The state of the mac address assigned to this port.
addressBlackhole (1) the mac address is a blackhole address,
Each packet whose source address is equal to this address will be
dropped by the agent.
addressUserConfig (2) the mac address configed by user with this state
are preserved across power cycles and resets.
addressDot1xAuth (3) the mac address is authorized by 802.1x authenticator,
User can not configure this mac address. This value is used for GET
and GETNEXT operation.
addressRALM (4) the mac address is authorized by RALM authenticator,
User can not configure this mac address. This value is used for GET
and GETNEXT operation.