Cajun P550 Switch Overview

Figure 1-2 illustrates a conceptual diagram of the Layer 3 supervisor module’s functions.

Figure 1-2.Layer 3 Supervisor Module Conceptual Operation

 

Wirespeed Routing

 

High-

in Hardware

 

Speed

 

 

Manage-

Software-based

Access

ment

Routing

To /

Inter-

 

 

High-speed

System

From

faces

Switch

CPU

management

 

Fabric

Routing Table and

 

 

 

Cache Management

Multilayer Supervisor Conceptual Diagram

Media Modules

All Layer 2 and Layer 3 media modules have full non-blocking performance.

Bridging and routing are performed on the input side of each media module.

Each media module features:

❒IEEE 802.3z full-duplex flow control - This allows the switch ports to send a pause command before input buffers overflow. Half-duplex ports support active backpressure (jamming).

❒VLAN trunking or non-tagged access modes - This allows the switch ports to interoperate with popular tagged trunking schemes used by large networking vendors.

❒Priority Queuing and Class of Service - These features allow you to prioritize traffic between particular stations or sets of stations to support jitter-sensitive applications. Supported class of service types: 3Com PACE CoS, IEEE 802.1p CoS.

Layer 3 and Layer 2 Fast Ethernet Modules

The Layer 2 (L2) and Layer 3 (L3) Fast Ethernet modules include:

❒20-Port 10/100Base-TX Ethernet Module (L2 support), with 20 RJ-45 Ports - 10/100, HDX/FDX

❒10-Port 100Base-FX Ethernet Module (L2 support), with 10 Fast Ethernet Ports - Fiber, 1300 nM, HDX/FDX

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Cajun P550/P220 Switch Operation Guide