The MPLS WG Archive

["Bharathi R" <bharathir@future.futsoft.com>]

Hi Vishwas,
If my understanding is correct, "The Various levels of PSC" means PSC-1,
PSC-2..PSC-4?
If so then in PSC-2 label stack depth is 2 and PSC-3 means label stack of
depth 3 and so on.
If so then why it is restricted to 4 levels?
Thanks & Regards,
Bharathi
 -----Original Message-----
From: 	owner-mpls@uu.net [mailto:owner-mpls@uu.net]  On Behalf Of Manral,
Vishwas
Sent:	Tuesday, 28 May 2002 5:03 PM
To:	'bharathir@future.futsoft.com'; mpls@uu.net
Cc:	gmpls-ops@mplsrc.com
Subject:	RE: GMPLS - PSC switching capability

Bharathi,

Though I do not know much about GMPLS, however the draft

http://www.ietf.org/internet-drafts/draft-ietf-ccamp-gmpls-routing-04.txt

states that
"If an interface is of type PSC-1 through PSC-4, it means that the node
receiving data over this interface can switch the received data on a
packet-by-packet basis, based on the label carried in the "shim" header
[RFC3032]. The various levels of PSC establish a hierarchy of LSPs tunneled
within LSPs."
Hope this is what you were looking for,

Thanks,
Vishwas
>  -----Original Message-----
> From: 	Bharathi R [mailto:bharathir@future.futsoft.com]
> Sent:	Tuesday, May 28, 2002 4:04 PM
> To:	mpls@UU.NET
> Cc:	gmpls-ops@mplsrc.com
> Subject:	GMPLS - PSC switching capability
>
> Hi,
> Can anyone tell me why GMPLS routing Extension mention 4 different PSC
> switching capabilities?
> What is the significance of having 4 different PSC switching capabilities?
> Thanks & Regards,
> Bharathi
>

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