Wireless Access

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Occasional Contributor II
Posts: 81
Registered: ‎01-16-2016

Phy rate vs Throughput

Hi,

How are the phy rate of the link calculated ? .What is the relaiabilty of phy rate or instead do we need to run a throughput test ? .

If  phy rate shows of an ac adpter shows 870 Mb , Does it mean it support 2 by 2 spatial streams 

Thanks

Aruba Employee
Posts: 159
Registered: ‎02-14-2013

Re: Phy rate vs Throughput

Hi, 

 

The PHY rates are based on the MCS supported. See http://mcsindex.com/ for the complete MCS and the rates. 

 

Thanks, 

Rajaguru Vincent 

Thanks,
Rajaguru Vincent
CWNA | CWSP | CWAP | CWDP | ACMP
Occasional Contributor II
Posts: 81
Registered: ‎01-16-2016

Re: Phy rate vs Throughput

Hi,

If the mcsindex shows 10.5 , is it a valid index ?

Thanks

MVP
Posts: 992
Registered: ‎04-13-2009

Re: Phy rate vs Throughput

Hi,

 

As per the mcsindex.com site a valid MCS index will be a whole number. 10.5 is not a valid MSC index value.

 

Maybe you can post a screenshot of where you're setting this value?

 

Cheers

James

Cheers
James

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Guru Elite
Posts: 21,269
Registered: ‎03-29-2007

Re: Phy rate vs Throughput

The phy rate is based on the negotiated supported characteristics of a connection. They can vary based on sender/receiver capability., interference, contention or even distance. In the lab in perfect circumstances, this would represent the negotiated capabilities of the receiver and the sender. In the real world, contention, distance and interference drive this number down. Throughput is typically no more than half of the negotiated phy rate due to the half duplex nature of wireless.


Colin Joseph
Aruba Customer Engineering

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