Why do DHCP servers (specifically Cisco) use "Client-ID Options", not the CHADDR (client MAC) in the DHCP request, for static binding?
From: Configuring DHCP
All DHCP clients send a client identifier (DHCP option 61) in the DHCP packet. To configure manual bindings, you must enter the client-identifier DHCP pool configuration command with the appropriate hexadecimal values identifying the DHCP client.
- Router(dhcp-config)# client-identifier unique-identifier
- Router(dhcp-config)# hardware-address hardware-address type
- For DHCP Req.
- For BOOTP Req.