Chapter 2: Bridging Configuration Guide

Note: WAN interfaces on the SSR do not currently support Spanning Tree operations. However, future implementations of WAN for the SSR family of routers will support Spanning Tree.

Bridging Modes (Flow-Based and Address-Based)

The SSR provides the following types of wire-speed bridging:

Address-based bridging - The SSR performs this type of bridging by looking up the destination address in an L2 lookup table on the line card that receives the bridge packet from the network. The L2 lookup table indicates the exit port(s) for the bridged packet. If the packet is addressed to the SSR's own MAC address, the packet is routed rather than bridged.

Flow-based bridging - The SSR performs this type of bridging by looking up an entry in the L2 lookup table containing both the source and destination addresses of the received packet in order to determine how the packet is to be handled.

The SSR ports perform address-based bridging by default but can be configured to perform flow-based bridging instead, on a per-port basis. A port cannot be configured to perform both types of bridging at the same time.

The SSR performance is equivalent when performing flow-based bridging or address- based bridging. However, address-based bridging is more efficient because it requires fewer table entries while flow-based bridging provides tighter management and control over bridged traffic.

VLAN Overview

Virtual LANs (VLANs) are a means of dividing a physical network into several logical (virtual) LANs. The division can be done on the basis of various criteria, giving rise to different types of VLANs. For example, the simplest type of VLAN is the port-based VLAN. Port-based VLANs divide a network into a number of VLANs by assigning a VLAN to each port of a switching device. Then, any traffic received on a given port of a switch belongs to the VLAN associated with that port.

VLANs are primarily used for broadcast containment. A layer-2 (L2) broadcast frame is normally transmitted all over a bridged network. By dividing the network into VLANs, the range of a broadcast is limited, i.e., the broadcast frame is transmitted only to the VLAN to which it belongs. This reduces the broadcast traffic on a network by an appreciable factor.

The type of VLAN depends upon one criterion: how a received frame is classified as belonging to a particular VLAN. VLANs can be categorized into the following types:

•Port based

34

SmartSwitch Router User Reference Manual

Page 33 Page 35
Page 34
Image 34
Cabletron Systems 9032578-02 manual Vlan Overview, Bridging Modes Flow-Based and Address-Based
Page 33 Page 35

9032578-02 specifications

Cabletron Systems 9032578-02 is a notable component in the realm of networking equipment, especially recognized for its robust performance and reliability. As part of Cabletron’s commitment to delivering high-quality networking solutions, this device has become integral for many organizations seeking efficient data management.

One of the standout features of the 9032578-02 is its advanced switching capabilities. With the ability to manage multiple data streams seamlessly, it ensures that data packets are routed efficiently, minimizing latency and maximizing throughput. This is particularly crucial in environments where high-volume data transfer is the norm, such as in data centers or enterprises with extensive digital infrastructures.

The device is equipped with various connectivity options that enhance its versatility. These include support for multiple types of network interfaces, allowing for easy integration into existing systems. Whether it's Ethernet connections or fiber optics, the 9032578-02 accommodates diverse network requirements, making it suitable for various applications across different industries.

In terms of technology, the Cabletron Systems 9032578-02 employs cutting-edge networking protocols that ensure secure and reliable communication. This includes support for both IPv4 and IPv6 protocols, which future-proofs the device as organizations transition to newer standards. The incorporation of Quality of Service (QoS) features further enhances its capability to prioritize critical network traffic, ensuring that bandwidth-intensive applications receive the necessary resources for optimal performance.

Another critical characteristic of the 9032578-02 is its scalability. Organizations can expand their network infrastructure without the need for complete system overhauls. This modularity allows businesses to grow and adapt to changing demands while maintaining investment in their existing technology.

Additionally, Cabletron integrates advanced monitoring and management tools within the 9032578-02. Network administrators can easily track performance metrics, analyze traffic patterns, and troubleshoot issues in real-time. This level of visibility is essential for maintaining a stable network environment, particularly in dynamic organizational settings.

In summary, Cabletron Systems 9032578-02 is synonymous with high performance, scalability, and advanced technology. Its comprehensive features make it an excellent choice for organizations requiring reliable networking solutions that can adapt to evolving demands and ensure efficient data communication across their systems.
Top Page Image Contents