In this part, you are likely to be reintroduced into a media version you saw on your CCNA studies. No, it is not the TCP/IP version or the OSI version – . Let us face it, almost everything you needed to do to your CCNA was incorporate the sequence and the 3 layers they had been found in that version, but the stakes have been raised here on your CCNP studies. You have to understand what each coating shouldn’t be doing, and what each layer does. This is critical information to your community profession also, so let us begin with a overview of this Cisco three-layer version, and we’ll have a peek at the tasks of every layer. We will discuss them, although The majority of the factors at every layer are common sense!
Now we will have a peek at the center layer of the Cisco version.
The expression core switches describes some switches located here. Switches in the layer enable switches to convey, and this can be more than the usual occupation. It is crucial to maintain any workload off the switches, and permit them to do exactly what they have to perform – change! The center layer is the backbone of your network, therefore we’re low latency and considering high-speed data move – that is it!
Core layer buttons are often the most effective on your system, capable of greater throughput than any other buttons in the system. What we do on switch or a Cisco router comes with a price in memory or CPU, so we’re likely to leave filtering and manipulation into additional layers. The exclusion is Quality of Service, or Cisco QoS. QoS is performed in the center layer. We are going to go into more detail about QoS in a different tutorial, but for now, understand that QoS is queuing where attention could be given to information in queues that are some specific. (You will soon discover this is a really fundamental definition!)
We constantly desire redundancy, but you would like a good deal of redundancy on your center layer. That is the nerve center of your network, therefore as possible get it, fault tolerance has to be as large. Root bridges must be found at the center layer.
The significance of maintaining unnecessary workload off your heart switches can’t be overstated. We’ll have a peek at this Cisco model’s layers do that.
Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of over 100 free certification examination tutorials, such as Cisco CCNA certification test prep posts. Cisco CCNA coaching and his Cisco CCNA study guide is offered!