Cisco CCNP Certification / BCMSN Exam Tutorial: Writing QoS Policy
QoS – Quality of Service – is a huge topic on both the BCMSN exam and real-world networks. QoS is so big today that Cisco’s created separate specialist certifications that cover nothing but QoS! It can be an overwhelming topic at first, but master the fundamentals and you’re on your way to exam and job success.
If you work with QoS at any level – and sooner or later, you will – you’ve got to know how to write and apply QoS policies.
Creating and applying such a policy is a three-step process.
1.Create a QoS class to identify the traffic that will be affected by the policy.
2.Create a QoS policy containing the actions to be taken by traffic identified by the class.
3.Apply the policy to the appropriate interfaces.
If the phrase “identify the traffic” sounds like it’s time to write an access-list, you’re right! Writing an ACL is one of two ways to classify traffic, and is the more common of the two. Before we get to the less-common method, let’s take a look at how to use an ACL to classify...