This Working Group will produce a document describing MIB objects for
use in managing Ethernet-like hubs. A hub is defined as a multiport
repeater that conforms to Section 9, ``Repeater Unit for 10 Mb/s
Baseband Networks'' in the IEEE 802.3/ISO 8802-3 CSMA/CD standard (2nd
edition, Sept. 1990). These Hub MIB objects may be used to manage
non-standard repeater-like devices, but defining objects to describe
vendor-specific properties of non-standard repeater-like devices are
outside the scope of this Working Group. The MIB object definitions
produced will be for use by SNMP and will be consistent with other SNMP
objects, conventions, and definitions.
In order to minimize the instrumentation burden on managed agents, the
MIB definitions produced by the Working Group will, wherever feasible,
be semantically consistent with the managed objects defined in the IEEE
draft standard P802.3K, ``Layer Management for Hub Devices.'' The
Working Group will base its work on the draft that is the output of the
July 1991 IEEE 802 plenary meeting. The Working Group will take
special cognizance of Appendix B of that specification that sketches a
possible realization of the relevant managed objects in the SNMP
idiom.
Consistent with the IETF policy regarding the treatment of MIB
definitions produced by other standards bodies, the Working Group may
choose to consider only a subset of those objects in the IEEE
specification and is under no obligation to consider (even for
``Optional'' status) all objects defined in the IEEE specification.
Moreover, when justified by special operational needs of the community,
the Working Group may choose to define additional MIB objects that are
not present in the IEEE specification.
Although the definitions produced by the Working Group should be
architecturally consistent with MIB-II and related MIBs wherever
possible, the Charter of the Working Group does not extend to
perturbing the conceptual models implicit in MIB-II or related MIBs in
order to accommodate 802.3 Hubs. In particular, to the extent that the
notion of a ``port'' in an 802.3 Hub is not consistent with the notion
of a network ``interface'' as articulated in MIB-II, it shall be
modelled independently by objects defined in the Working Group.
Because the structure of 802.3 Hub implementations varies widely, the
Working Group shall take special care that its definitions reflect a
generic and consistent architectural model of Hub management rather
than the structure of particular Hub implementations.
The IEEE Hub Management draft allows an implementor to separate the ports in a hub into groups, if desired (i.e., a vendor might choose to represent field-replaceable unites as groups of ports so that the port numbering would match a modular hardware implementation.) Because the Working Group Charter
does not extend to consideration of fault-tolerant, highly-available systems
in general, its treatment of these groups of ports in an 802.3 Hub (if any)
shall be specific to Hub management and without impact upon other portions of
the MIB.
The Working Group is further chartered at its discretion to define an
SNMP MIB for management of IEEE 802.3 Medium Access Units (MAUs). An
802.3 Medium Attachment Unit (MAU) attaches a repeater port or
Ethernet-like interface to the local network medium. The scope of this
work may include several types of MAU units: 10BASE5 (thick coax),
10BASE2 (thin coax), 10BASE-T (twisted pair), FOIRL and 10BASE-F (fiber
optic). Managed objects defined as part of the MAU MIB task may, for
example, represent such information as MAU type, link status, and
Apr 92 Nov 92 <draft-ietf-mhsds-822dir-02.txt, .ps>
Use of the Directory to support routing for RFC 822 and related
protocols
Apr 92 Nov 92 <draft-ietf-mhsds-mhsprofile-02.txt, .ps>
A simple profile for MHS use of Directory
Apr 92 Nov 92 <draft-ietf-mhsds-subtrees-02.txt, .ps>
Representing Tables and Subtrees in the Directory
Apr 92 Nov 92 <draft-ietf-mhsds-infotree-02.txt, .ps>
Representing the O/R Address hierarchy in the Directory
Information Tree
Apr 92 Nov 92 <draft-ietf-mhsds-supmapping-02.txt, .ps>
Use of the Directory to support mapping between X.400 and RFC
822 Addresses
Apr 92 Nov 92 <draft-ietf-mhsds-mhsuse-02.txt, .ps>
MHS use of the Directory to support distribution lists
Apr 92 Nov 92 <draft-ietf-mhsds-routdirectory-02.txt, .ps>
MHS use of Directory to support MHS Routing
Nov 92 New <draft-ietf-mhsds-convert-00.txt, .ps>
MHS use of Directory to support MHS Content Conversion
MIME-MHS Interworking (mimemhs)
Charter
Chair(s):
Steve Thompson <sjt@gateway.ssw.com>
Applications Area Director(s)
Brewster Kahle <Brewster@wais.com>
Erik Huizer <huizer@surfnet.nl>
Mailing lists:
General Discussion:mime-mhs@surfnet.nl
To Subscribe: mime-mhs-request@surfnet.nl
Archive:
Description of Working Group:
MIME, (Multipurpose Internet Mail Extensions) is currently a Proposed Standard. MIME redefines the format of message bodies to allow multi-part textual
and non-textual message bodies to be represented and exchanged without
loss of information. With the introduction of MIME as a Proposed
Standard it is now possible to define mappings between RFC-822
content-types and X.400 body parts. The MIME-MHS Interworking Working Group is
chartered to develop these mappings, providing an emphasis on both
interworking between Internet and MHS mail environments and also on
tunneling through these environments. These mappings will be made in
The PIP Working Group is chartered to develop an IPv7 proposal using
the basic ideas of Pip as described in the Pip overview.
Pip is designed on one hand to be very general, being able to handle
many routing/addressing/flow paradigms, but on the other hand to allow
for relatively fast forwarding. Pip has the potential to allow for
better evolution of the internet. In particular, it is hoped that we
will be able to advance routing, addressing, and flow techniques
without necessarily having to change hosts (once hosts are running
Pip).
While the Pip overview demonstrates a number of powerful mechanisms,
much work remains to be done to bring Pip to a full specification.
This work includes, but is not limited to: specifying the header
format; specifying a basic set of error messages (PCMP messages);
specifying the Pip forwarding rules; specifying host interface messages
(particularly the directory service query response); specifying rules
for host Pip header construction; specifying modifications to existing
protocols for use with Pip (BGP IV, OSPF, ARP, DNS, etc.); specifying
Pip MAX MTU Discovery techniques; and specifying a transition strategy
for Pip.
Over the near-term, the goal of the PIP Working Group will be to produce these
specifications and supporting documentation. Over the long-term, up to
the point where Pip is definitively rejected as IPv7, it is expected
that the PIP Working Group will oversee implementations and testing of the Pip
specifications.
Except to the extent that the PIP Working Group modifies existing protocols for
operation with Pip, and to the extent that the PIP Working Group must be aware of routing/addressing/flow architectures to really make Pip general, the
PIP Working Group will not work on routing/addresing/flow architectures.
This Working Group will produce a set of three documents that describe
the Management Information Base for X.25. The first document will
specify the objects for the X.25 Link Layer. The second document will
specify the objects for the X.25 Packet Layer. The third document will
specify the objects for managing IP over X.25. The Working Group need
not consider the Physical Layer because the ``Definition of Managed
Objects for RS-232-like Hardware Devices'' already defines sufficient
objects for the Physical Layer of a traditional X.25 stack. Any
changes needed at the Physical Layer will be addressed as part of that
activity.
The X.25 object definitions will be based on ISO documents 7776 and
8208 however nothing should preclude their use on other similar or
interoperable protocols (i.e., implementations based on CCITT
specifications).
The objects in the Link and Packet Layer documents, along with the
RS-232-like document, should work together to define the objects
necessary to manage a traditional X.25 stack. These objects will be
independent of any client using the X.25 service. Both of these
documents assume the interface table as defined in MIB-II contains
entries for the Link and Packet Layer interfaces. Thus these documents
will define tables of media specific objects which will have a one to
one mapping with interfaces of ifType ddn-x25, rfc877-x25, or lapb.
The objects for the IP to X.25 convergence functions will be defined
analogously with the ipNetToMedia objects in MIB II.
The Working Group will endeavor to make each layer independent from
other layers. The Link Layer will be independent of any Packet Layer
protocol above it and should be capable of managing an ISO 7776 (or
similar) Link Layer provider serving any client. Likewise the X.25
Packet Layer objects should be independent of the Link Layer below it
and should be capable of managing an ISO 8208 (or similar) Packet Layer
serving any client.
The Working Group will also produce a third document specifying the
objects for managing IP traffic over X.25. These objects will reside
in their own table but will be associated with the X.25 interfaces used
by IP. These objects will not address policy decisions or other
implementation specific operations associated with X.25 connection
management decisions except as explicitly described in existing
standards. These objects will manage the packet flow between IP and
the X.25 Packet Layer specifically including observation of packet
routing and diagnosis of error conditions. Progress on the Link and
Packet Layer documents will not depend on progress of the IP over X.25
document. The IP over X.25 document will proceed on a time available basis after work on the Link and Packet Layer documents and as such the Link and Packet Layers may be completed before the IP over X.25 work.
All documents produced will be for use by SNMP and will be consistent
with other SNMP objects, conventions, and definitions (such as Concise
MIB format). To the extent feasible, the object definitions will be
consistent with other network management definitions. In particular
ISO/IEC CD 10733 will be considered when defining the objects for the