Cisco Switching/Routing :: 4500 Switch Reports Ports As 10 / Full While Other Side Reports 100

Oct 31, 2011

we have a 4510r-e running  12.2(50)SG1 w/ various rj45 line cards and a 24 port glc card.at any given time, i see 10's of ports in 10/full.i go to the station, and find the station in 100/full or 1000/full.

i go to the switch w/ my fluke, connect it directly to the switch w/o any intermediate infrastructure except a 50cm cat6 patch cable.the fluke reports 1000/full, but THE SWITCH PORT REPORTS STILL 10/FULL.all ports are config'd 'speed auto'  and 'duplex auto'.
 
the switch  seems to be erroneously reporting 10/full.there are no errors logged on any of the ports and there is successful communications even when the station and switch port report different speeds.even though there are no errors logged nor reported  by 'show int [port]' nor 'sho int count error' certain killer applications crash on some stations. (the applications are GHOST (which dumps disk images from a server to multiple stations) and NETOP (which i sused in a classroom to transmit an instructors screen to a room full of stations)  both of which broadcast and/or multicast.all nodes involved in the above 2 applics are on the same vlan and same phyiscal subnet.

the ports which report 10/full vary and occur even when the above applics are not in use.the only way i found to clear this 10/full report is by either a hardware reset of the entire module or by unplugging the cable, the execute on the port shutdown, speed auto, no shutdown, reconnect cable.then it's just a matter of time until it pops back to 10/full in a few minutes,hours or days.
 
how to address the killer applic problems besides restructuring the whole net by defining separate vlan for each lab of 20 or so stations?

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