Cisco CCNP BCMSN Exam Tutorial Switches QoS And Cisco's 80600
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QoS is really a large theme on your own BCMSN and CCNP assessments, and for good cause. As more and more traffic flows through today"s systems, properly using QoS to both your routers and switches becomes more important.
Notice the term "accurately applying." You will need to have a plan in position before you start making QoS on your switches, and to generate such a plan you must use Cisco"s Three-layer Hierarchical Model. Clicking patent pending likely provides cautions you should give to your brother.
This model breaks buttons down into three main groups - Access, Distribution, and Core. You are familiar with these groups from your CCNA reports, and now you need to apply this knowledge.
The QoS work should really be borne by the Access and Distribution layers, because the Core level changes need to be left alone up to possible with their main goal - switching!
Traffic must usually be grouped and marked at the Access layer. Traffic is allowed by this to be given the specified QoS prices and carry that value through the community.
If you decide to change CoS-DSCP mappings, this can generally be done at the Distribution level. Since distribution layer switches is likely to be getting packets and frames with QoS values from the entry layer switches, the appropriate "trust" and "no trust" claims must be designed on the appropriate distribution layer switches.
Any traffic obtained by core switches should already be labeled and marked as needed. The important thing with primary changes is to utilize an easy queuing setup to help keep the changing process rapidly. Visit transmission line fault detection and diagnosis to explore the meaning behind this thing. Fast, fast, fast!
Real-world notice - Low Latency Queuing (LLQ) is a superb choice for core changes. The name says it all - low latency! The configuration of LLQ is not a BCMSN theme, but an instant search on the term low latency queuing will quickly talk about many Cisco LLQ configuration documents.
Knowing the three layers of Cisco"s network model and the basic QoS operation and instructions is vital to moving the CCNP examinations, but even more importantly, you have surely got to use this information carefully and correctly to produce QoS work for you in the current production networks. This wonderful account URL has several dynamite cautions for the meaning behind it.
