Configuring Transparent Bridging

Transparent and SRT Bridging Configuration Task List

Filtering by Specific MAC Address

You can filter frames with a particular MAC-layer station source or destination address. Any number of addresses can be configured into the system without a performance penalty. To filter by MAC-layer address, use the following command in global configuration mode:

Command

Purpose

 

 

bridge bridge-group address mac-address {forward

Filters particular MAC-layer station addresses.

discard}[interface]

 

 

 

When filtering specific MAC destination addresses, allow for multicast or broadcast packets that are required by the bridged network protocols. Refer to the example in the section “Multicast or Broadcast Packets Bridging Example” later in this chapter to guide you in building your configuration to allow for multicast or broadcast packets.

Filtering by Vendor Code

The bridging software allows you to create access lists to administratively filter MAC addresses. These access lists can filter groups of MAC addresses, including those with particular vendor codes. There is no noticeable performance loss in using these access lists, and the lists can be of indefinite length. You can filter groups of MAC addresses with particular vendor codes by performing the first task and one or both of the other tasks that follow:

•Establish a vendor code access list

•Filter source addresses

•Filter destination addresses

To establish a vendor code access list, use the following command in global configuration mode:

Command

Purpose

 

 

access-list access-list-number{permit

Prepares access control information for filtering of frames by canonical

deny} address mask

(Ethernet-ordered) MAC address.

 

 

The vendor code is the first three bytes of the MAC address (left to right). For an example of how to filter by vendor code, see “Multicast or Broadcast Packets Bridging Example” later in this chapter.

Note Remember that, as with any access list using MAC addresses, Ethernets swap their MAC address bit ordering, and Token Rings and FDDI do not. Therefore, an access list that works for one medium might not work for others.

Once you have defined an access list to filter by a particular vendor code, you can assign an access list to a particular interface for filtering on the MAC source addresses of packets received on that interface or the MAC destination addresses of packets that would ordinarily be forwarded out that interface. To filter by source or destination addresses, use one of the following commands in interface configuration mode:

Cisco IOS Bridging and IBM Networking Configuration Guide

BC-47

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Cisco Systems BC-23 Filters particular MAC-layer station addresses, Filtering by Vendor Code, Ethernet-ordered MAC address
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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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