+ 0 Votes It sounds like NickNielsen Moderator Updated - 4 years ago Somebody built a VM and didn't bother (or didn't know how) to disable DHCP in the session. And why are you buying console cables from HP? If you have physical access to the switch, just use the appropriate cable for the console port: null modem or Cat 5 crossover. I've never seen an HP blade switch, but I've heard that for those you can break out your Blackberry or USB drive cable. etu + 0 Votes Now THAT's weird NickNielsen Moderator Updated - 4 years ago The MAC is on the network, but it isn't in an ARP table? Unless I've totally misunderstood switching for the past 10 years, that's just not possible. If it's on the network, that MAC has gotta be in an ARP table somewhere. The only conclusion I can reach is there's a switch somewhere that you haven't found yet. That or you have multiple systems infected with some kind of server bot. Edit: You will probably get more (and better ) help over in the Questions forum. Click on the "Ask a Question" end of the Start a Discussion button and post all the information you've provided here. There are TR peers who hang around in the questions forum, waiting for an opportunity to answer somebody's question. Don't forget to reward the good answers by marking them helpful.