We have a odd issue that has only started a couple of days ago. We have tried to do some troubleshooting to find the route of the issue but to no avail.
What happens is all printers and photocopiers go offline and then come back online for a few seconds, then they go off line again. The print server is running windows Server 2008, this sits in a 192.168.10.0/24 subnet and all printers and photocopiers sit on a 192.168.11.0/24. These are all communicating on vLan channel 11 but since Monday this sporadic behavior has occurred. We have Dell switches which are stacked but this isn't consolidated to one area of the network its an issue across all switches, We have rebooted the stakes and checked the vLan config but it all looks OK. If you ping a printer from the print server over a 30 minute period we get a 89% failure rate.
Would welcome any guidance and thoughts as to what we can try as we have inherited the network.