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 184.108.40.206. 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
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