Hello,
A little device info for you first on what we have.
Cisco 5508 with 16 AP's. Current code is: 8.2.100.0. Encryption is WPA2 + AES. The AP models are AIR-CAP3502I-A-K9. Our internet provider speeds are 100 MB.
We have a Cisco 5508 at our main site with 16 AP's scattered about in various offices. Users inside the main site and remote sites complain of slow internet speeds. This is true with Android, IOS, and Laptops. What's odd is my speed tests from Century Link and Speed Test show download speeds of 10-13 MBs and upload speeds of 65-70 MBs. I can validate no one is hogging the network. After troubleshooting the issue, we ended up calling Cisco support. Cisco support made a few tweaks with data rates (Mandatory, Supported, Disabled) and a few other small adjustments, but no relief on the internet speeds. What's odd is we also performed some iperf tests on the WLAN.
I setup my desktop as the wired client server, and a laptop as the wireless client. The speeds iperf was reporting was 75-80 MBs. The same is true when I reverse the test to make the wireless client the iperf test server and the wired PC the client. We ran several tests. However, when we do a speed test from a wireless device to the internet we only get 10-13 MBs. One of our guys opened a port on the VLAN the wireless AP's were sitting, plugged his laptop in and ran a speed test. The speed tests came back at 75-80 MBs wired in. The odd thing is all wireless devices we used to do a speed test had a huge upload speed of around 65-70 MBs. I would buy the argument of the AP's working half-duplex and being slower if the upload speeds would be low as well. However, every test shows the upload speeds from wireless clients are 65-70 MBs. I also setup a new AP and plugged it directly into the switch to use as testing. I get the same results. We do not have any overlapping channels, and we do not have any interference failures. Cisco told us (Not a problem with the WLAN, iperf proves it) and left us to figure out why getting to the internet is so slow. So to summarize, our wireless clients at all sites have slow internet access. By the way, no one is getting kicked off.
