Hi,
I found something interesting, if I specify for a DHCP-Lease the MAC and the Client-ID, it seems only the Client-ID is used:
Please see, the “MAC Address” …AB:68 is specified, but the …AB:6B is the “Active MAC Address”. In this case the Client-ID for all Interfaces is the same.
I thougt if specified the MAC AND Client-ID must match, but it seems if a Client-ID is specified, the MAC is not considerated anymore?!
DHCP server only cares about Client ID. Client ID is value supplied by DHCP client when requesting DHCP lease. It usually does contain MAC adderss, but it can be some other identification. Client ID can be of 3 types: text, integer number and MAC address.
MAC address, shown by DHCP server, is FYI only. It shows MAC address of NIC which communicated with DHCP server. In case DHCP relay is used, DHCP server will see MAC address of DHCP relay for example. I’m not sure what’s the difference between “MAC Address” and “Active MAC Address” though.