Usage : show optionvalue all or all : To display all Option values set including those for the user classes and vendor classes. ...

Usage   : show optionvalue [all] or <[user=userName] [vendor=vendorName]>
          all         : To display all Option values set including those for
                        the user classes and vendor classes.
          userName    : To display the option values set for the user class 
                        userName(Optional). Tag user= must be provided.
                        (default is the global userName set by using 
                        Set userclass). This is valid only for
                        Windows 2000 Server, Windows Server 2003 and 
                        Windows Server 2008. 
          vendorName  : To display the option values set for the vendor class 
                        vendorName(Optional). Tag vendor= must be provided.
                        (default is the global vendorName set by using 
                        Set vendorclass). This is valid only for
                        Windows 2000 Server, Windows Server 2003 and 
                        Windows Server 2008.
Purpose : To enumerate and display all options whose values are set for the 
          current MultiCast Scope for the DHCP Server.
Example : show optionvalue
          To enumerate and display all Global option values set for the
          current DHCP Server.