On 2011-07-28 16:49, Kevin Fall wrote:
> Thanks for the quick response.
>
> Here's what my reading revealed, and you can tell me if I'm in error or not...
>
> RFC3260 tells us that the first six bits (not 8) are called the DS Field or Differentiated Services Field, and the subsequent
> two bits are referred to as ECN ("ECN field" according to RFC 3168). Same applies for what was formerly the IPv6 traffic class byte.
>
> That said, RFC 3260 is Informational, yet claims to update standards-track RFCs 2474 and 2597. I'm not quite sure what sort of status that
> leaves us with. [?]
It can't. That claim shouldn't have been published IMHO. (And yes, I was co-chair
of the diffserv WG at the time). However, it invokes BCP 37 = RFC 2780
which is normative, so probably supersedes RFC 2474. 2780 doesn't answer your
question though, since it refers to the 6-bit DS field and not to the whole
byte or octet except as "superseded".
I think you will need to add a complicated footnote on this.
On 2011-07-29 01:10, Thomson, Martin wrote:
> On 2011-07-27 at 18:03:13, Brian E Carpenter wrote:
>> > The second byte in an IPv4 header is called the Differentiated
>> > Services Field.
>
> I believe that this has been obsoleted by RFC 5241.
Good one :-)
Brian
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