Marking Management Service generated by router itself problem

[ctranminh]

Hi forum,

I am working on a QoS project. I want to mark some kinds of traffic generated by router itself such as ICMP, syslog, Netflow and SNMP . I intend to mark them as Management Services and as DSCP af32 then put af32 and af31, which I already marked by HTTP services on a Queue. The problem is that when I mark Management Service in an Output Policy-map, the HTTP service also remarked as af32 too. I don't know how to mark those Management services without remark HTTP service, then put 2 markers in same output queue???

I have some commands here to help you understand my problem.

class-map HTTP

match protocol http

class-map Ouput_queue

match dscp af31

match protocol icmp

match protocol syslog

match protocol snmp

!

Policy-map Mark_http

class HTTP

set dscp af31

!

Policy-map output_Queue

class Ouput_queue

set dscp af32 ---> Also remark HTTP traffic

bandwidth 256

Plz help me

[ctranminh]

No one help me???

If you don't understand problem, plz let me know.. I will talk more

[cadet alain]

Hi,

Maybe this could work:

class-map Ouput_queue

  match not class-map HTTP

match dscp af31

match protocol icmp

match protocol syslog

match protocol snmp

This way HTTP which has dscp AF31 won't be set DSCP 32 but it will be classified as class-default traffic, is this what you wish? 

Regards.

Alain

Don't forget to rate helpful posts.

[ctranminh]

Thanks to cadet alain,

But that 's not what I want. Maybe I should forget this trouble. I must weigh whether marking or queueing those traffics. And in my situation, I think Marking is more important. When marked, the rest of routers will give them a right queue later. Only in one section of network, traffics generated by a router classified in class-default, however those in the other sections will be classified in right class. Therefore, the purpose of QoS is still  acceptable.

Here is my policy-map in Routers

LAN1------(RouterA)-------(RouterB)-------(RouterC)----LAN2

class match-any MANAGEMENT_SERVICE

   match protocol icmp

   match protocol syslog

   match protocol snmp

class-map match-any BUSINESS_TRAFFIC

   match ip dscp af31

   match ip dscp af32

policy-map OUTPUT_POLICY

  class BUSINESS_TRAFFIC

    bandwidth 1024

    random-detect dscp-based

  class MANAGEMENT_SERVICE

    set dscp af32