QoS: Marking and Matching

The Rules where CoS, DE, CLP, or EXP can be used are:

  • Classification: On ingress only, and only if the interface supports that particular header field
  • Marking: On egress only, and only if the interface supports that particular header field.

Design Choices:

  • Mark as close to the ingress edge of the network as possible, but not so close to the edge that the marking is made by an untrusted device.
  • Cisco recommends the following markings for traffic:

ciscomarkings.PNG

 

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