unsetting an option?

David W. Hankins David_Hankins at isc.org
Tue Apr 22 22:48:24 UTC 2008

On Mon, Apr 21, 2008 at 08:04:45PM -0500, John Hascall wrote:
> Is there any way to do "this":

For text option types, I've seen people configure zero-length values
as a way to do this.  The sources treat zero-length values as an error
as relating to IETF DHCPv4.

I think there is no legal "zero length" syntax for an ip-address
option however, so this isn't really helpful.

The truthis that we need to create a 'negative cache' feature in the
option cache code, and provide a way to create a negative entry.  Zero
length options are often used in DHCPv6, so this serves both

Ash bugud-gul durbatuluk agh burzum-ishi krimpatul.
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David W. Hankins	"If you don't do it right the first time,
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Internet Systems Consortium, Inc.		-- Jack T. Hankins

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