https://community.hpe.com/t5/switches-hubs-and-modems/arp-poisoning/m-p/5053828#M27780 Thanks I'll give them a ring in the morning. Tue, 19 Jun 2007 18:26:16 GMT DavidDCSD 2007-06-19T18:26:16Z https://community.hpe.com/t5/switches-hubs-and-modems/arp-poisoning/m-p/5053826#M27778 I have a 5300 I'm using as a core for our network. We are installing 30mbit pipes between sites (13) to replace our T1's. I have our LAN on 172.16.x.x and the Broadcast for the up links on 10.0.0.x. The problem I am encountering is whenever I bring these circuits up they are very intermittent. But when I clear the arp cache on the core they come right up only to drop again about 30 seconds later. Tue, 19 Jun 2007 17:39:13 GMT https://community.hpe.com/t5/switches-hubs-and-modems/arp-poisoning/m-p/5053826#M27778 DavidDCSD 2007-06-19T17:39:13Z https://community.hpe.com/t5/switches-hubs-and-modems/arp-poisoning/m-p/5053827#M27779 Could be ARP poisoning as you've suggested. <BR /><BR />E.10.62 does contain an ARP related fix - you'll need to call ProCurve support to get your hands on this. Tue, 19 Jun 2007 18:24:18 GMT https://community.hpe.com/t5/switches-hubs-and-modems/arp-poisoning/m-p/5053827#M27779 Matt Hobbs 2007-06-19T18:24:18Z https://community.hpe.com/t5/switches-hubs-and-modems/arp-poisoning/m-p/5053828#M27780 Thanks I'll give them a ring in the morning. Tue, 19 Jun 2007 18:26:16 GMT https://community.hpe.com/t5/switches-hubs-and-modems/arp-poisoning/m-p/5053828#M27780 DavidDCSD 2007-06-19T18:26:16Z https://community.hpe.com/t5/switches-hubs-and-modems/arp-poisoning/m-p/5053829#M27781 Applied update was not poisoning Fri, 22 Jun 2007 14:55:26 GMT https://community.hpe.com/t5/switches-hubs-and-modems/arp-poisoning/m-p/5053829#M27781 DavidDCSD 2007-06-22T14:55:26Z