class-map question match-any vs match-all

[brian.holmes]

Are the following class-maps equivalent since there is only one match statement in them?  or does the any/all apply to "af41 and/or cs4"

class-map type qos match-any VIDEO

     match dscp af41 cs4

class-map type qos match-all VIDEO

     match dscp af41 cs4

Brian Holmes
Verizon Enterprise for Chrysler       

[Hermanus Janse van Vuuren]

No, in the match any if can only match either of the 2 and it wil be put in that traffic class, on the any statement i needs to match both values. That is what I understand from the explanation below.

Creating a Traffic Class

To create a traffic class, use the class-map command. The syntax of the class-map command is as follows:

class-map [match-any | match-all] class-name
no class-map [match-any | match-all] class-name

The match-all and match-any Keywords

The match-all and match-any keywords need to be specified only if more than one match criterion is configured in the traffic class.

The match-all keyword is used when all of the match criteria in the traffic class must be met in order for a packet to be placed in the specified traffic class.

The match-any keyword is used when only one of the match criterion in the traffic class must be met in order for a packet to be placed in the specified traffic class.

If neither the match-all nor match-any keyword is specified, the traffic class will behave in a manner consistent with match-all keyword.

About The match not Command

The match not command, rather than identifying the  specific match parameter to use as a match criterion, is used to specify  a match criterion that prevents a packet from being classified as a  member of the class. For instance, if the match not qos-group 6 command  is issued while you configure the traffic class, QoS group 6 becomes  the only QoS group value that is not considered a successful match  criterion. All other QoS group values would be successful match  criteria.

[brian.holmes]

But since there is only one match statement in this case, wouldn't match-any be equivelent to match-all?

on the other had, if the class map looked like this I understand how match-any would be differant than match-all

class-map type qos match-all VIDEO

     match dscp af41

     match dscp cs4

i.e.

In this case I would expect no packets to ever match since a packet could never have dscp af41 AND dscp cs4

But with the original class-map

class-map type qos match-all VIDEO

     match dscp af41 cs4

Can I assume an OR is applied between "af41 cs4" since it is a single match statement?

Brian Holmes
Verizon Enterprise for Chrysler

[Nadeem Ahmed]

The match-any or match-all will change from OR to AND for multiple lines.

Match all its acts as a "AND" operation. Where match any does a "OR" operation . if there is only one it does not matter at all, however if there are more than one then you match all of them.

let says you have

class-map type qos match-all VIDEO

     match dscp af41

     match dscp cs4

So when packets arrives, it will matches AF41 and CS4.

class-map type qos match-any VIDEO

     match dscp af41

     match dscp cs4

"Match-any" is OR logic between each line in the class-map.  If any of those entries hold true, so if it has af41 or cs4 the class map will have match

Br,
Nadeem 

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