We currently are running ver. 3.7.1 s/w on our pp8600. We have seen on a few occasions various GBIC ports shut down for unknown reasons and not come back active without intervention. We swap ports & GBIC's at each end and still no connectivity. Test neg. speeds with still no connectivity. The link generally comes back up eventually. We have seen this with both SX and XD GIBC's. Anybody have any ideas what may cause this?
Thanks in advance.