From: Adam Roach <[email protected]>
Paul Kyzivat wrote:
> The simple answer to your question is: you must include the to-tag to
> conform to 3261. [...]
I'd like to point out that we've already taken the first steps of
actually breaking 2543 compatibility with RFC 4916. [...]
If the question is "When I generate a non-2xx response, am I required
to add a to-tag?", the answer is "Yes."
If the question is "When I receive a non-2xx response, is it required
to have a to-tag?", the answer is "No."
Dale
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