MCS Values

terrywatson651 — Mon, 05 Jul 2021 14:01:50 GMT

I carried out some iperf performance tests over a Cisco WLAN. As part of the tests I recorded the connection speed of the client to the WLC. Afterwards I noted something unusal. For many of the 5GHz tests the WLC reproted a connection speed of M9 SS2 on a 40MHz bonded connection. If I refer to an MCS table I get a value of either 54Mbps or 60Mbps depending on the Guard Interval. If I am generous and say the throughput is 50% of the connection speed, at best we could expect a throughput of 30Mbps. However my throughput tests showed download to the client of up to 190Mbps.

I am running 8510 HA Controller Pair on version 8.3.102.0. and most APs connected to were 3702i.

The only answer is that I misinterpreting the speed vlaue as shown in the Controller, do we know if Cisco have there own MCS chart showing the actual speed represented by their M values? Either that or am I fundamentally misinterpreting something.

Thanks in advance

are you running an 11ac

michaelblum — Mon, 15 May 2017 15:21:23 GMT

are you running an 11ac client and AP by any chance.

MCS9 2SS 11ac gives you above 300Mbps.

MCS9 2SS 11n only gives you the mentioned 54 or 60Mbps

http://www.wlanpros.com/mcs-index-802-11n-802-11ac-chart-3/

Thanks Michael, that makes a

terrywatson651 — Mon, 15 May 2017 20:08:26 GMT

Thanks Michael, that makes a lot more sense, yes I was running an 11ac connection.

topic Thanks Michael, that makes a in Wireless

MCS Values

are you running an 11ac

Thanks Michael, that makes a