Stefano Salsano wrote:
>
> Marcus Brunner wrote:
> >
> > Carlos Alberto Kamienski wrote:
> > >
> > > I my opinion there should be a field in the SLS for specifying exactly the
> > > service one has in mind. It may be a well-known service identifier or a
> > > identifier that has just a peer-to-peer meaning. I cannot see a
> > > negociation process where both sides are able to understand clearly other
> > > side's idea of the service just by observing some fields in the SLS (for
> > > any service one can ever imagine!).
> >
> > You are right, this makes it much easier for negotiation. On the other
> > hand, have you well-known services in mind? The only "service" the
> > DiffServ WG (they call it PDB) is currently looking at is the Virtual
> > Leased Line (VLL). It uses the EF PDB in the network.
> >
> > But never the less, the well-known service needs to be specified with a
> > SLS. So in my opinion the well-known service identifer is just a
> > compression of the SLS for ease of negotiation.
> >
> > Marcus
>
> Dear Marcus, dear all,
>
> in a running project (AQUILA, see
> http://www-st.inf.tu-dresden.de/aquila/)
> we are defining (and implementing!) SLSs in a way which is very similar
> to the approach defined in draft-tequila-diffserv-sls-00.txt.
>
> What is interesting is that we found the need to have pre-defined
> SLSs (we called it "Network Services" but the name can be misleading):
> for ease of negotiation and implementation only a subset
> of parameters can be specified, while the others are given by default
> with reference to a small set of "well known services".
> This is in perfect agreement with your idea that a well-known service
> identifer is just a compression of the SLS for ease of negotiation.
You mean you have, pre-defined services, where only a small number of
parameters are negotiated. However, in order to announce, offer the
well-known services you have to parameterize them, before the parameter
will get a fixed/service specific value.
>
> We plan to send a contribution to this discussion with a draft
> document in a short time (one or two weeks) to present our approach.
I am glad to hear that. I await your draft.
Marcus
>
> Best regards,
> Stefano
>
> --
> *******************************************************************
> Stefano Salsano
> CoRiTeL - Consorzio di Ricerca sulle Telecomunicazioni
>
> E-mail : salsano@coritel.it URL : http://www.coritel.it
> Tel. : +39 06 20410029 Address : Via di Tor Vergata, 135
> Fax. : +39 06 20410037 00133 Roma - ITALY
> *******************************************************************
--Dr. Marcus Brunner C&C Research Laboratories NEC Europe Ltd.
E-Mail: brunner@ccrle.nec.de WWW: http://www.ccrle.nec.de/ personal home page: http://www.tik.ee.ethz.ch/~brunner
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