Folks,
Below are the minutes from the SNMP audio call held on 5/13. We will
convene to discuss the action items on 5/20 from 11:00 - 1:00 PM EST.
Please let me know by end of day Tuesday 5/19 if you plan to call into
the bridge and need a phone number.
Thanks,
George Kajos
VideoServer
63 Third Avenue
Burlington, MA 01803
tel: (781) 505-2193
fax: (781) 505-2101
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SQ16 Q14 H.Multimedia MIB
Audio Call 5/13 Minutes
Agenda
1. Introductions - identify company, area of interest, likelihood of a
submission to the June ITU-T SG16 Q.11-14 Rapporteur's meeting in Cannes,
France
2. Discussion of the April SG16 Q.11-14 Rapporteur's meeting in Japan and
agreements identified in the Q.14 trip report (TD16, sec 6.2.3)
3. Discussion of the enclosed hierarchy document
4. Proposed changes to APC-1347 and APC-1349; discussion of all the APC
contributions
5. Organization of the H.Multimedia MIB document
6. IETF relationship
7. Planning for future meetings and division of labor
1. Attendees:
Mike Thatcher, Irene Kuffel, Dan Klenke, Cisco
Mark Baugher, B.Strahm Intel
Joon Maeng, Vtel
David Walker, Wade ?, Mitel
Orit Levin, Radvision
Chris Gindel, PakNetX
Don Dewar, George Kajos, David Reich, Irina Suconick, Santo Wiryaman,
VideoServer
2. Temporary document 16, sec 6.2.3
The Q.14 trip report was read out loud and discussed. TD-26 is a liaison
to SG4 to determine if and how to add the H.Multimedia MIBs under the
CCITT tree. It was questioned whether any published MIBs are under trees
other than {iso (1) org (3) dod (6) internet (1)} and, if so, where they
are published. The security issue was restated without discussion. It
was pointed out that the MIBs developed in this work need the ability to
be proxied for use by TMN (telecommunications management network).
3. Hierarchy document
The updated hierarchy was discussed. While it was generally agreed to,
doubt was expressed as to whether there would be any contributions to the
media codecs and T.120 areas before September 1998.
4. How to reduce overlap with Gatekeeper and RAS MIBs
Mike Thatcher discussed that he split out the H.323 textual conventions
into a separate document so all other modules can import it. Irina
Suconick and Mike Thatcher discussed their updates to APCs 1347 and APC
1349. Principle decisions to reduce the overlap included 1) the
gatekeeper MIB would rely on the registration and admissions table in RAS
MIB. Most Gatekeeper tables except the Zone and Segment moved to RAS MIB
The Zone table indexed by unsigned integer instead of by name to keep OID
smaller. Gatekeepers will have information on their own zone(s) and
zones of other gatekeepers that a gatekeeper knows about.
There was a great deal of discussion about the indexing scheme for the
admission table. One concern was that 5 indices were too large to fit in
as a 128 byte OID. Another was that without the Revision 2 CallID, the
indices do not provide uniqueness. The use of CallID was debated because
it is unavailable to version 1 gatekeepers. Additional input was that
there should be index correlation between the Admission Table and the
CallSignalling MIB Call Table. However, there is no requirement that a
direct call model gatekeeper support H.225 Q.931 making this somewhat
difficult. On the topic of correlation between the Zone Table and
Registration table, Mike thought that an indirect correlation existed.
Others disagreed. Another concern was that most tables need to have
read/write access. The SNMP V2 rowStatus technique was pointed out as a
mechanism to allow administrative static entries into registration and
other tables.
4a MIB counter32 discussion
A more general comment was that there are too many counters. George
asked that she
specify which counters need to be removed. The response was that all
global counters should be removed as it is no longer standard practice.
George strongly disagreed and pointed out that among the reasons for the
MIB effort is fault isolation and performance measurement. Most of the
SNMP V2 RFC MIBs have *counter32* for this reason. Resolution of this
issue will be done by discussing each counter and justify its existence
or removal by group consensus.
5. Organization of the documents
George wants H.Multimedia management document to describe goals,
conventions, relation to other work and make the MIBs individual annexes.
The SG4 liaison requests input on this issue. The structure of the
H.Multimedia MIB document will be a topic at the June SG16 meeting. In
particular it was thought that a proposal should be generated and
presented to Mr. Bigi.
6. IETF relationship
The group expressed a preference for conducting the work in the ITU
rather than the IETF. However, the overall study group agreed to have
the work examined by the IETF to determine if there was any interest.
This will still be the plan of record. If reaffirmed in the June ITU-T
SG16 Q.11-Q14 meeting, then we will ask for IETF input during the August
IETF meeting. It was reaffirmed that the work would use the SMI from SNMP
V2.
7. Next Meeting - Audio conference
Wednesday, May 20, at 11:00-1:00 PM Eastern Standard Time. Send email to
gkajos(a)videoserver.com for inclusion.
Action Items
1. George Kajos - Publish meeting minutes (this report) and schedule next
conference.
2. George Kajos - Confer with ISO network management experts regarding
placement of H.Multimedia MIB. Check with Mr. Thom on status of liaison
to SG4 discussing topic.
3. Group - Research us of Global counters as they relate to usefulness in
fault isolation and performance monitoring in network management
applications.
4. Group - Try to achieve resolution on Admission table indices.
5. Group - Resolve correlation of indices between Admission and
CallSignalling Tables.
6. Group - Resolve correlation of indices between Registration and Zone
Tables.
7. Michael Thatcher - Send revised APC-1349 and textual conventions MIB
to mailing list.
8. Irina Suconick - update APC-1346, APC-1347, and APC-1348 to use
textual conventions described in document sent to mailing list by Michael
Thatcher.
9. Joon Maeng - Reflect meeting minutes to Q.11 mailing list and request
contributions for H.320 MIBs.
