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- Editor's note: Minutes received 4/12/93. These minutes have not been edited
- and the attendee list has not been appended.
-
- Reported by Kaj Tesink
-
- ATM MIB BOF MEETING NOTES
-
- On April 1, 1993, Kaj Tesink/Bellcore convened
- an ATM MIB BOF. The purpose of the BOF was to
- determine if there was sufficient interest
- to create a WG to develop managed objects for ATM.
-
- The BOF agenda included four presentations,
- plus a discussion period:
-
- 1) Overview, Proposed Charter (Kaj Tesink)
- 2) ATM MIB Strawperson Proposal (Masuma Ahmed)
- 3) ATM ILMI (Keith McCloghrie)
- 4) SONET MIB (Kaj Tesink)
-
- Overview - Kaj Tesink
- -------------------------
-
- Following unanimous agreement that a WG is necessary
- to develop managed objects related to ATM, Kaj
- identified the following "terms of
- reference" as the basis for the proposed
- charter of the ATM MIB work effort:
-
- + Priority on ATM PVCs
- + Keep the MIB small
- + Priority is creation of a SNMPv1 managed objects,
- support of SNMPv2 may be a future effort
- + Difference between interface and end-to-end
- view of NM information for ATM
-
- Kaj discussed the relationship of the proposed
- ATM MIB with physical layer MIBs. He suggested that
- the WG include work on the SONET MIB which was
- posted by Tracy Cox. The Trunk MIB WG which had
- developed MIBs for DS1/E1 and DS3/E3 no longer exists.
- Ayal Opher cautioned against assuming that the
- SONET MIB is "done". Since there are more
- implementations of SONET equipment, folks may
- pay more attention and have more comments on
- the proposed SONET MIB module.
-
- There was discussion on the different perspectives
- on ATM-related network management information:
-
- + Local DTE view of ATM-based communication over the
- local interface
- + Network view of the local interface
- + End-to-end view of the communication path
- + ATM Switch Management - both private and public
- + ATM-based Service information - both private and public
-
-
- These different perspectives drive identification of
- different sets of managed objects.
-
- Based on this discussion, a charter was agreed upon,
- that directs the proposed WG to undertake work on
- ATM and SONET management (attached).
-
- ATM MIB Proposal - Masuma Ahmed
- -------------------------------
-
- Masuma gave an overview of a Bellcore strawperson proposal
- for an ATM MIB. See the copy of the viewgraphs for a detailed
- list of proposed management information. The strawperson MIB
- is based on the ILMI, and includes configuration information
- about the ATM interface, ATM layer statistics, but (unlike
- the ILMI) also VPL/VCL level performance information. Virtual
- Channel Links are the interfaces between two adjacent ATM
- devices. A Virtual Channel Connection is the set of VCLs used
- end-point to end-point. A VCL is identified by a Virtual
- Channel Identifier (VCI). Similarly, a Virtual Path
- Connection consists of VPLs, identified by VPIs.
-
- Issues identified during the discussion included:
-
- + Relation to the existing ILMI MIB (see Keith's talk)
- + The need for end-to-end PVC configuration information
- + Modelling of ATM in relation to MIB II interfaces table
- + Need to keep the MIB small
- + Need to coordinate modelling of PVCs with FR MIB effort
- + Need for AAL performance statistics
- + Need for VPC/VCC level performance statistics
-
-
- ATM Forum ILMI - Keith McCloghrie
- ---------------------------------
-
- Keith gave a presentation on the ATM Forum's Interim Local
- Management Interface ILMI, stressing
- that even though the ILMI uses SNMP packet formats, the
- purpose of the ILMI is not network management, but rather
- "interface management". However, since the management
- information needed for interface management is a subset of
- the information needed for network management, the ILMI's MIB
- should be appropriate for use by network management as
- well as for interface management.
-
- The ATM Forum's ILMI MIB was designed to be symmetric --
- that is, to have the same MIB on each side of the interface.
- It currently contains read-only objects. The ILMI MIB
- contains information on the physical port (e.g.,operStatus),
- ATM Layer, ATM Cell, and VPC/VCCs. There are no VCL or VPL
- level statistics in the ILMI.
-
- Keith recommended that the proposed IETF Working Group use
- the ILMI MIB as a base for the development of IETF ATM
- MIB(s). The management of the local interface should use a
- common MIB module/table/group.
-
-
- SONET MIB - Kaj Tesink
- ----------------------
-
- Kaj gave a short presentation of the SONET MIB. The SONET MIB
- has been posted as Internet-Draft for a long time. It is
- consistent with other trunk MIBs. A minor change may be
- needed on table indexing. Interested people are encouraged to
- review this MIB.
-
- Internet-Draft:
-
- "Definitions of Managed Objects for the SONET Interface
- Type", Jan.1993, Tracy A. Cox, Kaj Tesink,
- <draft-ietf-cox-sonetmib-01.txt>.
-
-
- Conclusions of the Working Group
- -------------------------------
-
- 1) There is interest in forming a Working Group to develop
- standard managed objects for ATM and SONET.
-
- Deirdre Kostick suggested to call it the AToMMIB WG, with the
- "o" signifying SONET, and the "AToM as a reminder to keep
- MIBs small(!).
-
- 2) It is likely that there will be multiple MIB modules for
- ATM developed to support the different management
- perspectives identified during the BOF.
-
- 3) The MIB module(s) for management for the local interface
- should build on the ATM Forum ILMI MIB.
-
-
-
-
-
-
-
- Charter proposed AToM MIB WG (atommib)
- --------------------------------------
-
- Chair(s):
- Kaj Tesink <kaj@cc.bellcore.com>
-
- Network Management Area Director(s)
- Marshall Rose <mrose@dbc.mtview.ca.us>
-
- NM-Directorate Consultant:
- Keith McCloghrie <kzm@hls.com>
-
- Mailing Lists:
- General Discussion:atommib@thumper.bellcore.com
- To Subscribe: atommib-request@thumper.bellcore.com
- Archive: thumper.bellcore.com:pub/tob/atommib
-
- Description of Working Group:
-
- The AToM MIB Working Group is chartered to define sets of managed
- objects which will be useful in the management of ATM and SONET
- equipment, interfaces, networks, and/or services that conform
- to the relevant ATM and SONET specifications. The initial sets
- defined will be:
-
- - an interface-specific MIB for ATM interfaces, which is aligned with
- the managed objects for interface layering being defined by the
- Interfaces MIB WG. The working group should consider the ATM
- Forum's ILMI MIB for its suitability in this respect, plus any
- extensions necessary to instrument the layers between the ATM
- layer and the IP layer (e.g., AAL5). The latter should be
- take into account the work of the IP-over-ATM
- working-group (e.g., the "Multi-Protocol over AAL5"
- specification).
-
- - managed objects for the monitoring and control of ATM PVCs and
- SVCs, both in ATM end-points and in ATM switches or networks.
- (objects for ATM SVCs will be considered after completion of the
- work on ATM PVCs).
-
- - managed objects that instrument devices with SONET interfaces
- that conform with the relevant SONET specifications. This work
- should closely align to other trunk MIBs (DS1/E1 MIB, DS3/E3 MIB).
- The working group should consider the existing Internet-Draft SONET
- MIB for its suitability in this respect.
-
- The objects defined by the working group will be consistent with
- the SNMP framework.
-
- Goals and Milestones:
-
- May 93 Begin developing internet-drafts for discussion.
-
- Oct 93 Post revised internet-drafts for discussion.
-
- Dec 93 Submit internet-drafts to IESG for standards track evaluation.
-
-