Richard,
Diffserv deals with multiple different queuing disiplines, which may or may not be priority based. Please read RFC 2475 and if
you like, B.E. Carpenter and K. Nichols, Differentiated Services in the Internet, Proc. IEEE, 90 (9) (2002) 1479-1494.
Brian
On 2010-09-04 07:57, Richard Bennett wrote:
> DiffServ is a prioritization scheme, Brian, how can you say it's not?
> IntServ is a reservation scheme, and DiffServ attempts to provide
> desired PHBs in practice by sorting packets into priority queues and
> invoking appropriate Link Layer facilities, which are in most cases
> priority-based, such as 802.11e traffic classes.
>
> What on earth could the value of DSCPs be if they didn't map to traffic
> classes in the data link?
>
> RB
>
> Brian E Carpenter <brian.e.carpenter@xxxxxxxxx> wrote:
>> Russ,
>
>> It has been consistently hard to explain that diffserv is not a
>> prioritisation scheme, even within the technical community, let
>> alone to the regulators and the media. I think your comments as
>> quoted are as good as we can expect from journalists.
>
>> It should be a matter of concern to all of us here that the US FCC
>> isn't confused into regulating the technology. It would set a bad
>> precedent for regulators in other countries. I am making no comment
>> as to whether they should regulate carrier's charging practices; that's
>> entirely a national matter that shouldn't concern the IETF in any way.
>
>> Regards
>> Brian Carpenter
>
>> On 2010-09-03 05:47, Russ Housley wrote:
>> > I want the whole community to be aware of the comments that I made to
>>> the press yesterday. Clearly, these comments do not represent IETF
>>> consensus in any way. They are my opinion, and the reporter was told to
>>> express them as my opinion.
>>>
>>> One thing that I said was not captured quite right. The article says:
>>> "With services that require certain speeds to operate smoothly, such as
>>> Internet telephony, calls are given precedence over TV, Housley said."
>>> I actually said that DiffServ can be used to make sure that traffic
>>> associated with applications that require timely delivery, like voice
>>> and video, to give preference over traffic associated with applications
>>> without those demands, like email.
>>>
>>> The whole article is copied below, and it is online here:
>>> http://www.nationaljournal.com/njonline/tc_20100902_7144.php
>>>
>>> Russ
>
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