NBAR2 and Skype for Business Application/Desktop Sharing

[pinglis]

Which application does NBAR2 classify Skype for Business Application/Desktop Sharing as?
Microsoft recommend to classify this traffic as CS3 (DSCP 24) and I want to verify how I can maintain this if classifying using NBAR2.

Thanks

[Giuseppe Larosa]

Hello Pinglis,

NBAR2 is a classification engine and does not provide automatic marking

You need to configure a class-map like

class-map SKYPE

match protocol skype

Later in the policy-map that performs marking

policy-map MARK-TRAFFIC

class SKYPE

set dscp cs3

Note: it is very important the order of invoking the classes in the policy for correct behaviour.

on input interface you will have

interface gi0/0

service-policy MARK-TRAFFIC input

Hope to help

Giuseppe

[pinglis]

Thanks for the reply. I understand I need a Class Maps to classify and mark the traffic. I am looking at classifying traffic based on traffic-class and business-relevance, e.g:

class-map match-all MULTIMEDIA-CONFERENCING
 match protocol attribute traffic-class multimedia-conferencing
 match protocol attribute business-relevance business-relevant

What I need to know is how NBAR is classifying Skype for Business Application/Desktop Sharing. For Audio and Video is is clear (ms-lync-audio and ms-lync-video) but not for Application/Desktop Sharing.

The descriptions in the protocol pack release notes are just an unhelpful one line Microsoft sales pitch