datatracker.ietf.org
Sign in
Version 5.3.0, 2014-04-12
Report a bug

Liaison Statement: ASON lexicography

Submission Date: 2005-11-25
From: ITU-T SG 15 (Greg Jones)
To: IETF CCAMP WG (kireeti@juniper.net)
Cc:sob@harvard.edu
Response Contact: tsbsg15@itu.int
Technical Contact: hklam@lucent.com
Purpose: For comment
Deadline: 2006-01-27 Action Taken
Attachments: ASON lexicography
Body:
Q.12/15 thanks the CCAMP working group for the liaison of the
Internet-Draft, we look forward to continuing the dialog on the
development of this document.  In response to the questions that you
raised:
The experts of Q.12/15 reviewed the current version of the draft to
ensure that the ASON description of the GMPLS terms are accurate.  We
used the informal definitions of the GMPLS terms provided in the draft,
supplemented by some clarifications provided by Mr. Adrian Farrel at
the meeting, as the basis for our review.  We have the following
suggestions to resolve the points that were raised in the liaison:
Item 1:
CCAMP proposes the following text:
"ITU-T [should be ASON] terms for resource:
	Connection point (cp) in the context of link discovery and resource
management (allocation, binding into cross-connects, etc.);
	Link connection or trail termination in the context of  routing,
path computation and signaling."
We suggest the following revision to the text:
"ASON terms for resource:
	In the context of link discovery and resource management
(allocation,  binding into cross-connects, etc.) a GMPLS resource is
one end of a link connection,
	In the context of routing, path computation and signaling, a GMPLS
resource is a link connection or trail termination." 

Item 2a:
Note that ASON does use the concept of a link end in the form of a
subnetwork point pool (SNPP).
CCAMP proposes the following text:
"In ASON, a GMPLS unidirectional data link end is a collection of
connection points from the same client layer that are supported by a
single trail termination (access point)."
We suggest the following addition to clarify the relationship between
ASON SNPP and GMPLS data link end:
"A GMPLS unidirectional data link end is a collection of connection
points from the same client layer that are supported by a single trail
termination (access point).  This is a constrained form of an SNPP."

Item 2b:
The relationship between ASON links and their supporting server
trail(s) was discussed with Mr. Adrian Farrel to clarify the ASON
model.

Item 3:
After discussing CCAMP’s concern we suggest the following modified
text that captures the notion that the interface is between a server
layer trail and a client layer subnetwork without constraining the
server layer to be a physical layer.
"A GMPLS interface is the set of trail termination and adaptation
functions between one or more server layer trails and a specific client
layer subnetwork (which commonly is a matrix in a network element)."