning and configurable filtering applies to frames received on serial lines.

Transit bridging of Ethernet frames across FDDI media is also supported. The term transit refers to the fact that the source or destination of the frame cannot be on the FDDI media itself. This allows FDDI to act as a highly efficient backbone for the interconnection of many bridged networks. The configuration of FDDI transit bridging is identical to the configuration of transparent bridging on all other media types.

Integrated Routing and Bridging

While concurrent routing and bridging makes it possible to both route and bridge a specific protocol on separate interfaces within a router, the protocol is not switched between bridged and routed interfaces. Routed traffic is confined to the routed interfaces; bridged traffic is confined to bridged interfaces. A specified protocol may be either routed or bridged on a given interface, but not both.

Cisco IOS Bridging and IBM Networking Configuration Guide

BC-24

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Cisco Systems BC-23 manual Transparent Bridging Features, Integrated Routing and Bridging, BC-24

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.