Bridging

Data Type

Displays the hexadecimal two-byte Þeld for the Þlter which can be used to mask out a speciÞed protocol type Þeld. Examples of protocol type are:

¥0800 = IP

¥8137 = Novell

¥0bad = Banyan

¥80f3 = AppletalkARP

Data Offset

Indicates the offset (in bytes, from the beginning of the data in the packet) where the Data Mask will be applied. The default for this Þeld is 0000 (no data offset). An example of a valid offset to enter into this Þeld is 0016 (16 bytes).

Data Mask

Displays the 64-byte overlay used to Þlter packets. The Data Mask is applied to the packet after the Þxed part of the packet, which includes Source Address, Destination Address, and Type Þelds. The Þlter applies the mask directly at the start of the data portion of the packet unless there is a Data Offset. If a Data Offset has been deÞned, the mask will apply to the data that comes after the speciÞed offset in the packet.

Receive Port(s)

Indicates the ports at which the packet must be received for Þltering information to be applied. Note that you can only immediately see one receive port per Þlter, even though you can set more than one receive port for the Þltering action to apply. The receive port Þeld can display each device bridge port, BRIM port, or Ò*Ó. The Ò*Ó indicates that a packet can be received at any port for the Þlter to apply (i.e., the port is promiscuous).

Port Filtering

forwarding Indicates the forwarding/blocking information for the Þlter at each port on the device. Note that you can only view two ports at a time.

blocking

Use the scroll bar at the top of the column to view the

 

hidden ports.

Selected Filter

This Þeld, visible at the bottom of the window, displays the number of the Þlter that is currently highlighted. The possible range is from 01-19.

Defining and Editing Filters in the Special Database

You can edit an existing Þlter or deÞne a new Þlter using the following steps:

1.Click to select the filter you wish to edit. (The filter is selected when it is highlighted. When the bridge uses the Special Database, it starts with the lowest numbered enabled filter.)

Ethernet and Token Ring Special Filter Databases

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Cabletron Systems CSX200, CSX400 manual Defining and Editing Filters in the Special Database
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CSX200, CSX400 specifications

Cabletron Systems was a leading developer of networking solutions, and its CSX400 and CSX200 series of high-performance switches represent some of the key innovations in the field of enterprise networking during their time. Both models were geared towards enhancing network reliability, efficiency, and speed, particularly in environments where heavy data traffic and complex networking demands were prevalent.

The CSX400, designed for larger enterprises, boasts a robust architecture capable of handling significant throughput. One of its standout features is its stackable design, allowing multiple switches to be interconnected and managed seamlessly as a single unit. This scalability provides organizations with the flexibility to expand their networks without significant infrastructure overhauls. The CSX400 supports various Ethernet standards, including 10/100 Ethernet and Gigabit Ethernet, positioning it to effectively manage both legacy and modern networking requirements.

In addition to its scalability, the CSX400 is distinguished by its advanced Layer 2 and Layer 3 routing capabilities. This dual-layer functionality enables efficient data handling and is instrumental in managing traffic between different network segments. Moreover, the switch incorporates features like VLAN (Virtual Local Area Network) support and Quality of Service (QoS) prioritization, allowing for enhanced performance of critical applications and streamlined bandwidth allocation.

On the other hand, the CSX200 series is tailored for smaller enterprises or branch offices needing a reliable yet efficient networking solution. Despite its compact design, the CSX200 is equipped with essential features that promote effective network management and security. It offers a simplified management interface, making it user-friendly for network administrators. The switch also provides essential access control measures, employing technologies like IEEE 802.1X for network access security.

Both the CSX400 and CSX200 prioritize performance through the incorporation of advanced switching technologies. They support features such as Spanning Tree Protocol (STP), enabling loop-free topologies and enhanced network resilience. These attributes are particularly crucial in dynamic networking environments where downtime can have significant repercussions on business operations.

Overall, Cabletron Systems' CSX400 and CSX200 series represent a blend of scalability, advanced routing capabilities, and user-friendly management, making them vital assets for organizations looking to optimize their network infrastructure during a period of rapid technological evolution. With their rich feature sets and unwavering performance, these switches helped pave the way for modern networking solutions that cater to diverse enterprise needs.
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