Hi thanks for your quick answer… yes of course… here it is for another switch…
the graphs of the last 4 hours and before 30m the last down message…
Notice that check mk has two NICs, one on management network (same lan with switches) and the other from the network that users login to GUI…
P.S. there are other switches with longer rta time up to 40-50ms on the same lan… the max depth of serial connected switches is 5… On another site with same setup (different location) these statistics are much better with no timeouts (other checkmk server)
FYI my server runs on ubuntu 22.04 on a Hyper-V VM and the load of the appliance is pretty low
Thanks!