Qos Voice/Citrix

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Aug 31st, 2009
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I am trying to configure Qos on our MPLS for citrix. We already have qos running for Voice and it seems to work well. No voice issues reported. Each branch has a full T1 out to the cloud. The vendor Verizon has a GOLD CAR of 512k setup for Voice which we route our Voice traffic over. I would like to tag my citrix traffic as COS=3 mission critical. I have attached out current QOS configuration. Is this ok to do the tagging this way is there a better? Also I have started to add the Citrix tag in there. any help on completing would be greatly appreciated.

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Joseph W. Doherty Mon, 08/31/2009 - 16:03
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You might want to double check exactly what you are getting from Verizon. My experience with their MPLS service, you need to buy real-time bandwidth separately, and other traffic falls into a 5 class model which allocates fixed bandwidth reservations, two drop points on some classes, and uses DSCP markings, not CoS markings.


Also, on non-real-time classes, exceeding the purchased CAR often isn't an issue.


PS:

BTW, your limiting your overall data rate to 512 Kbps.

wbarren Mon, 08/31/2009 - 17:53
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We have already bought the real-time bandwidth from Verizon that is the 512k gold car. Thanks for pointing out the 512k restriction I was putting on the data. I have made some changes which appear to correct that.



Attachment: 
Joseph W. Doherty Tue, 09/01/2009 - 03:37
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Not really what you want, I think.


Perhaps something similar to:


(NB: syntax might be incorrect or not supported on your IOS version. You also need to check markings supported by MPLS provider.)


class-map match-any VoIP-Cntrl

match ip dscp af31

match ip dscp cs3


class-map match-all VoIP-RTP

match ip dscp ef


class-map match-all Citrix

!NB: you might want to subclassify Citrix to avoid giving preference to disk-to-disk or printing traffic

match protocol citrix


policy-map sub_int


class VoIP-Cntrl

priority percent 33

!NB: reason for policer, LLQ policer doesn't engage unless there's interface congestion provider, though, likely polices rate

police percent 33

set ip dscp EF


class VoIP-RTP

bandwidth percent 5

set ip dscp cs2


class-map Citrix

bandwidth percent 10

set ip dscp cs3


class class-default

!NB: deactivate FQ to maintain explict other class's bandwidth regardless of number of class-default flows

bandwidth percent 10

set ip dscp BE


interface Serial#/#/# point-to-point

description MPLS Circuit

service-policy output sub_int

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