You can only check the MAC address --> port mapping on a layer 2 switch. 'show cam dynamic' will display all the MAC to port mapping. It's a two step process to find out which port on the switch a host is connected to. To find out which port a host is connected you need to get the MAC address of the device from the ARP table on the layer 3 gateway (Router/layer 3 switch like MSFC) by doing 'show ip arp' and then do a 'show cam (mac_address) vlan (id)'. If you know the MAC of the host you want to lookup the port then you can skip the first step.
Thanks a bunch....i wish cisco would come up with a command that would show all ip address that are specifically mapped to the ports.
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