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pppext-minutes-94dec.txt
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1995-02-28
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CURRENT_MEETING_REPORT_
Reported by Fred Baker/cisco Systems
Minutes of the Point-to-Point Protocol Extensions Working Group (PPPEXT)
Compression Control Protocol
Fred Baker opened the meeting, advising the working group on the status
of the issues with Motorola regarding the Compression Control Protocol.
On 1 November, Steve Coya, Executive Director of the IETF, advised Fred
that
``I received a letter in the mail from Darlene Stockley at
Motorola. In it, she states that Motorola will offer licenses
on fair, reasonable and non-discriminatory terms. She closes
by saying they will have terms available by the end of the
year.''
A copy of that letter was sent to Fred as well. On 1 December, Motorola
apparently sent a letter to Steve (copying Fred) describing those terms.
Neither Steve nor Fred have received it at this point. Fred will advise
the working group of the contents of the second letter when he receives
it.
PPP Banyan Vines Control Protocol
Fred, in the absence of it's author (Steve Senum), presented the updated
draft of the PPP Banyan Vines Control Protocol (BVCP). This draft is
draft-ietf-pppext-vines-01.txt. It formalizes the use of the control
and data protocols specified by Assigned Numbers, and three options
relating to routing protocol messages and fragmentation. The working
group approved advancement to Proposed Standard.
PPP XNS IDP Control Protocol
Fred, in the absence of it's author (Steve Senum), presented the updated
draft of the PPP XNS IDP Control Protocol (XNSCP). This draft is
draft-ietf-pppext-xnscp-00.txt. It formalizes the use of the control
and data protocols specified by Assigned Numbers, and proposes no
options. The working group approved advancement to Proposed Standard.
PPP Encryption Control Protocol
Gerry Meyer presented the PPP Encryption Control Protocol (ECP). This is
draft-ietf-pppext-encryption-00.txt. This protocol is modelled on the
CCP, including the use of separate informational documents describing
separate encryption procedures.
o Negotiation of encryption using PPP
- Protects against eavesdropping on that link.
- Dependent on the encryption algorithm used.
- Care with which any `secrets' are protected.
- Protection is not end-to-end (multiple hops).
o Main Features
- Encryption algorithm negotiated using PPP.
- Similar concept to Compression negotiation.
- Standard encryption algorithms.
- Manufacturer specific encryption algorithms (IEEE 802 OUI).
- Algorithm may be different in each direction.
- Negotiate above or below multilink (different protocol).
- Unlike CCP, Reset and Reset Ack not supported.
- If negotiation fails - call is aborted.
One change was suggested by Jeff Weiss (Magnalink Telco), to add an
encryption reset and acknowledge, for use by non-self-synchronizing
encryption procedures. Gerry had been concerned that the procedure
might be problematic due to Motorola's compression patents. Jeffrey
indicates that he holds a patent that Motorola cites as prior art. This
patent specifies a reset/acknowledge procedure. He will give the
Executive Director the necessary letter.
When Gerry has updated the draft, we will ask for a consensus on the
list and send the document to the IESG for consideration as a Proposed
Standard.
Synchronous Data Compression Consortium
The Synchronous Data Compression Consortium made a presentation to the
working group at the last IETF meeting, describing its use of PPP
between DSUs. It has now largely completed its design and is about to
ask TR 30.1 to recommend the use of the procedure. These documents are:
o PPP for Data Compression in Data Circuit-Terminating Equipment
(DCE)
draft-ietf-pppext-dce-compress-00.txt
o PPP LZS-DCP Compression Protocol (LZS-DCP)
draft-ietf-pppext-lzs-dcp-00.txt
o PPP Serial Data Transport Protocol (SDTP)
draft-ietf-pppext-sdtp-00.txt
There was no representative present to present them. David Patrick of
Motorola stood to describe what they are and lead a discussion on them.
Several questions were raised concerning technical aspects. The people
concerned about them will contact the author and discuss them on the
dsu-compress[-request]@paradyne.com list. These will be published as
Informational RFCs when complete, due to their status in ANSI.
Other Business
Discussion then continued with subjects from the floor: the development
of IPCP, LQM, Authentication, and AppleTalk.
IPCP is being updated by Gurdeep Singh Pall of Microsoft. On
6 December, he advised the chair and the PPP Editor that the document
had been posted for anonymous FTP. He is soliciting those inputs before
posting an Internet-Draft.
LQM, apart from a few typographic errors, appears to have several
interoperable implementations and serve its purpose well. Bill Simpson
will update it and post a new Internet-Draft. We expect to send this in
as a Draft Standard.
In the currently widely held security model, exchange of passwords in
the clear does not appear wise. Thus, PAP is no longer a recommended
procedure. CHAP, however, is still believed to be acceptable for a
certain class of problems. Bill will create a new Authentication
Internet-Draft which does not have PAP in it. The IESG can declare
RFC 1334 ``Historical,'' making PAP a historical procedure, and the new
CHAP-only draft will become a Draft Standard when a consensus on the
list supports that.
The Kerberos and one-time passwords effort (Carrels, Blunk, and Parker)
has not to date produced a requirements document. Two companies,
however, have deployed incompatible authentication procedures of that
type. Brad Parker will update the draft-ietf-pppext-gap-00.txt draft
according to deployment experience, and we will publish that, probably
as a Proposed Standard. Fred will contact Larry Blunk to determine
whether the combined effort is still likely to occur.
Brad Parker indicates that he has received no comments on his AppleTalk
draft. Working group members are asked to read the draft and comment on
it.
Craig Fox and Moon are checking with their management concerning
PPP-a-thons adjoining the Danvers and Stockholm IETFs. These would be
for general protocol testing and testing on ISDN, X.25, etc.,
respectively. Rachel Willmers of Spider is also trying to organize some
testing. This will be discussed further on the list as we determine
what facilities are available and what folks are ready to test.