Hey AKH223 in the end the problem was we have om1 fiber in the building with lrm transceivers the issue was because the patch cables where dirty, nnot the right type and not plugged in correctly. once I had everything plugged in correctly with the right cables and transceiver and plug in the correct way with fiber conditioning cables we now have 30 closets stable at 20g per closet and has been rock solid hope this helps you out ... View more

I have checked and confirmed that all vlans on both ends of the trunks are identical   I did enable udld to enforce and stp loop guard on my agg trunk ports    the udld is causing an error from a neighboring switch that is connected to the same core not directly connected to the stack that is throng the error       ... View more