Question

Airtime fairness - explaination of different fairness policies


Userlevel 4
What is the difference between the 5 fairness policies selectable under "VNS -> Wireless QoS -> Flexible Client Access"? In the user guide in could not find any informations what the different values mean/how the fairness algorithmens are implemented.

Regards
Hartmut

5 replies

Userlevel 7
Hi Hartmut,

here the explanation from the knowledge transfer slides of v7.0 regarding FCA.....

FCA adjustable in 5 levels between:
–Packet Fairness = same as V6R1 but fixes aggregation/non-aggregation ratio
–Airtime Fairness = each client gets a equal share of the airtime

•Intermediate levels will produce result on a geometrical scale
–If the throughput for a client with Airtime Fairness is 16 times larger than with Packet Fairness,
then the intermediate levels will produce approximately 2, 4 and 8 times the throughput.

Ron
Userlevel 4
Ron wrote:

Hi Hartmut,

here the explanation from the knowledge transfer slides of v7.0 regarding FCA.....

FCA adjustable in 5 levels between:
–Packet Fairness = same as V6R1 but fixes aggregation/non-aggregation ratio
–Airtime Fairness = each client gets a equal share of the airtime

•Intermediate levels will produce result on a geometrical scale
–If the throughput for a client with Airtime Fairness is 16 times larger than with Packet Fairness,
then the intermediate levels will produce approximately 2, 4 and 8 times the throughput.

Ron

Thanks Ron,

this was the information I was looking for. Didn't remember that the explanation could be part of the knowledge transfer slides.
Userlevel 4
Ron wrote:

Hi Hartmut,

here the explanation from the knowledge transfer slides of v7.0 regarding FCA.....

FCA adjustable in 5 levels between:
–Packet Fairness = same as V6R1 but fixes aggregation/non-aggregation ratio
–Airtime Fairness = each client gets a equal share of the airtime

•Intermediate levels will produce result on a geometrical scale
–If the throughput for a client with Airtime Fairness is 16 times larger than with Packet Fairness,
then the intermediate levels will produce approximately 2, 4 and 8 times the throughput.

Ron

Hello Ron, please could you provide the slides? In the extranet the oldest knowledge transfer I found is 7.41.

Or at Extreme Support: please make old knowledge transfers available for partners again, thanks.
Userlevel 7
As the slides are marked as "Confidential and Proprietary" I don't know whether I'm allowed to post it in the public forum.

So I hope someone from Extreme look into the post and provide the slides or an official statement.
Userlevel 4
Ron wrote:

As the slides are marked as "Confidential and Proprietary" I don't know whether I'm allowed to post it in the public forum.

So I hope someone from Extreme look into the post and provide the slides or an official statement.

Thanks, Ron agein. I will look for this slides in the extranet portal. I 've contacted an Extreme employee to provide me official access to required documents.

Best Regards
Hartmut

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