Choose the Interesting Traffic

Choose the Interesting Traffic

Router(config-cmap)# match access-group name LETWEBIN	Selects traffic by access control list (ACL) name or number.
Router(config-cmap)# match cos 1 2 3	Selects traffic by one or more Layer 2 class of service (CoS) value(s).
Router(config-cmap)# match source-address mac 00:00:00:00:00:00	Selects traffic by source MAC address.
Router(config-cmap)# match destination-address mac 00:00:00:00:00:00	Selects traffic by destination Media Access Control (MAC) address.
Router(config-cmap)# match discard-class 2	Selects traffic marked by the set discard-class value command.
Router(config-cmap)# match dscp 1 2 af11	Selects traffic by one or more differentiated services code point (DSCP) value(s).
Router(config-cmap)# match fr-de	Selects traffic by a set discard eligible bit.
Router(config-cmap)# match fr-dlci 416	Selects traffic by Frame Relay data-link connection identifier (DLCI) number.
Router(config-cmap)# match input-interface serial0/0/0	Selects traffic by input interface name.
Router(config-cmap)# match vlan 55-59 82	Selects traffic in a single VLAN, a range of VLANs, or both.
Router(config-cmap)# match qos-group 3	Selects traffic marked by the set qos-group value command.
	NOTE: Use NBAR for classification by using the match protocol protocol-name command.
Router(config-cmap)# match protocol bgp	Selects traffic by NBAR protocol discovery.
Router(config-cmap)# match class-map CLASSMAPNAME	Selects traffic by nesting a class-map in a class-map.
	NOTE: Traffic classes can be nested within one another, saving users the overhead of re-creating a new traffic class when most of the information exists in a previously configured traffic class. In the previous example, traffic class CLASSMAPNAME could have the same characteristics of another class-map with the exception of a single line. Rather than reconfigure the class-map line for line, you can nest one class-map inside another class-map.
Router(config-cmap)# exit	Exit class-map configuration mode.

The tasks to mark traffic are

STEP 3.	Create a policy.
STEP 4.	Choose the class of traffic.
STEP 5.	Mark the traffic in the class.
STEP 6.	Apply the policy to an interface.

Step 3: Create a Policy

Router(config)# policy-map MARKINGPOLICY	Creates the marking policy MARKINGPOLICY.

Step 4: Choose the Class of Traffic

Router(config-pmap)# class MAPNAME	Chooses the class to use in this policy.

Step 5: Mark the Traffic in the Class

Router(config-pmap-c)# set dscp af41	Sets the DSCP of the traffic class MAPNAME to "af41".
Router(config-pmap-c)# exit	Exits out of config-pmac-c mode and returns to config-pmap mode.

Note

Repeat steps 4 and 5 until all required classes are defined.

Step 4 (repeated): Choose the Class of Traffic

Router(config-pmap)# class CLASSMAPNAME	Add another class of traffic to policy MARKINGPOLICY.

Step 5 (repeated): Mark the Traffic in the Class

Router(config-pmap)# set cos 3	Marks the packets in class MYMAPCLASS with a CoS value of 3.
Router(config-pmap-c)# set precedence 5	Marks the packets in class MYMAPCLASS with a precedence value of 5.
Router(config-pmap-c)# set qos-group 4	Sets a group identifier that is used to classify packets.
Router(config-pmap-c)# exit	Finishes defining the policy for class MYMAPNAME.

Step 6: Apply the Policy to an Interface

Router(config)# interface serial 0/0/0	Chooses which interface to set the marking policy.
Router(config-if)# service-policy output MARKINGPOLICY	Applies the marking policy to outbound traffic.