RE: VLAN label range requirement

["Ong, Lyndon" <Lyong@Ciena.com>]

That was my interpretation also, not sure if that
came through on the slides.

Lyndon 

-----Original Message-----
From: owner-ccamp@ops.ietf.org [mailto:owner-ccamp@ops.ietf.org] On
Behalf Of Stephen Shew
Sent: Tuesday, July 11, 2006 8:09 PM
To: Adrian Farrel; ccamp@ops.ietf.org
Subject: RE: VLAN label range requirement

You're welcome.

The response from CCAMP on this question is very thorough, and I
certainly appreciate the thought that went into it.  My interpretation
of the response is that that CCAMP encourages the OIF to design an
encoding for the VLAN identifiers, and communicate it back to CCAMP.

Stephen 

-----Original Message-----
From: Adrian Farrel [mailto:adrian@olddog.co.uk]
Sent: July 11, 2006 18:42
To: Shew, Stephen (CAR:Q840); ccamp@ops.ietf.org
Subject: Re: VLAN label range requirement

Thanks Stephen.

What is your opinion of the response to this question that CCAMP
supplied in its return communication to the OIF?

Adrian
----- Original Message -----
From: "Stephen Shew" <sdshew@nortel.com>
To: <ccamp@ops.ietf.org>
Sent: Tuesday, July 11, 2006 4:44 PM
Subject: VLAN label range requirement


In yesterday's meeting, there was a request for more information on the
VLAN label range requirement.  From the original OIF liaison, the
description was:
"We are investigating label formats to represent a list or range of VLAN
identifiers, as used in MEF.11 bundling. In the case where a large
number of non-consecutive VLAN identifiers is used for the same
connection, we would like to keep the label to a reasonable size."

The requirement to send a range of VLAN identifiers in signalling arises
in the bundling feature in Ethernet services as specified in Metro
Ethernet Forum (MEF) and ITU-T SG15 documents.  In the MEF, the MEF.11
spec "User Network Interface (UNI) Requirements and Framework" there is
a UNI service attribute called "bundling" that is described as "A UNI
attribute in which more than one CE-VLAN ID is associated with an EVC."
It is more fully described in MEF.10 "Ethernet Services Attributes Phase
1".  Both technical specs may be obtained free at:
http://www.metroethernetforum.org/TechSpec.htm

Equivalent ITU-T Recs. are G.8011, G8011.1, and G.8011.2.  These are
available to ITU-T members, or under a "3 free" capability on the ITU-T
website.

Of interest is the MEF Ethernet Link Management Interface (E-LMI)
defined in MEF.16 that has an encoding for passing VLAN ranges between
the UNI client and network.  This in a structure called the "CE-VLAN
ID/EVC Map information element".

I hope this provides more clarity to the VLAN label range issue.

Stephen Shew
Metro Ethernet Networks
Nortel
sdshew@nortel.com
Telephone: +1 613 763 2462 / ESN 393 2462