Can't get a 802.11ax client connecting with 2 special streams!

[tlarsen]

Hi,

I have a client supporting 802.11ax (Intel® Wi-Fi 6 AX200). In the specs it supports 2 special streams.

But I can't connect it with more than 1!

The test setup is a C9800-CL WLC with a 9120 AP connected. The only place I can find something you can change is the Configuration > Radio Configurations > High Throughput. And there all MCS SS is enabled. Also if I connect the client with 802.11ac it's connecting with ss2. Any ideas?

[tlarsen]

Hi again,

I found that this could be a 17.3.3 bug. Because the Current TxRateSet (m9 ss1) is not showing the right value!

When I have a client connected with Current TxRateSet m9 ss1 I can see that the AP is using channel width on 80MHz.

And the Client is showing that it runs MCS rate on download speed at 721Mbps and upload speed on 1081Mbps. And if we compare that with the MCS table looks like it's running 2 special streams. So what ever the WLC is showing in the client information, the client is having the expected speed, not only tha MCS rate but also when testing it with iperf:)

[marce1000]

 - You may find these bug reports informative although I think they do not immediately pin-point your issue : 

               https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvt87904

               https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz06097

  M.

[JPavonM · Accepted solution]

I discovered this is a cosmetic bug in IOX-XE (CSCvx54426 ) and it should be fixed in short.

HTH
-Jesus
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