Apple MacBook Sierra Wireless WIFI 5GHZ

[Valter_Veiga]

MacBook running HighSierra in wireless 5Ghz very instable in access-points 3825, 3805, 3912 with controller C25 running v10.31.04 ou v10.31.04.

After a week of testes the best solution is: Disable 5Ghz and use the 2.4Ghz interface Only

[Peter_Chang]

I've been monitoring this thread closely. We are a heavy Mac school, about 2000 Macs all managed with JAMF Pro. We have just over 900 end clients on Sierra, and we too haven't seen or heard of any problems, (that I am aware of) Our students from Grade 6-12 are 1:1 and own a Mac.

We are currently running:

• 10.41.01.0080 on our controllers, V2110
• but most of our 3935 APs are still on 10.31.04.0009.
• We too have an AP in every classroom only because of the way the school has been constructed in Dubai.

While we aren't using the same APs that you have in your setup, here are a few questions that come to mind, as I too had similar symptoms when we did our Extreme Wireless deployment last year:

• Out of curiosity, how are your channels mapped for your classrooms? auto/manual?
• Have you used Apple's airport command inside terminal, to see neighboring APs and what channel they are on and their signal strength? I believe the command is: /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport /usr/sbin/airport -s
• Based on the output above ensure you don't have close neighboring APs on the same channel. We have seen instability when APs are on the same channel and are close together, aka co-channel interference. Symptoms with this would be slow internet or get booted off WiFi
• Your AP settings seem to be similar to ours. But as a reference, this is how ours is:
• 

[Valter_Veiga]

Yes, i'm running 10.31.05, I'm doing the test off hours, with only one client connected to the AP. Yes, the only clients having problems are macs. Last Year with version V9.xx.xx we had a similar problem with Macs, but at version 9.21.17 all problems were fixed. And I have maintain that version until now. This year I have add new AP2935 and AP3912 and upgrade to V10.

[Joshua_Puusep]

worth noting i have tested with Mac Book Pro's on sierra and Macbook Air's on High sierra, but no regular Macbooks.

[Joshua_Puusep]

Hi Valter, we are running 10.31.05 and do not see any issues on MacBooks running Sierra. Have you looked at spectrum analysis for channel utilization and or interference events? Are all other devices functioning as expected on 5Ghz?

[Valter_Veiga]

Jeremy, what is your controller version you are using ?