The MPLS WG Archive

[Riad Hartani <riad@caspiannetworks.com>]

On this subject, the OIF UNI 1.0 specification (submitted for last call)
describes, among other things, how to use SONET Line and/or Section DCC
overhead bytes to transport various IP control plane messages (called IP
Control Channel -IPCC-). For discovery of information required by the IP
control plane, both DCC or J0 bytes may be used in the actual proposal.

For the IP control plane, the proposal requires IP packets to be
encapsulated in PPP over HDLC-like framing with bit stuffing format. The
spec also describes various aspects related to the selection and maintenance
of IPCC parameters, as well as other ways of carrying IP control information
in Sonet/WDM environments.

Hope this helps,

Riad

> -----Original Message-----
> From: Alex Zinin [mailto:azinin@cisco.com]
> Sent: Sunday, December 17, 2000 9:46 AM
> To: Tony Przygienda
> Cc: tli@procket.com; echang@pocketmail.com; 
> isis-wg@spider.juniper.net;
> skatukam@cisco.com; mpls@UU.NET
> Subject: Re: [Isis-wg] Question on DCC Architecture
> 
> 
> 
> Tony,
> 
> >>  A number of companies working in the SONET area already use or are
> >>  planning to use DCC for IP control plane [I put MPLS list back ;),
> >>  since this question is related to GMPLS and OTN-related work].
> >> 
> >>  There are two types of IP encapsulation on DCC that I know of:
> >>  LAP-D and PPP/HDLC. We use the second one in our SONET products.
> >> 
> >>  I think writing up an IETF document describing this would 
> make sense.
> 
> > First, this smells much like ISO thing to do so we'd need 
> an agreement/liason
> > first from their side. That is obviously only worth 
> pursuiting if we have
> > authors commiting to provide the cycles first.
> 
> Hmmm... why do you think specification of *IP* encapsulation 
> over SONET DCC
> using "PPP over HDLC-like framing" is something ISO should do?
> 
> > Second, which workgroup ? One of the MPLS offsprings such 
> as GSMP ;-) ? What about 
> > a new one, IPSO (IP over SOnet) ? I'm joking but wouldn't 
> be surprised
> > if the joke find takers ;-) ? 
> 
> Definitely not me ;)
> 
> I think some kind of individual submission should be ok. I guess
> the Internet Area is the one that logically hosts it.
> 
> Thanks,
> 
> Alex.
> 
> 
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