Subject: Re: [Diffserv] clarifications on new terms (draft-ietf-diffserv-new-terms-04)

From: Tom Scott <[email-masked]>
Date: Thu, 03 May 2001 21:37:36 -0400

Does your reference to automata mean what I think it does? See
http://www.eecs.umich.edu/gasm for more. Is anyone else doing ASM/SDL
analysis of diffserv? If so, could you post your results?

-------- Original Message --------
Subject: Re: [Diffserv] clarifications on new terms  
(draft-ietf-diffserv-new-terms-04)
Date: Thu, 03 May 2001 17:00:18 -0500
From: Brian E Carpenter <[email-masked]>
Organization: IBM
To: Nabil Seddigh <[email-masked]>
CC: Sergio Andreozzi <[email-masked]>,"DiffServ@ietf. org"
<[email-masked]>
References: <[email-masked]>
<[email-masked]>

Exactly. You have 4 independent automata, each following its own rules. 
The fact that the 4 automata happen to be built the same way is
incidental.

However, we must not forget that in the real world they share at least
one
common resource, the output line.

    Brian

Nabil Seddigh wrote:
> 
> > After that you create four "AF PHB instances" of this "AF PHB group type"
> > and you assign codepoints to each group. Each AF PHB group implementation
> > can have different parameters for the mechanisms (e.g. for RED queues). Each
> > packet in one of these instances MUST be forwarded independently from
> > packets in another instance.
> >
> > My question is: what does "MUST be forwarded independently" mean?
> >
> 
> My recollection is that such a line was put in the AF RFC
> to reflect the fact that there is no REQUIRED priority
> amongst the AF classes. Each class may be independently
> allocated a portion of the link bandwidth.
> 
> ---
> Best,
> Nabil Seddigh
> [email-masked]

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