Not ignoring ports on a Stacked Cisco 3750E?

[edirrak]

I'm trying to Setup MAC Track to help inventory our switches and for some reason I cannot get it to ignore a port that is a switch up-link port that connects on a set of stacked 3750E's.

I have tried Gi2/1/3, GigabitEthernet2/1/3 but neither works.

I found this: http://forums.cacti.net/about37675.html which seems like it might be helpful, but I can't figure out where he is adding that code to get the port output to print.

Anyone run across this?