[cisco-voip] QoS ?

[Robin Inderberg]

A question regarding the text written in this post.

 

The statement match-any on a 2950T, I guess it isn't possible to use, right? 

c2950-i6q4l2-mz.121-22.EA1b.bin I use this image.. 

 

 

Med vänliga hälsningar

 

Robin Inderberg

robin.inderberg at candidator.se <mailto:robin.inderberg at candidator.se> 

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From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Jonathan Charles
Sent: den 20 mars 2006 20:33
To: Wydra, Jason
Cc: Voll, Scott; Cisco Voip; Bell, Joe
Subject: Re: [cisco-voip] QoS ?

 

I was misreading it...

But I still stand by statement that CoS is layer 2... and Precedence, aka ToS is layer 3...

You are right, CS3 and Precedence 3 are the same thing... just different ways of saying it.


Jonathan



On 3/20/06, Wydra, Jason <jwydra at burwood.com> wrote:

CS3 isn't CoS dude.

 

Jason Wydra

Consultant 

burwood group, inc.

Phone: (312) 327-4677 

Cell: (312) 493-2834 

jwydra at burwood.com 

 

 

________________________________

From: Jonathan Charles [mailto:jonvoip at gmail.com] 
Sent: Monday, March 20, 2006 1:26 PM
To: Wydra, Jason
Cc: Bell, Joe; Voll, Scott; Cisco Voip


Subject: Re: [cisco-voip] QoS ?

 

No.

CoS is layer 2, Precedence is layer 3...


Jonathan

On 3/20/06, Wydra, Jason <jwydra at burwood.com > wrote:

You want a quick 101 on QoS and DSCP you might want to check out this link........

 

http://www.cisco.com/en/US/tech/tk543/tk757/technologies_tech_note09186a00800949f2.shtml

 

Also, with the following class map, wouldn't the CS3 and precedence 3 statements be redundant? Couldn't you just get by with one of them? Since both effectively are 011000

 

class-map match-any VoIP-ctrl

 match ip dscp cs3

 match ip dscp af31

 match ip precedence 3

 

 

Jason Wydra

Consultant

burwood group, inc. 

 

 

________________________________

From: cisco-voip-bounces at puck.nether.net [mailto: cisco-voip-bounces at puck.nether.net <mailto:cisco-voip-bounces at puck.nether.net> ] On Behalf Of Bell, Joe
Sent: Monday, March 20, 2006 12:49 PM
To: Voll, Scott; Cisco Voip


Subject: Re: [cisco-voip] QoS ?

 

You want to use match-any.  Match-all means the packet must match all criteria defined in your map or it does not match.  Match-any is any single description in your maps.  Currently, your signaling map does not match any of the traffic you're trying to classify due to this behavior.  AF31 is bit structure 011010 and CS3 is 011000.  There won't be a packet that matches both.  You want it to be an "either" statement, not an "and" so use match-any.  Also, if you use match-any, you can collapse your class-maps for signaling into one map rather than two, which is cleaner.  Here is a collapsed map that works.

 

class-map match-any VoIP-ctrl

 match ip dscp cs3

 match ip dscp af31

 match ip precedence 3

class-map match-any VoIP

 match ip dscp ef

 match ip precedence 5

.

 

Joe Bell 

 

 

 

 

 

________________________________

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Voll, Scott
Sent: Monday, March 20, 2006 10:20 AM
To: Cisco Voip
Subject: [cisco-voip] QoS ?

 

I have yet to take the QoS class so can someone give some advice:

 

I just these class maps:

 

class-map match-all WAN2LAN-VoIP-ctrl

 match ip dscp af31

 match ip dscp cs3

class-map match-all VoIP-ctrl

 match ip dscp cs3

 match ip dscp af31

 match ip precedence 3

class-map match-all VoIP

 match ip dscp ef

 match ip precedence 5

class-map match-all WAN2LAN-VoIP

 match ip dscp ef

 

is this correct or should I be using match-any.

 

Thanks in advance

 

Scott

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