https://community.hpe.com/t5/switches-hubs-and-modems/engine-length-errors/m-p/4667839#M23330 I receive this snmp trap once in a while from a good old HP 4000M: "AddrMgr: Switch Engine length errors". I see nothing in the switch event log. Any idea what it is ? Thu, 29 Jul 2010 13:02:42 GMT Lsdsoft 2010-07-29T13:02:42Z https://community.hpe.com/t5/switches-hubs-and-modems/engine-length-errors/m-p/4667839#M23330 I receive this snmp trap once in a while from a good old HP 4000M: "AddrMgr: Switch Engine length errors". I see nothing in the switch event log. Any idea what it is ? Thu, 29 Jul 2010 13:02:42 GMT https://community.hpe.com/t5/switches-hubs-and-modems/engine-length-errors/m-p/4667839#M23330 Lsdsoft 2010-07-29T13:02:42Z https://community.hpe.com/t5/switches-hubs-and-modems/engine-length-errors/m-p/4667840#M23331 I suspect this is your answer:<BR /><BR />These messages indicate that the switch forwarding engine receives an IP packet of a length that is less than the minimum allowed length and then drops the packet.<BR /><BR />Tore Fri, 30 Jul 2010 07:07:44 GMT https://community.hpe.com/t5/switches-hubs-and-modems/engine-length-errors/m-p/4667840#M23331 Tore Valberg 2010-07-30T07:07:44Z