Frequent wireless disconnections occurring since upgrade to 10.21.01.0065

[Steve_Ballantyn]

I apologize for the redundant question. It seems like "clients disconnecting" is a common topic. But I am starting a new one, because it seems that every situation is different.

I have a C5210 and a bunch of 3825i AP's all over my hospital. Just before Christmas I upgraded to the latest firmware, 10.21.01.0065. Since then I am getting complaints from users (across the board) that they are frequently getting dropped from WiFi. After it happens they are easily able to reconnect and all is well. But it's driving them mad as they will be in mid-sentence documenting in their various applications and then it sort of freezes up and KAPOW! Connection lost!

There is nothing newer to upgrade to. And I suppose I could downgrade to see if the problems goes away. But I would rather seek out the source of the problem and fix it. Especially if it's just something wacky in my configuration.

I plan on putting in a call and opening a ticket on Monday morning with support. But in the meantime - does anyone have any ideas for me? I use Netsight and Purview, and I have all of these logs and diagnostic data at my disposal, but I am not really sure where to start. I suppose the first question is - does anyone else have this issue with this firmware?

[Ronald_Dvorak]

ssh into the AP

#change directory
cd /tmp/log

# to show the complete content of the file - increase the window size as you'll get a
# lot of messages, or log it to a file with your ssh app
cat ap.log

or

#to get the last messages "live" as they get written into the file by the AP
tail -f ap.log

The ssh timeout is per default very short so it's a good idea to increase it so you don't get logged out all the time...

cset sshtimeout 99999
capply
csave

[Laura]

How do I view the ap.log file? I tried to ssh into ap with admin/new2day, but couldn't get it to work.

[Jeremy_Gibbs]

Since many clients won't connect to 5 Ghz, band steering tries to force 5 Ghz capable clients to the 5 Ghz radio.. Freeing up resources for those who only have a 2.4 Ghz radio. Works well in areas of good 5 Ghz coverage. If 5 Ghz is sparse, I would hold off.

[Steve_Ballantyn]

Wow, okay. Thanks for driving me to those options. I do not have anything configured there yet.

[Jeremy_Gibbs]

Oh, do you have band steering enabled? It's under AP->Load Groups->Radio Preference. You create a Group and assign APs and WLANs to it.

You might not be using it: