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Using QoS DSCP Marking – Zoom Support
https://support.zoom.us/hc/en-us/articles/207368756-Using-QoS-DSCP-Marking#:~:text=This%20can%20be%20used%20to%20determine%20which%20network,40%20for%20video%2C%20and%2040%20for%20screen%20sharing.
DSCP and Precedence Values - Cisco
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000/sw/4_0/qos/configuration/guide/nexus1000v_qos/qos_6dscp_val.pdf
000 000 0 Default 101 110 46 EF Table 6-1 Commonly Used DSCP Values (continued) DSCP Value Decimal Value Meaning Drop Probability Equivalent IP Precedence Value Table 6-2 Precedence Values Value Description 000 (0) Routine or Best Effort 001 (1) Priority 010 (2) Immediate 011 (3) Flash - mainly used for Voice Signaling or for Video. 100 (4) Flash Override
Using QoS DSCP Marking – Zoom Support
https://support.zoom.us/hc/en-us/articles/207368756-Using-QoS-DSCP-Marking
The default Zoom DSCP marking values are 56 for audio, 40 for video, and 40 for screen sharing. You can update audio and video values to allow a network administrator to adjust the priority for Zoom traffic on their network. If your organization deploys Zoom through an MSI installation, the MSI must be re-deployed after configuring the DSCP markings.
Configuring port ranges and a Quality of Service policy ...
https://docs.microsoft.com/en-us/skypeforbusiness/manage/network-management/qos/configuring-port-ranges-for-your-skype-clients
Set the DSCP value to 34 instead of 46. (As noted previously, you do not have to use the DSCP value 34; you simply must assign a different DSCP value than the one used for audio.) Use the previously configured port range for video traffic. For example, if you have reserved ports 58000 through 58019 for video, set the port range to this: 58000:58019.
Configuring port ranges and a Quality of Service policy ...
https://docs.microsoft.com/en-us/SkypeForBusiness/manage/network-management/qos/configuring-port-ranges-for-your-conferencing-application-and-mediation-servers
The DSCP value of 46 is somewhat arbitrary: although DSCP 46 is often used for marking audio packets, you do not have to use DSCP 46 for audio communications. If you have already implemented QoS and you are using a different DSCP code for audio (for example, DSCP 40), you should configure your Quality of Service policy to use that same code (i ...
Type of Service (ToS) and DSCP Values - LinuxReviews
https://linuxreviews.org/Type_of_Service_(ToS)_and_DSCP_Values
Audio and Video calls...QoS - Cisco Community
https://community.cisco.com/t5/ip-telephony-and-phones/audio-and-video-calls-qos/td-p/2379292
I know that the QoS DSCP value for Audio calls is "EF" and our QoS configuration is setting up for Audio calls. Now we like to activate Video as well and I know that the DSCP value is AF41. When we make a video call, audio is "integrated" and the DSCP is set to AF41. 1.
Configuring QoS for Lync IP Phones : Jeff Schertz's Blog
http://blog.schertz.name/2014/10/configuring-qos-for-lync-ip-phones/
As was pointed out in that article Microsoft has set the default DSCP value as 40 which is not commonly used for audio traffic in most networks. Since the Expedited Forwarding classification of 46 is used for audio throughout this article then this value needs to be updated to configure LPE devices accordingly.
Solved: QoS - Why DSCP AF-41 for Video - Cisco Community
https://community.cisco.com/t5/collaboration-applications/qos-why-dscp-af-41-for-video/td-p/2241293
It requires no packet loss and latency of about 150 ms. So it’s a general guideline\standard from Cisco to mark voice with a dscp 46 or ef, Interactive video 34 or af41, Streaming video as dscp 32 or cs4. Since this is Cisco recommended best practise, Cisco's most UC apps by default mark the traffic like this.
IP Precedence and DSCP Values - NetworkLessons.com
https://networklessons.com/quality-of-service/ip-precedence-dscp-values
Default PHB. The default PHB means that we have a packet that is marked with a DSCP value of 000000. This packet should be treated as “best effort”. Class-Selector PHB. There was a time when some older network devices would only support IP precedence and newer network devices would use differentiated services.
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