[rubberroad]

Same problems for me, experienced this a lot on my home wifi, using a dual band, modem / wifi router combo. Problems ONLY occurred on my MacBook Pro, no other devices.

Purchasing a dedicated modem and using an Apple AirPort Extreme was the only thing that resolved the issue, which annoyed me and made me feel like Apple is further locking me into their ecosystem of devices.

[tw04]

MBPs don't support certain channels which is maddeningly frustrating. Trying to find from my notes which channels those are, but when I finally changed from auto to hard-setting to channel 100, all my issues with MBPs on my network went away.

[SysArchitect]

There are certain channels in the 5Ghz range that require the access point to do checking to make sure they don't actively interfere with radar...

See here for a document from Cisco describing the issue:

http://www.cisco.com/c/en/us/td/docs/routers/access/3200/sof...

interestingly enough, hard setting the channel to 100 might violate FCC regulations, and DFS should still be used...

[tw04]

There isn't radar within 100 miles of me so I'm not too concerned. Regardless, this AP firmware won't let you hard set to channels the FCC requires DFS on.

[SysArchitect]

Channel 100 requires DFS... so you did set it to a channel that requires DFS.

[xhruso00]

Can you please find the list? I think there are just 13 channels (or 11 depends where you are) 2.4Ghz

[tw04]

Still can't find it. I haven't had issues on 2.4ghz, this is on 5ghz. This thread seems to cover about the same thing I discovered:

https://www.reddit.com/r/apple/comments/2zo1uo/if_you_have_s...

[NolF]

I'll have to give that a go. My MBP performs poorly on dual-channel WiFi