Hi,
I have a super annoying problem that is not Fedora specific, but it's been driving me nuts for a few weeks. Any idea for a more appropriate forum to post this in is as useful as an idea what's going on or next steps.
Linksys WRT600N using dd-wrt in client mode, with laptop and Intel NUC connected via wired. Both laptop and NUC would get fast.com and speedtest.net download speeds of ~16Mbps for about 30 minutes then tank to maybe 150kbps after that until the Linksys radio was disabled then renabled, or just rebooted. The same thing happens when flashed with openwrt except it only takes 5 minutes to manifest.
I assumed it was a bad radio on the WRT600N or maybe it's some hardware incompatibility with the local APs. I went down the road of multihoming (in previous emails I was sorting out how to get wireless routed by default for internet and wired for local stuff.)
Well get this. The Apple laptop wireless always gets 16Mbps, it never tanks. The Intel NUC does the same thing as the WRT600N. It gets 16Mbps for 5-10 minutes, then implodes until I do a 'nmcli c down' followed by 'nmcli c up' sort of thing, and then it gets good bandwidth.
So WTF?
I just noticed this odd duck behavior:
# sudo journalctl -b | grep AssocResp
laptop fedora 24 (same results with fedora 23) https://paste.fedoraproject.org/378329/
intel NUC https://paste.fedoraproject.org/378331/
The Apple laptop wireless is bouncing between two APs exactly two minutes apart all the time. This is constant over weeks. But the Intel NUC doesn't do that, it pretty much sticks with one AP for hours at a time. All three devices are within 2 meters of each other. I have no idea where these APs are.
Whatever is causing the Apple wifi card to go back and forth between two APs is somehow acting like a disconnect/reconnect "fix" that I've been doing manually with the WRT600N and NUC, which uses an Intel 3165 wireless card. Where the other two persist in holding on to an AP where the performance has face planted.
My Motorola Android phone also doesn't have the problem.
Maybe this is enough information to forward to the IT folks who manage this wifi setup? Is there anything else I should provide? Or some way of making this write up more concise?
iwlist gets me this
Cell 01 - Address: B4:C7:99:ED:F8:A8 Channel:11 Frequency:2.462 GHz (Channel 11) Quality=46/70 Signal level=-64 dBm
Cell 02 - Address: B4:C7:99:EE:25:08 Channel:1 Frequency:2.412 GHz (Channel 1) Quality=60/70 Signal level=-50 dBm
Cell 08 - Address: B4:C7:99:ED:F0:C8 Channel:1 Frequency:2.412 GHz (Channel 1) Quality=30/70 Signal level=-80 dBm
I have no idea why anything would pick cell 08 with that kind of signal, but bloop there it is.
I don't think this is an 802.11g vs n issue. The WRT600N does n on dd-wrt, but only bg on openwrt. The Apple wireless is not using proprietary driver, so 802.11n isn't supported, only bg. The Intel NUC supports n as well as many others.
Thanks,