Subject: Re: [Diffserv] Some comments on <draft-ietf-diffserv-efresolve-00.txt>

From: Dan Grossman <[email-masked]>
Date: Wed, 07 Mar 2001 17:08:38 -0500

More to the point, this may be necessary to support, say, Virtual Wire with 
heterogeneous rates.

> The architecture certainly allows this. Whether you can do it in
> reality depends on the router implementation.
> 
>   Brian
> 
> "Ahmad Delalat (ERA)" wrote:
> > 
> > Brian,
> > 
> > What I mean is whether it is possible to have multiple instances of a
> > given PHB in a single node at the same time. For example:
> >         DSCP1 ------> EF1 (with R1 and E_a1)
> >         DSCP2 ------> EF2 (with R2 and E_a2)
> > in one and the same node. Otherwise I must have misunderstood the notion
> > of PDB. Isn't it possible to have different PDBs at the same time each of
> > which requires its own instance of a given PHB (e.g., with different Rs)?
> > 
> > /Ahmad
> > 
> > -----Original Message-----
> > From: Brian E Carpenter [mailto:[email-masked]]
> > Sent: Monday, February 26, 2001 10:40 PM
> > To: Ahmad Delalat (ERA)
> > Cc: [email-masked]'
> > Subject: Re: [Diffserv] Some comments on
> > <draft-ietf-diffserv-efresolve-00.txt>
> > 
> > Since DSCPs are mappable rather than fixed, nothing in the diffserv
> > architecture stops you having multiple instances of a given PHB in a
> > single domain. In fact you are really asking the wrong question -
> > why did we recommend more than one group of DSCPs for AF?
> > 
> >   Brian
> > 
> > "Ahmad Delalat (ERA)" wrote:
> > >
> > > Brian,
> > >
> > > Is it possible and if so is it relevant to have multiple EF PHBs
> > > for the same output interface by configuring different R and/or
> > > specifying different E_a? An example usage could be implementing
> > >  of different PDBs. If it is relevant why suggesting just one DSCP?
> > >
> > > /Ahmad Delalat
> > >
> > > -----Original Message-----
> > > From: Brian E Carpenter [mailto:[email-masked]]
> > > Sent: Thursday, February 22, 2001 4:33 PM
> > > To: Ahmad Delalat (ERA)
> > > Cc: [email-masked]'
> > > Subject: Re: [Diffserv] Some comments on
> > > <draft-ietf-diffserv-efresolve-00.txt>
> > >
> > > Ahmad,
> > >
> > > It doesn't matter. The WG chose to prefer the approach
> > > in draft-ietf-diffserv-rfc2598bis-00.txt
> > >
> > >   Brian Carpenter
> > >   diffserv co-chair
> > >
> > > "Ahmad Delalat (ERA)" wrote:
> > > >
> > > > The definition provides a flexible and scalable PHB independent of aggregate's volume. However, being characterized by R ans S means that it must be possible to have multiple EF PHBs in the same DS domain for example to implement different PDBs. Shouldn't EF PHB in such a case be a PHB group?
> > > >
> > > > Best regards
> > > >
> > > > /Ahmad Delalat
> 
> 
> 
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