Re: Label type to be used

[Ashok Narayanan <ashokn@cisco.com>]

I erroneously sent out some wrong text in my previous email which can
be ignored as noise:

> Plus TDM switches now
> have to handle both SUKLM and port labels, and both Intserv and
> SONET/SDH TSpecs when in fact there was really no need for it. 

Meanwhile I have another question. We changed the label type of 
[PSC, LSC] from "lambda" to "port"; and I guess the reason for that is
that a PSC device really isn't going to know about wavelengths. If my
understanding is correct, then [TDM, LSC] should also really be a port
label. Why isn't it?

-Ashok


> If the
> signal is truly transparent then a TSpec reflecting all the slots on
> the link, and a SUKLM label reflecting STS-1, is functionally
> identical to a port label and an Intserv tspec (probably the SONET
> TSpec is a more accurate description of the link). 
> 
> Anyway, I won't really object to the change if nobody else does.
> 
> -Ashok
> 
> > 
> > Lou
> > 
> > >On Thu, Mar 18, 2004 at 09:58:23AM -0800, Kireeti Kompella wrote:
> > >> Hi,
> > >>
> > >> Arthi and Lou pointed out the following typos in the GMPLS routing doc
> > >> (draft-ietf-ccamp-gmpls-routing-09.txt) which is now in the RFC
> > >> Editor's queue:
> > >>
> > >> In section 2.4.7 is the following table defining the type of label
> > >> for various combinations of switching types:
> > >>
> > >>       [PSC, PSC] - label is carried in the "shim" header [RFC3032]
> > >>       [TDM, TDM] - label represents a TDM time slot [GMPLS-SONET-SDH]
> > >>       [LSC, LSC] - label represents a lambda
> > >>       [FSC, FSC] - label represents a port on an OXC
> > >>       [PSC, TDM] - label represents a TDM time slot [GMPLS-SONET-SDH]
> > >>       [PSC, LSC] - label represents a lambda
> > >>       [PSC, FSC] - label represents a port
> > >>       [TDM, LSC] - label represents a lambda
> > >>       [TDM, FSC] - label represents a port
> > >>       [LSC, FSC] - label represents a port
> > >>
> > >> The one at issue is [PSC, LSC]; above it says that the label
> > >> represents a lambda; and in the case of [PSC, TDM] with a fully
> > >> transparent signal, the above indicates the label represents a TDM
> > >> time slot.  The proposal is to change this to:
> > >>
> > >>       [PSC, PSC] - label is carried in the "shim" header [RFC3032]
> > >>       [TDM, TDM] - label represents a TDM time slot [GMPLS-SONET-SDH]
> > >>       [LSC, LSC] - label represents a lambda
> > >>       [FSC, FSC] - label represents a port on an OXC
> > >>       [PSC, TDM] - fully transparent signal: label represents a port
> > >>                    ("transparency" is defined in [GMPLS-SONET-SDH])
> > >>       [PSC, TDM] - non-transparent signal: label represents a TDM time
> > >>                    slot [GMPLS-SONET-SDH]
> > >>       [PSC, LSC] - label represents a port
> > >>       [PSC, FSC] - label represents a port
> > >>       [TDM, LSC] - label represents a lambda
> > >>       [TDM, FSC] - label represents a port
> > >>       [LSC, FSC] - label represents a port
> > >>
> > >> Please respond by Friday 3/26, 5pm PST with comments on:
> > >>
> > >> a) do you agree with the above change?
> > >> b) in your implementation today, what do expect the label to represent
> > >>    i) in the case of [PSC, LSC]?
> > >>    ii) in the case of [PSC, TDM] with a fully transparent signal?
> > >> c) if you implement as the draft says, would it be a hardship to change
> > >>    this?
> > >>
> > >> If we can get closure on this, I'll take up the task of modifying the
> > >> pending RFC with the ADs.
> > >>
> > >> Kireeti.
> > >> -------
> > >
> > >--
> > >
> > >
> > >--- Asok the Intern ----------------------------------------
> > >Ashok Narayanan
> > >IOS Network Protocols, Cisco Systems
> > >1414 Mass Ave, Boxborough MA 01719
> > >Ph: 978-936-1608.  Fax: 978-936-2218 (Attn: Ashok Narayanan)
> 
> -- 
> 
> 
> 
> --- Asok the Intern ----------------------------------------
> Ashok Narayanan
> IOS Network Protocols, Cisco Systems
> 1414 Mass Ave, Boxborough MA 01719
> Ph: 978-936-1608.  Fax: 978-936-2218 (Attn: Ashok Narayanan)
> 

-- 



--- Asok the Intern ----------------------------------------
Ashok Narayanan
IOS Network Protocols, Cisco Systems
1414 Mass Ave, Boxborough MA 01719
Ph: 978-936-1608.  Fax: 978-936-2218 (Attn: Ashok Narayanan)