The network switch is the most common network device implemented with company infrastructure and therefore picking a any new switches or upgrading can be a key part of all network design projects. The Cisco network switch components include Switch Chassis, Supervisor Engine, Switching Modules, IOS/CatOS software and Power Supplies. Careful analysis buy new switches or upgrade equipment will be determined after with the network assessment and style features specified. Wireless designs, for example, can have network switches interfacing with access points. Which will affect the switch for example increased utilization, assigned switch ports, access control lists, Trunking, Spanning Tree Protocol and increased wattage tap into Management of Ethernet (PoE).
The Switch Chassis features include – chassis dimensions, amount of slots, processor slot assignments, switching fabric, engines types supported, power supplies, rack units needed.
Cisco switches are implemented with an Engine (Switch Processor) for processing packets on a network segment. Routing is accomplished with the on-board Multi Layer Switch Feature Card (MSFC) or Route Processor running IOS code. The switch Engine running IOS code for the MSFC and also the switch processor is at native mode, while those running CatOS around the processor have been in hybrid mode. Some engines won’t support native and hybrid mode. The engine with no MSFC supports what is called CatOS mode. Select the engine which fits your design specifications. The MSFC module is integrated together with the Engine or upgradeable. You should implement a PFC module with any MSFC. Some Engines don’t have any MSFC module – the routing is integrated using the hardware and thus support native mode only.
Cisco network switches can 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 on the way Processor has to be IOS as
the Engine Switch Processor will run IOS (native mode) or CatOS (hybrid mode).
Some Cisco equipment like the 4507R deploy the Supervisor Engine IV without
having MSFC onboard. The path Processor is integrated together with the engine.
Achievable design, the Engine IV doesn’t support CatOS.
Native IOS – deployed at the network edge where most routing occurs plus some switching is necessary
Hybrid – deployed with the network core its keep is both routing as well as speed switching
CatOS – deployed with the network access layer where there is switching and no routing
Switch Process? The next describes the 5 pieces of any network switch buying process:
1. Think about the network assessment and design features specified
2. Select switches offering every one of 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 design specifications should be considered before purchasing any network switches. The network assessment examines the design, configuration and equipment that’s implemented at the office in which the selected devices will probably be deployed. The style specifications determines performance, availability and scalability features needed. Choosing the IOS and/or CatOS version occur after selecting the set of features. Companies specify a financial budget which is actually a key consideration with any equipment selection. It isn’t economical to select a Cisco 6509 switch for an office with 50 employees. It is important that you choose equipment that fulfill the design specifications, has got the scalability features needed while meeting budget guidelines.
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