The format of the circuit ID suboption of DHCP
option 82.
'hex' is the hex format.
'ascii' is the ascii format.
'undefine' is the undefine format.
If the value of hpnicfDhcpSnoop2IfOpt82CIDMode is
'normal', this object is set with 'hex' automatically
and cannot be set with 'undefine'.
If the value of hpnicfDhcpSnoop2IfOpt82CIDMode is
'verbose', the default value of this object is 'undefine'.
If the value of hpnicfDhcpSnoop2IfOpt82CIDMode is
'userDefine', this object is set with 'ascii' automatically
and cannot be set with other value.
The SET operation of this object must be with the SET
operation of hpnicfDhcpSnoop2IfOpt82CIDMode.