Re: SRV RR Questions

[Michael Mealling <michael@neonym.net>]

On Thu, 2002-12-05 at 17:48, Cricket Liu wrote:
> Dave Wilcox wrote:
> > Are the underscores really required? or could I use:
> > 
> > service.protocol.target
> 
> The underscores are there by design, to avoid naming collisions with
> existing domain names.

As the author of RFC 3403 and 3404 and the co-author of the update to
RFC 2916 (ENUM), I get asked this quite a bit. Usually of the form:

The DDDS documents don't have the underscores that RFC 2782 says have to
be there. Does 2782 require me to put them in there or is RFC 3403
right?

The issue is/was that one of the iterations of the 2782 draft had
language saying that, if SRV was being used in a context where a client
was explicitly directed to retrieve a set of SRV records for an exact
domainname instead of doing the query-language-encoded-as-a-domainname
defined in 2782, then there was no requirement to use the underscores.
Due to time and those inevitible miscommunications that text never made
it into the final version that became 2782. Thus there is now a
confusion between 2872 and 3403 about whether or not '_' is needed in
the specific way that the DDDS uses SRVs.

Is it possible to get some kind of clarification that this is indeed the
case and that I don't need to go update 3403 and 3404 just to stick an
underscore into a domain-name that doesn't need it?

-MM


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