Re: [RE] Bandwidth at any speed presentation
I think what John meant by "unmanaged" was the opposite ... there is no
current way to enforce priority usage, so any device can use P8 and swamp
any port. "Managed" means that the use of priorities is enforced by the
network ... this has all sorts of implications, and there are all sorts of
ways to do this ... which is the reason Residential Ethernet is a different
beast that existing Ethernet, and that we have lots of work to do.
On 12/5/04 5:41 PM, "Varuni Witana" <varuni@NICTA.COM.AU> wrote:
> Unfortunately I was unable to attend the last meeting but I have been
> following the discussions on the ResE mailing list with interest.
>
> I have a question on the presentation made by John Gildred at the last
> meeting. I'm not sure what is meant by an unmanaged stream (slide 4).
> Do you mean a stream with unmarked packets (no priority assigned)? If
> thats the case, since switches forward unmarked packets at the default
> (lowest) priority the scenario you depict on slide 5 would not happen
> as the unmarked packets would be assigned priority P8 rather than P1.
>
> Regards
> Varuni
>
>
> --
> Varuni Witana
> Senior Researcher
> Embedded, Real-Time, and Operating Systems
> National ICT Australia Ltd.
> Bay 15, Locomotive Workshop
> Australian Technology Park
> Eveleigh, NSW 1430, Australia
> Tel: +61 2 8374 5561
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> Fax: +61 2 8374 5531
> Email: Varuni.Witana@nicta.com.au
> Web: www.nicta.com.au
>
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