Minutes of Washington Meeting
Bob Stewart <rlstewart@eng.xyplex.com> Thu, 17 December 1992 19:15 UTC
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From: Bob Stewart <rlstewart@eng.xyplex.com>
To: chassismib@cs.utk.edu
Subject: Minutes of Washington Meeting
Sorry I took so long getting the minutes out. {Insert mile long list of excuses here.} These have to be submitted to Megan Monday, so you have until then to repair my transcription of my notes. Bob ------------------------------------------------------- Chassis MIB Working Group Minutes Bob Stewart, Xyplex, rlstewart@eng.xyplex.com The Chassis MIB Working Group held its third meeting at the IETF meeting in Washington D.C., at 1:30 PM on Tuesday, 17 November 1992. For this meeting, Jeff Case presided and Bob Stewart recorded. Unlike last time, the group had done considerable work using the mailing list, but progress broke down due to problems with the overall model for a chassis and how to describe it in a MIB. The following meeting agenda was presented at the meeting. ----------------------------------------------------------- Chassis MIB WG -- November 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 / Administrative details . Chassis entity table issues - chassisEntityArgument - chassisEntityAdminStatus - expository text . Definition of a chassis . Multiple (redundant) views of the chassis . Identify new issues . Power supply . Environment . Future plans ----------------------------------------------------------- We reviewed the agenda and made the following changes: . We added "host as a chassis" to end of agenda, as hosts have slots and Host MIB isn't addressing that. Also added "hosts in a chassis." . We added implementation model and architectural issues to entity table issues. . We moved "definition of a chassis" higher. . We added conformance issues. The following points were made regarding a suggestion to limit the model to a physical chassis: . That is a charter violation. . We can use a physical chassis as the primary example. . There are products that are closely-coupled boxes. . Seven or so companies have products with a proprietary chassis MIB. . We need to move forward on the specific problem with consideration for the general problem. The following points were made regarding the model: . A chassis is an "enclosure" with "slots." . A "module" may occupy one or more slots. . "Entities" perform one or multiple functions. . How do we handle a function that is part of the chassis rather than a slot? It could be considered a slot. There are kinds of slots: fan, power supply, etc. One implementation contains a column for type of slot and one level of subcomponents of modules. Another implementation has segments indexed by type. Type concept could be extended to slots, but what if the uses overlap? Two levels for component and subcomponent may not be enough, but may be best handled with recursive application of chassis model. . The basic model is physical modules, functional entities, and segments with a many-to-many map, including null segments. . We lack a shared overall model, which leads to problems with objects. . One implementation has classes of slots, such as power supply, fan, and module. Modular slots make up entities one to one, which is not good enough for a general model. . The type and location approach was suggested for physical, functional, and segment tables. . This constitutes types for holes and types for pegs. . Functional types are peg types, not hole types. . Type needs to cover multiple properties, implying a bit string rather than an object identifier (OID). . We need a physical subpart table to break physical parts into separate pieces. . The original model handles combining parts into a logical entity. . We are trying to do too much and should stick with the current model. . We're close to a solution. . Type added to physical and segment table maps nicely to a physical label. . We've shown that the model is not clearly described by the text. We must avoid the problem of the MIB-II ifTable. . Happiness with the model varies based on belief in understanding. . Idea of a type seems useful. The following points were made regarding the the entity table: . An issue is control versus monitoring. . An issue is what chassisEntityArgument is for: way to control in detail, too implementation specific, must describe it in detail or remove it. . We removed chassisEntityArgument. . We discussed chassisEntityAdminStatus. An implementation allows reset. Is it for a physical or logical entity? It duplicates specific MIB objects. The states are not clear. We should keep it and apply it to the physical module. What if such application is not possible? If not possible, say no. . We kept chassisEntityAdminStatus but it needs work. The future plan is: . Jeff will prepare an Internet Draft. . We will discuss the issues on the mailing list. . The co-chairs will be more active on the mailing list. Respectfully submitted, Bob Stewart
- Minutes of Washington Meeting Bob Stewart