Setting QoS on ASA 5510 for "Skype for business" (old Lync)

[wojciech.iwanski]

Hello all,

I'm trying to set QoS for Skype for business audio and video calls in ASA 5510.
I've created priority queue on interface facing internet with settings:

• Queue Limit 2048
• Transmission Ring Limit 512

And I proceeded to create Service Policy Rule on the same interface with settings:

• Match DSCP (based on http://blog.kloud.com.au/2012/10/31/quality-of-service-qos-for-lync-2010-and-lync-2013/ )
• AF41, CS3, EF
• Nothing in protocol inspection
• No changes in connection settings, netflow, user statistics
• Next in QoS I set enable priority filter

And it doesn't seem to do anything.
Have I missed something?

[Mohammed al Baqari]

Do a packet capture on ASA exit interface to see the IP Header and check if DSCP being marked.

Also, how is the ASA connected to the nexthop. Is it through a switch. Perhaps you need to enable trust on the switch.

[wojciech.iwanski]

ASA is connected to router provided by Internet supplier.

I did packet capture thou I'm not sure how can I check from this (see picture attached) for DSCP mark in header.

Audio / video traffic is not marked with DSCP by default?