Re: VLAN label range requirement

["Adrian Farrel" <adrian@olddog.co.uk>]

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