Default class in QOS

[ciscoroyzhang]

Hi all

I am new to QOS,  need a help on how to setup default class.

in following example, I know that trafic with dscp 0 will be placed in fair-queue, but what about packet with other DSCP value apart from CS3/EF. is there any command to reset all other packets to default value.

)# class-map match-any    VOIP-RTP

)# match dscp ef

)# class-map match-any    VOIP-CONTROL

)# match dscp cs3

)# policy-map          VOIP-QOS-POLICY-OUT

)# class VOIP-RTP

)# priority bandwidth 90                                  

)# class VOIP-CONTROL

)# bandwidth 30

)# class class-default

)# fair-queue

)# int s0/2/0:0

)# service-policy output VOIP-QOS-POLICY-OUT

Thanks.

Roy

[ciscoroyzhang]

find answer:   Each class is evaluated in the order they were put into the policy-map and the last class in the policy-map is always the class-default. The class-default is in every policy-map by default and it cannot be removed. The class-default has a classification policy that matches all traffic that has not been identified by any other class in the policy   

details:

http://www.networkworld.com/community/node/38627

[Chris Deren]

Correct, basically all other markings will be stripped and traffic will go into default queue with DSCP 0.

HTH,

Chris