I have a 4506 running 7.6.2. I have the following blades running in the chassis. WS-X4013 - SupII, and 4 WS-X4448-GB-RJ45 - 10/100/1000 blades. I have several devices on multiple blades that will not connect at 100mbs / Full Duplex. The devices show connected but there is no mac address and windows gui shows cable disconnected. The switch port speed needs to be in auto or 10mbs to operate. There are existing devices hard set that have been working fine for months. No errors in the log, there are multiple ports showing the same number of xmit errors. The switch is not expreiencing slowness at this point. Any help would be appreciated.