The string defined by user to fill in the
node identifier in the verbose mode.
If the value of hh3cDhcpSnoop2IfOpt82CIDMode is NOT
'verbose', or the value of hh3cDhcpSnoop2IfOpt82CIDNodeType
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 hh3cDhcpSnoop2IfOpt82CIDMode and
hh3cDhcpSnoop2IfOpt82CIDNodeType.