Ping loss every 10 minutes

Hello,

We have some network consisting of over 50 managed network switches. Mostly HP (Comware) and Aruba. And some small unmanaged switches, where not possible for additional network drops.

Last week we started experience problem. About every 10 minutes 2 ping lost. All RDP screens freeze, many folk working from home, so they not happy :)

All switches have STP enabled, but not really implemented. Root switch have "bridge priority 0".

I started implement bridge priority at one hub spoke, but it not change anything.

Doing MSTP and something like this

Root 0 Building 12288 Access 245476 If anything chained to Access switch then 28672 

I counted network diameter of 9 at broadest. . Do I need some MSTP instances or something, because diameter is over 7?

All switches send logs to syslog server, at that times I see nothing interesting.

I read there that most possibility is network loop, it mentions same 10 minutes. https://community.spiceworks.com/topic/2119207-topology-changes-spanning-tree

How can I find it ? :)

Tried pinging from many locations, it follows mostly 10 minutes intervals.

2/20/2021 5:20:03 PM - Request timed out. 2/20/2021 5:20:08 PM - Request timed out. 2/20/2021 5:30:27 PM - Request timed out. 2/20/2021 5:30:32 PM - Request timed out. 2/20/2021 5:33:49 PM - Request timed out. 2/20/2021 5:33:54 PM - Request timed out. 2/20/2021 5:37:31 PM - Request timed out. 2/20/2021 5:37:36 PM - Request timed out. 2/20/2021 5:40:57 PM - Request timed out. 2/20/2021 5:41:02 PM - Request timed out. 2/20/2021 5:51:22 PM - Request timed out. 2/20/2021 5:51:27 PM - Request timed out. 2/20/2021 6:01:47 PM - Request timed out. 2/20/2021 6:01:52 PM - Request timed out. 2/20/2021 6:12:12 PM - Request timed out. 2/20/2021 6:12:17 PM - Request timed out. 2/20/2021 6:22:38 PM - Request timed out. 2/20/2021 6:22:43 PM - Request timed out. 2/20/2021 6:33:02 PM - Request timed out. 2/20/2021 6:33:07 PM - Request timed out. 2/20/2021 6:38:37 PM - Request timed out. 2/20/2021 6:38:42 PM - Request timed out. 2/20/2021 6:49:23 PM - Request timed out. 2/20/2021 6:49:28 PM - Request timed out. 

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