Marking Action Drivers - Cisco Catalyst 4500 series Administration Manual

Chapter 42 Configuring Quality of Service
The following table lists the traffic attributes for which a to-from relationship can be established using
the table map.
Table 42-3
The "To" Attribute
Precedence
DSCP
CoS
The following is an example of a policy map (policy2) configured to use the table map (table-map1)
created earlier:
Policy map policy
exit
In this example, a mapping relationship was created between the CoS attribute and the DSCP attribute
as defined in the table map.
For information on configuring a policy map to use a table map, "Configuring a Policy Map" section on
page 42-50.
The final task is to attach the policy map to the interface. For information on attaching the policy map
to the interface, see the "Attaching a Policy Map to an Interface" section on page 42-51.

Marking Action Drivers

A marking action can be triggered based on one of the two QoS processing steps.
Traffic Marking Procedure Flowchart
Figure 42-5 illustrates the order of the procedures for configuring traffic marking.
OL_28731-01
Traffic Attributes for Which a To-From Relationship Can Be Established
The "From" Attribute
CoS, DSCP, Precedence
COS, DSCP, Precedence
DSCP, CoS, Precedence
class class-default
set cos dscp table table-map
Classification based: In this case, all the traffic matching a class is marked using either explicit or
tablemap based method. This method is referred to as unconditional marking.
Policer result-based: In this case, a class of traffic is marked differently based on the policer result
(conform/exceed/violate) applicable to that packet. This method is referred to as conditional
marking.
Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)E
Configuring VSS QoS
42-21