Re : Class-map Question.

InternetB · ‎06-21-2009

Hi,

I would like to check if there is a class-map statement as follows:-

class-map match-all Data

match ip dscp cs1 af11

My question is that would the class-map be effective when both cs1 and af11 present or is it an OR operations ?

Thank you,

Cheers,

InternetB.

kishan1984 · ‎06-21-2009

yes it is an OR operations

Istvan_Rabai · ‎06-21-2009

Hi InternetB,

The following would be an AND operation:

class-map match-all Data

match ip dscp cs1

match ip dscp af11

But this would not match any packets as one packet cannot have 2 different DSCP values at a time, of course.

Cheers:

Istvan

InternetB · ‎06-21-2009

Thanks Istvan.

Yeah, then the class-map should be a 'class-map match-any'.

Cheers,

InternetB.

Joseph W. Doherty · ‎06-22-2009

"My question is that would the class-map be effective when both cs1 and af11 present or is it an OR operations ? "

Yes, it can be effective assuming you mean you want to match a packet with either a CS1 or AF11. (One packet can't have both, since each is a unique DSCP tag. I'm also assuming you're not confusing CS1 with IP Precedence 1.)

These class-maps are equivalent:

class-map match-all Data

match ip dscp cs1 af11

class-map match-any Data

match ip dscp cs1

match ip dscp af11