I have a very odd situation on my switch stack. Every morning, between 9 and 9:30, there appears to be a broadcast storm and spanning tree confusion.
These HP switches turn all the traffic lights solid green, and overall LAN performance is degraded for some, but not all.
Rebooting the switches, and one in particular, clears the problem for the day. Then, the next day, again between 9 and 9:30, the same thing happens.
I have been tracing things out, doing SNMP and log analysis, spectrum to look for correlations. But today I kept the suspect switch's uplink ports down from 9 to 10 and then brought the switch up, and so far so good.
Attached to this switch is the normal office PC's and Printers. But also an Aruba 7210. I must confess to knowing very little about this box. We used to have a flat VLAN structure but have been expaning that for a few months, and the new VLANS seem to coincide with my problems.
So does the 7210 do something on a 24 hour cycle? I'm really scratching my head over how a problem can happen, then a switch reboot clears it for the day. I have been suspecting a bad NIC somewhere, or cabling, but how would this be just once per day?
As I said, I'm pretty ignorant on the controller. An Aruba engineer helped me set it up, and it has been operating fine for close to a year. But new VLANS means spanning tree has gotten complex, and this seems to be where I am running into problems.
#7210