RE: [Sip] comments on draft-gurbani-sip-ipv6-abnf-fix-00

> > However concerning things like To/From sip-uri's host, 
> > I assume that there will currently be poor 
> > interoperability if devices adjust things per 
> > section 2.2's flexibility (beyond hex case) 
> > within a transaction or dialog.
> 
> To and From headers shouldn't be a problem because 
> applications really shouldn't be comparing them; they 
> should be treated as comments.
> IIRC, there is some circumstance during registration 
> where URI equivalence is important, though.

RFC 3261 still requires the To/From uri's to not change.  However I
agree that it won't be a problem if vendors have adjusted/deployed their
implementations based upon rfc3261's comment that such a requirement is
expected to be deprecated in the future or have accommodated the IPv6
address representation flexibility.

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