The string defined by user to fill in the
node identifier in the verbose mode.
If the value of hpnicfDhcpSnoop2IfOpt82CIDMode is NOT
'verbose', or the value of hpnicfDhcpSnoop2IfOpt82CIDNodeType
is NOT 'userDefine', it is set to a zero-length string
automatically.
Otherwise it must be set to a non-zero length string.
The SET operation of this object must be with the SET
operation of hpnicfDhcpSnoop2IfOpt82CIDMode and
hpnicfDhcpSnoop2IfOpt82CIDNodeType.