HELP PLEASE! - random network issue with PCs going offline
I'm hoping someone here might be able to help me work this out. We have a HP Procurve network with a 5406 at the core and a mixture of procurve edge switches.
Last week PCs, at random, started going offline just for briefly (a couple of seconds), long enough for the PCs to lose contact with all the servers but then asking to be resynched so they could pickup their desktop items off the server again etc. Annoying at the best of times, but not great for those using software connected to the SQL box.
It is happening randomly across the entire site. It's not a whole switch at a time - I've observed it happen on my PC without affecting my colleagues PC even though we're connected to the same switch, and vice versa. There doesn't appear to be a set interval of when it happens or anything. Nothing untoward, as far as I can tell, showing up on the switches (using the switches gui).
We have two VLANS one for our VOIP system and one for data. Spanning Tree is enabled.
Has anyone else had similar experiences or have any idea what could be causing it. We are struggling and as more people come back from their hols then we are going to see it more often just because more PCs will be in use.