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Thanks for all of the helpful tips. It turned out that someone had tidied up an empty office and plugged two Ethernet wall ports into the same desktop Ethernet switch - actually into the uplink and downlink of the same port. In created a lot of broadcast packets and the HP and Xerox printers couldn't handle the traffic. -----Original Message----- From: Doug Nelson [mailto:[log in to unmask]] Sent: Monday, February 11, 2008 5:12 PM To: Laurence Bates Cc: [log in to unmask] Subject: Re: [MSUNAG] HP Jetdirect printers disconnecting On Mon, Feb 11, 2008 at 01:02:07PM -0500, Laurence Bates wrote: > We are seeing a lot of HP Jetdirect printers disconnecting from the network > today. It started this morning and many printers will only operate for a > few minutes before they disconnect. Is anyone else seeing this? Any ideas? Laurence, Take a look at the network interface graphs for your building. It looks like something within the building network is generating a broadcast storm. The broadcast traffic graphs show a constant broadcast rate averaging over 6,000 packets/sec since Friday noon. Doug -- Doug Nelson, Network Manager | [log in to unmask] Academic Computing and Network Services | Ph: (517) 353-2980 Michigan State University | http://www.msu.edu/~nelson/