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- This is only a rough draft - Megan 04/16/92
-
- The following meeting agenda was presented on the Chassis MIB
- working group mailing list before the meeting.
-
- -----------------------------------------------------------
-
- Chassis MIB WG -- March 17, 1992
-
- Bob Stewart
- rlstewart@eng.xyplex.com
-
- Jeff Case
- case@cs.utk.edu
-
- Mailing List: chassismib@cs.utk.edu
- chassismib-request@cs.utk.edu to add/delete/modify
-
- Welcome
-
- Introductions
-
- Review Charter
-
- Chassis Information Model
-
- Define Scope of Work
-
- Review Contributed MIBs
-
- Keith McCloghrie, Hughes LAN Systems (kzm@hls.com) and
- Donna McMaster, Synoptics (mcmaster@synoptics.com)
-
- Manu Kaycee, Cabletron (kaycee@ctron.com)
-
- Plan For Producing Baseline Documents
-
- Next Meeting Date and Location
-
- -----------------------------------------------------------
-
- We discussed the charter, concentrating on the three work areas:
- mapping logical functions to physical devices, power supplies, and
- aggregation. This discussion was limited to the meaning of the
- charter with technical discussion deferred to later in the
- meeting.
-
- The major points regarding the charter for logical to physical
- mapping (the Chassis MIB, proper) were:
-
- . This is a "meta-MIB", pointing to other MIBs.
- . Multiple instances of the same device may have "virtual
- agents."
- . Any system in any slot may implement the Chassis MIB.
- . One agent may point all slots to the same agent.
-
- The major points regarding the charter for a power supply MIB
- were:
-
- . "Power supply" may include environment, such as fans and
- temperature.
- . "Power supply" most likely does not include items such as
- interrupt vectors and memory jumpers.
- . Environment perhaps should be a separate MIB.
- . Discussion should stay focussed on a "network" chassis, not
- general VME, Multibus, PC bus or such.
-
- Little was said at this point regarding aggregation.
-
- Regarding the general constraints, the major points were:
-
- . This is NOT the place for a VME MIB.
- . Large companies, such as IBM, are not considered as
- standards bodies.
- . For the sake of robustness, reliance on third parties is to
- be avoided.
-
- The charter was accepted as written.
-
- The group discussed the scope of work for a Power Supply MIB. The
- major points were:
-
- . Many are interested having such a MIB, few are interested
- in working on it.
- . A document is not useful if it does not result in
- widespread implementations.
- . A poll of what current implementations provide obtained:
- state, backup, voltage, current, etcetera ad nauseum.
- . A Power Supply MIB might point to an Environment MIB.
- . A Power Supply MIB is applicable outside a chassis, but a
- power supply in a chassis is more important than in a
- single system.
- . What is available across implementations resulted in a
- consensus for on/off status and an average of 4/5 variables
- from about 25 companies.
- . Who is actually using this information resulted in
- responses from Hughes, Digital, Synoptics, Chipcom,
- Fibronics, NCR, and several others.
- . Everyone who has such variables is to send relevant MIB
- segments to Bob Stewart for compilation, including
- temperature, fans, and such.
-
- The group discussed the scope of work for aggregate information.
- The major points were:
-
- . Widespread confusion over what this topic means concluded
- that this is to be an assessment of "how is it (a group of
- entities) working".
- . The answer to "Why with the Chassis MIB?" was because a
- chassis creates a well-identified group.
- . The group agreed the definition is still to vague, what
- constitutes a group?
- . Is there anything like this now? There is some CMIP work
- which will be one of our proposals, along with two others.
- . Examples of aggregation are total errors, total packets,
- and such.
- . Jeff wants to do this.
- . Some specific examples are traffic in and out of a regional
- network, or the sum of ifInOctets for a group.
- . Might this solve the problem of SNMP management for non-
- SNMP devices not necessarily in a chassis? No.
- . This is an interesting next step in network management, but
- may be beyond the reasonable scope of this working group.
- . Synoptics has a MIB for the health of a device, set by
- rules.
- . The RMON MIB totals things, but is LAN-bound.
- . This looks like artificial intelligence.
- . In favor of this work, but shouldn't be called "chassis."
- . Does the rule of not defining objects deducible from others
- preclude this? No, that was a rule for initial definition
- of MIB I.
- . Conclusion was that this is useful, important work, many
- want to work on it and want the product of that work.
-
- The working group concluded that the Chassis MIB is of primary
- importance, a Power Supply MIB is worth working on if there is
- enough common ground, and an Aggregation MIB may combine in some
- ways with the Chassis MIB or may need to be separated so as not to
- adversely effect delivery of a Chassis MIB, which is the primary
- deliverable.
-
- The working group then turned to presentations of possible Chassis
- MIBs.
-
- Keith McCloghrie presented a proposed Chassis MIB that he and
- Donna McMaster prepared for the Multiport Repeater Working Group.
- [The McChassis MIB?] The major points presented were:
-
- . Purpose is to manage a box with multiple modules. The box
- comprises physical modules (slots), logical devices
- (repeaters, bridges, etc.), backplane "wires" (Ethernet,
- Token Ring, FDDI, etc.), and power supply.
- . Physical devices are indexed by slot number. They have an
- object identifier for board type (including empty and
- unknown), and a time of last insertion or removal.
- . Logical devices are integer indexed. They have a function
- (a sum of values such as repeater, bridge, or terminal
- server), the device's sysObjectId, and, for SNMP access, an
- SNMP party object identifier or a community string and IP
- address. Issues here included relationship to SMUX and UPD
- ports, non-IP addressing, and multiple communities for get
- and set.
- . Backplane wires are integer indexed and have an object
- identifier to indicate type.
- . A configuration table has an entry for each relation with a
- slot number, a logical device index, and a backplane wire
- index, meaning that (part of) the logical device is in the
- slot and connected to the indicated backplane wire.
- Several such entries may make up a single logical device.
- . Concepts in the document but not on the original slides
- include a status object and a null index to indicate lack
- of relevance, such as no backplane wire for a power supply.
- . Additional issues include definition of "chassis",
- generalization of "slot" to include "physical device," more
- information such as ifIndex or ifOperStatus, inclusion of
- external "wires," what is a proper device (such as a host),
- a directory of devices beyond a chassis, and the number of
- tables (done to be concise).
-
- Manu Kaycee presented a Chassis MIB being implemented as a private
- extension by Cabletron. The major points presented were:
-
- . Requirements are to support hub-based products, many-to-
- many associations, logical and physical representations,
- physical partitioning of components and tables, MIB
- discovery, multiple component instances, virtual chassis.
- . MIB is very similar to Keith and Donna's.
- . Lacks map from logical device to backplane wires.
- . Adds chassis type for agent-supporting device.
- . Backplane includes VME or such.
- . Has a slot count.
- . Component table includes adminStatus (needs operStatus),
- string to pass with initialize command, name, software
- version, access policy.
- . Slot table indexed by slot and component to give map. It
- includes slot class for restricted slots, a unique module
- ID, and is empty if "chassis" is slotless.
- . Includes a (controversial) MIB group table, indexed by
- slot, component, and group that can distribute the MIB-II
- ifTable across slots and could be VERY big.
- . This is currently being implemented, Cabletron will share
- experience if that is helpful.
-
- Jeff called for additional proposals. Two were offered to be
- submitted by mid April. First draft MIB to appear as soon as
- possible after final call for proposals on mailing list.
-
- The working group decided not to have an interim meeting,
- especially not at Interop. Discussion will be via email.
-
- Respectfully submitted,
-
- Bob Stewart
-
-