Option negation

[Glenn Satchell]

This topic comes up from time to time. Unfortunately there is no way to
remove an option. The best you can currently do is set it to a null or
empty string, but this is not the same as not sending the option.

regards,
-glenn

On Wed, May 4, 2016 6:11 am, John Hascall wrote:
> I know that options set in more specific scopes override those set in less
> specific scopes, but can I "undo" an option setting?  That is, lets
> imagine
> I have this:
>
> option option-66 code 66 = text;
>
>
> and then in a class scope, I have:
>
> class "someclass" {
> ​​
> ​        ​
> match substring(hardware, 1, 3);
> ​        ​
>
> *option option-66 "blah blah blah";*}
> subclass "
> ​someclass
> " 00:0
> ​1​
> :
> ​02​
> ;
>
>
> I know that, given that host whatever falls in that class scope, that:
>
> host whatever {
>
> ​        hardware ethernet 00:01:02:03:04:05;​
>
> ​
> *option option-66 "fe fi fo fum";*
> }
>
>
> works
> ​ to change its option​
> , but what if
> ​I ​
> want *host whatever* not to get
> ​ that option at all?  How do I do that???
>
> host whatever {
> ​        ​
> hardware ethernet 00:01:02:03:04:05;​
>
>         *no option​ option-66;       <== just making this up*
> }
>
>
> ​Many Thanks!
> John​
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