agentDhcpServerManualPoolClientHWAddr 1.3.6.1.4.1.4526.10.12.2.3.1.8

It specifies the hardware-address of a DHCP client. It is valid for manual bindings only. It displays 'unconfigured',if the binding type is 'un-allocated',or,'dynamic'. After hardware-address, hardware-type will be configured.