Hi all, recently I replaced one 6006 with 4507E switch. New 4507E uses SUP6-E supvisor and 4658-RJ45V-E module, the power supply is 4200w. Some user complaint no connectivity for NIC. After the investigation I decide to enable "inline power never" for all switch port, the issue is fixed. But I don't understand why POE can cause the NIC connectivity issue and it seems no relationship between each other.
BTW, one another weired thing is when I connect one PC to one port. The "show ip interface" indicates the port is up,as well as the PC NIC is up, but I can not find any MAC address with "show mac address-table" command. When I switch PC to another port with same configuration, the issue solved. Is it a hardware failure for that switch port?