802.11ac & WIFI-6 clients getting low bandwidth speeds on 9800 CL WLC

[Evanjrosado]

Hi Everyone,

I hope someone can assist me on this one. I migrated my home Cisco lightweight network from a physical 2504 WLC to a virtual 9800 CL WLC 17.2.1 with a 3802e running flexconnect and a catalyst 1920 ap centrally switched. I put together and attached a diagram in hopes to make what i'm doing easier to understand and to have my work double checked because i'm surely no wireless expert :). 

So the problem i'm having is that my clients are getting speeds no higher than 90Mbps. For example in my home I have a  windows 10 client with a WIFI-6 capable adapter showing 1.2Gbps in the adapter status reading(see attached) and another windows 10 client with an 802.11ac client showing 866.7Mbps in the adapter status reading. Every time I run an iperf between both clients on the same WLAN the reading show that the clients are not getting anything over 90Mbps. I'm confused why this is occurring. 

I have tried bonding channels at 40, 80, and 160 but this only improves throughput minimally. Also when i run a show client on the AP it shows the these clients are getting 802.11ax and 802.11ac speeds with multiple streams. 

Can anyone help me with some pointers? 

[Evanjrosado]

That did the trick :). Thanks so much for everyone's input and feedback. I setup a pretty cool infrastructure at home to stay on top of current technology and make recommendations. I have to understand that I cant expect the theoretical throughput. There's an overhead tax for the various processes that take place including interference. 

Do you have any experiences with configuring ISE usecases running flexconnect? Just curious

This is a test from a 802.11ax client to a wired client. 

C:\Users\evanr\Downloads\iperf-3.1.3-win64\iperf-3.1.3-win64>iperf3 -c 172.16.217.60 -f m -b 2g
Connecting to host 172.16.217.60, port 5201
[ 4] local 172.16.101.100 port 55197 connected to 172.16.217.60 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 26.6 MBytes 223 Mbits/sec
[ 4] 1.00-2.00 sec 22.1 MBytes 186 Mbits/sec
[ 4] 2.00-3.00 sec 25.1 MBytes 211 Mbits/sec
[ 4] 3.00-4.00 sec 32.1 MBytes 270 Mbits/sec
[ 4] 4.00-5.00 sec 43.9 MBytes 368 Mbits/sec
[ 4] 5.00-6.00 sec 42.4 MBytes 355 Mbits/sec
[ 4] 6.00-7.00 sec 37.1 MBytes 312 Mbits/sec
[ 4] 7.00-8.00 sec 40.4 MBytes 339 Mbits/sec
[ 4] 8.00-9.00 sec 43.1 MBytes 362 Mbits/sec
[ 4] 9.00-10.00 sec 44.2 MBytes 371 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-10.00 sec 357 MBytes 300 Mbits/sec sender
[ 4] 0.00-10.00 sec 357 MBytes 300 Mbits/sec receiver

iperf Done.

[Scott Fella]

We have ISE working with not local and FlexConnect for 802.1x only. We don’t use ISE for guest as we decided to just have that wide open for simplicity.

[Scott Fella]

You should also try Iperf with multiple streams, 3-5. Make sure the server is defined for multiple streams also.

[Evanjrosado]

Thanks Scott. Very helpful. I'm content with my wireless speeds now