Tips on how to Find a Network Switch
The network switch is the most common network device implemented with company infrastructure and thus the selection of any new switches or upgrading is often a key part of most network design projects. The Cisco network switch components include Switch Chassis, Supervisor Engine, Switching Modules, IOS/CatOS software and Power Supplies. The choice to buy new switches or upgrade equipment will be determined after considering the network assessment and style features specified. Wireless designs, for instance, could have network switches interfacing with access points. That will have an affect on the switch like increased utilization, assigned switch ports, access control lists, Trunking, Spanning Tree Protocol and increased wattage draw from Control of Ethernet (PoE).
The Switch Chassis features include - chassis dimensions, quantity of slots, processor slot assignments, switching fabric, engines types supported, power supplies, rack units needed.
Cisco switches are implemented by having an Engine (Switch Processor) for processing packets with a network segment. Routing is accomplished having an on-board Multi Layer Switch Feature Card (MSFC) or Route Processor running IOS code. The switch Engine running IOS code on the MSFC and also the switch processor is within native mode, while those running CatOS about the processor are in hybrid mode. Some engines won't support native and hybrid mode. The engine with no MSFC supports what is known as CatOS mode. Pick the engine which fits your design specifications. The MSFC module is integrated with the Engine or upgradeable. You have to implement a PFC module with any MSFC. Some Engines have zero MSFC module - the routing is integrated together with the hardware and as such support native mode only.
Cisco network switches may be deployed with IOS, IOS and CatOS or exclusive CatOS software. Design features determine what mode and IOS or CatOS version is chosen. The application running along the way Processor has to be IOS whilst the Engine Switch Processor will run IOS (native mode) or CatOS (hybrid mode). Some Cisco equipment including the 4507R deploy the Supervisor Engine IV without MSFC onboard. The path Processor is integrated together with the engine. With this design, the Engine IV doesn't support CatOS.
Native IOS - deployed in the network edge where most routing occurs and some switching should be used
Hybrid - deployed at the network core its keep is both routing as well as speed switching
CatOS - deployed with the network access layer where there is switching with no routing
Switch Shopping process? The next describes the 5 the different parts of any network switch process:
1. Look at the network assessment and design features specified
2. Select switches which include all the design features
3. Select switches with proper scalability
4. Balance cost and equipment features while meeting budget guidelines
5. Select IOS and/or CatOS software version
The Network Assessment and style specifications should be thought about before selecting any network switches. The network assessment examines the structure, configuration and equipment that's implemented in the office the location where the selected devices will probably be deployed. The design specifications will determine performance, availability and scalability features needed. Choosing the IOS and/or CatOS version occur after seeking the set of features. Companies will specify a financial budget which is actually key consideration with any equipment selection. It's not affordable to choose a Cisco 6509 switch on an office with 50 employees. It is vital that you decide on equipment that match the design specifications, has the scalability features needed while meeting budget guidelines.
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