AP55 are going offline (connected to SG 135W 9.509-3)

Hi,

need to come back to this "case".

APs are still going offline:

Is there any possibilty to figuer out who causes the problems? The APs or the XG?

One time it is one AP, one time another and sometimes all 3 of them.

The wired AP is allways online.

I changed the Frequencies but no real change.

Because it is a house on a big groud there are even 1-2 other WLANs available.

Can I figure out if an AP is going to reboot (power lost)?

Also strong:

Get couple of thoses entries in SG Wireless Log: ath: phy2: Failed to stop TX DMA, queues=0x002!

And also:
2019:05:29-13:06:51 RootAP add_radio_mapping.sh: AP55 detected: Using on-the-fly ACS procedure
2019:05:29-13:06:51 RootAP add_radio_mapping.sh: AP55 detected: Using on-the-fly ACS procedure
2019:05:29-13:06:52 RootAP astaro-functions.sh: Running ACS-survey on 2.4GHz...
2019:05:29-13:06:52 RootAP add_radio_mapping.sh: Channel 1 busy time 57/264ms, 21%
2019:05:29-13:06:52 RootAP add_radio_mapping.sh: Channel 2 busy time 16/218ms, 7%

look at the datetime....

All other log entries are OK (representing the correct time).

Can you PM me the complete log file? I want to check what channel did the APs select and alongside, reading your previous reply, that a physically connected AP is always online, I suspect that the issue is related to channel congestion.

You can choose a specific channel for an AP instead of using "Auto" option. This Channel selection is done at start-up and hourly using background scans.

As multiple APs are being used, they should be configured to use different channels if their signals will overlap; and these channels should be as far apart as possible. For example, you are using a 2.5 GHz band so you have channel 1, 6 and 11 which will never overlap. So you can configure the APs in the following manner,

AP1: channel 1

AP2: channel 6

AP3: channel 11

Alongside, it is also important to ensure that access points are not scanning for the best channel, at the same time, as it is likely that they will all end up using the same channel. This could happen if the UTM boots all of the access points at the same time, or if you have configured the access points to all scan at the same time using a time definition.

Configure different time based definitions and  assign them to the SSiDs in the Advanced option for a Wireless Network definition.

Please monitor and let me know the results after the configurations changes.

Thanks,

Hi,

I changed channels and forced direct ones (one Channel per AP).

Quitness since 24h. No interruption. Good news?!

I'll keep you informed.

Thanks for the update, please keep us informed. This could help others with similar issue. 

Thanks,