MR QOS

dmiss
Here to help

MR QOS

Hi there--

 

Can anyone provide some examples of some recommended QOS rules prioritizing Video Conferencing (Teams, Zoom, etc)? We're running into issues where our Virtual Teacher's (that teach from school) students telling them that they are freezing and cutting in/out during our peak usage time (12-230p), so thought some QOS on the MRs may help. 

14 REPLIES 14
DarrenOC
Kind of a big deal
Kind of a big deal

Hi @dmiss 

 

Some bedtime reading:

 

https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoS-SRND-Book/QoSInt...

 

https://documentation.meraki.com/MR/WiFi_Basics_and_Best_Practices/Wireless_QoS_and_Fast_Lane

 

But in summary:

 

  • Interactive Video traffic should be marked to DSCP AF41; excess Interactive-Video traffic can be marked down by a policer to AF42 or AF43.

 

 

Darren OConnor | doconnor@resalire.co.uk
https://www.linkedin.com/in/darrenoconnor/

I'm not an employee of Cisco/Meraki. My posts are based on Meraki best practice and what has worked for me in the field.

Do you know of any reason not to use AF46 for priority video?

Bruce
Kind of a big deal

You can mark traffic however you like, and create whatever QoS scheme you like within your organisation. You then assign the markings you choose to the queues you want. Most people stick to one of the well-known schemes so that it’s easier for someone else to follow.

 

Specifically with marking video as AF46, assuming you mean DSCP 46 or EF, then my concern would be that if your also running voice as EF then you may impact the voice quality. Voice works best with low jitter, introducing video packets into the queue may increase jitter since unlike voice, video is not a smooth consistent bandwidth, it varies a lot. The other consideration is that depending on how much of your smaller links video is using you may reduce the overall effectiveness of QoS. If you prioritise too much traffic then you might as well prioritise none - the guide used to be to give the highest priority to no more than about 30% of link bandwidth (with modern bandwidths this is usually not a problem).

Thank you for the response. This is a situation where we are not using audio and we have no need at this time to prioritize other traffic.

I appreciate the insights, too. Should we need to prioritize more in the future, your guidelines will be very helpful.

DarrenOC
Kind of a big deal
Kind of a big deal

Microsoft’s solution appears to be “buy fatter pipes”!

 

https://docs.microsoft.com/en-us/microsoftteams/qos-in-teams

Darren OConnor | doconnor@resalire.co.uk
https://www.linkedin.com/in/darrenoconnor/

I'm not an employee of Cisco/Meraki. My posts are based on Meraki best practice and what has worked for me in the field.
DarrenOC
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Kind of a big deal

Zoom!! Don’t use it, refuse to use it. Delete it!

Darren OConnor | doconnor@resalire.co.uk
https://www.linkedin.com/in/darrenoconnor/

I'm not an employee of Cisco/Meraki. My posts are based on Meraki best practice and what has worked for me in the field.
DarrenOC
Kind of a big deal
Kind of a big deal

One final note...QoS has to be end to end...!  What’s upstream of the MR and can you prioritise the video traffic all the way till it hits the wire?  Then obviously once you’re out onto the internet we’ll that’s just the Wild West!

Darren OConnor | doconnor@resalire.co.uk
https://www.linkedin.com/in/darrenoconnor/

I'm not an employee of Cisco/Meraki. My posts are based on Meraki best practice and what has worked for me in the field.

HAH! We don't.. exclusively MS Teams. 

DarrenOC
Kind of a big deal
Kind of a big deal

👍🏻

Darren OConnor | doconnor@resalire.co.uk
https://www.linkedin.com/in/darrenoconnor/

I'm not an employee of Cisco/Meraki. My posts are based on Meraki best practice and what has worked for me in the field.
PhilipDAth
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Kind of a big deal

Also note that Microsoft Teams doesn't QoS mark its traffic by default.  You have to enable that in the Office 365 portal.

 

Also note the traffic goes from your school into the Microsoft cloud and then from the Microsoft cloud to your students homes.

The only part you can impact is from your school to your Internet edge.  If you have no students at school then your school Internet usage is probably way down - so there is a good chance that nothing you do will make any impact.

 

If you monitor the uplink on your MX during this peak time - are you actually running out of bandwidth?  if the answer is "no" then there is probably nothing you can.  QoS only has an impact when their is congestion.


@PhilipDAth wrote:

Also note that Microsoft Teams doesn't QoS mark its traffic by default.  You have to enable that in the Office 365 portal.

 

Also note the traffic goes from your school into the Microsoft cloud and then from the Microsoft cloud to your students homes.

The only part you can impact is from your school to your Internet edge.  If you have no students at school then your school Internet usage is probably way down - so there is a good chance that nothing you do will make any impact.

 

If you monitor the uplink on your MX during this peak time - are you actually running out of bandwidth?  if the answer is "no" then there is probably nothing you can.  QoS only has an impact when their is congestion.


Where is that in the Office 365 Portal? I'm searching around for it.

>Where is that in the Office 365 Portal? I'm searching around for it

 

https://admin.teams.microsoft.com/ 

 


@PhilipDAth wrote:

>Where is that in the Office 365 Portal? I'm searching around for it

 

https://admin.teams.microsoft.com/ 


Thanks, yep I found it there under Meetings > Meeting Settings > Network.

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