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- This is only a rough draft - Megan 04/20/92
-
- 18 March 1992
-
- Point-to-Point Protocol Extensions (pppext)
-
- Chair: Brian Lloyd, brian@lloyd.com
-
- Mailing Lists:
- General Discussion: ietf-ppp@ucdavis.edu
- To Subscribe: ietf-ppp-request@ucdavis.edu
- Archive: ucdavis.edu:archive/ppp-archive
-
- IETF PPP
-
- *Appletalk
- *LQM
- *MIB
- *IPX
- *Decnet
- *CLNP
- *Physical Layer
-
- Brian Lloyd distributed a memo titled "The PPP Internetwork Packet
- Exchange (IPX) Control Protocol" submitted by Novell. Karl Fox
- distributed a PPP Pocket Reference card from Morningstar Technologies.
-
- There will be a delay in the issuance of an RFC for LCP, IPCP, and
- Authentication due to an oversite within the IAB. However, there
- are not going to be any changes to the drafts prior to becoming RFCs.
- So it is safe to implement, and still be in compliance.
-
- Questions re: IP Address Negotiation. The implementor needs to
- support old format until PPP becomes a full standard. First check to
- see if the peer is using the old format. If so, negotiate IP
- addressing using the old algorithm. This procedure applies until PPP
- is a full standard. After that, support will not be provided for old
- algorithm for IP address negotiation. If you do IP you need to go
- ahead and do the new IP address negotiation scheme.
-
- Each of LCP, IP Control, LQM, and Authentication have their own
- document.
-
- Brian asked, "how many here are actively working to implement PPP?"
- Approximately 12 hands went up.
-
- As for penetration in the market it was noted that BARRNet now runs
- PPP on links to member sites.
-
- APPLETALK
-
- Brad Parker of Cayman presented an updated draft of his Appletalk over
- PPP document. Feedback from Bill Simpson and Chris Ranch of Novell.
- The document was forwarded to the IETF drafts mailing list. Good
- review from Appletalk community, supports ARAP. Will support router
- to router half routing. Doc will be placed on Merit.edu and
- Angband.stanford.edu in addition to usual places.
-
- LINK QUALITY MONITORING (LQM)
-
- The previous version of LQM was not widely implemented so major
- changes were deemed acceptable (this choice was made at the Santa Fe
- IETF meeting). As a result the general mechanism was redefined.
- should be able to determine if a synchronous link is up. Flow control
- monitoring not recommend for async. LQM is useful for high speed
- point to point between router vendors. LQM will give continuous state
- of the link info. This is good for OSPF type link state relative
- protocols.
-
- PPP MIB
-
- Frank Kastenholz of Clearpoint (kasten@clearpoint.com) updated MIB for
- PPP. Discussion has been open on the mailing list. Frank presented
- an update. PPP is a complex protocol so the MIB grew to almost 200
- variables. Frank says this MIB has to be trimmed down, but others are
- asking for more. This MIB doesn't even address Appletalk, Decnet,
- CLNP.
-
- Should this MIB cover NCPs? was asked.
-
- Frank drew on the overhead. There were four columns: Protocol,
- Mandatory, Conditional Mandatory (if you are trying to control PPP
- instead of just monitor), and Optional. This graph allowed the
- members of the WG to assign each variable to a category.
-
- One reason to have lots of MIB variables is the need to configure PPP
- in routers via SNMP (the router from NAT was used as an example since
- it is only manageable via SNMP). It was suggested that all
- configuration variables be in the optional column and get rid of the
- Conditional Mandatory column.
-
- Discussion continued as to how necessary it might be to trim down the
- variables. It was determined that MIB variables present for debugging
- purposes be discarded. Brian requested that Frank Kastenholz, Bill
- Simpson, and Glenn McGregor meet to pare down the MIB prior to the
- next day's WG meeting.
-
- IPX
-
- Christopher Ranch of Novell took the floor to lead the discussion of
- IPX over PPP. The Novell NCP has no options and this is in conflict
- with what Shiva has proposed. Brian recommended that Novell and Shiva
- hammer out the differences and produce a single unifying document.
- The working group indicated that they wanted to see an address
- negotiation and a compression option added to Novell's proposal.
- Brian also asked Chris to consider adding negotiation of a routing
- protocol IF he thinks it would be useful.
-
- DECNET
-
- There appeared to be no progress in the area of DECNet over PPP.
- Further work on this subject is awaiting an implementation and/or a
- new draft document.
-
- OSI/CLNP
-
- Bill opened discussion with the remark that there is a well-written
- document for which there are no implementations. This is a no-option
- document that differentiated between the three different kinds of
- CLNP. This will be re-addressed when there is an implementation.
- Christopher Ranch will forward requests on this to the correct person
- at Novell who is beginning an implementation.
-
- BRIDGING
-
- Fred Baker is looking for implementation experiences to document.
- 3-COM has done bridging over PPP. Currently the document needs to
- 1) clarify the concept of a virtual ring, and
- 2) tighten up the language.
-
- 19 March 1992 09:00
-
- 32-BIT FCS
-
- Bill Simpson stated the issues with 32-bit FCS. These being that DEC
- owns patents on a procedure of combining the 32bit and 16bit FCS into
- a 48bit FCS to be used while 32bit FCS is being negotiated. Noel
- Chiappa said that DEC will make a license to their process freely
- available. DEC will provide a general grant of right to use the
- technology and will provide a letter to the IETF stating so.
-
- Action item: Karl Fox of Morningstar Technologies, being
- a vendor of a company with an implementation, is going to take the
- task of getting the letter from DEC releasing the rights to the
- process to the world.
-
- PHYSICAL LAYER
-
- Where/how to handle the physical layer information. The PPP mailing
- list concluded that the LCP layer is not the place. Bill Simpson
- stated that PPP is supposed to run over anything; in other words if
- you have two wires you should be able to run PPP. Brian Lloyd
- suggested the need for an implementation reference. There was
- agreement to this. Someone said this should be an informational RFC.
- Items to be covered included: PPP SYNC interface with an eye towards
- RS232, V35, V36, RS422/RS449; async implementations; switched
- circuits, i.e. Hayes compatible, X21, V25bis dialing; and definition
- of physical layer up/down determination; etc.
-
- Questions presented:
-
- How are we going to deal with ISDN? This is a topic of future
- discussion and work with the IPLPDN WG.
-
- Chat scripts and dealing with a login sequence on an async link. What
- is the other end going to send?
-
- MIB REVISITED
-
- Frank took the floor to revisit the issue of MIB variables. Together
- with Bill Simpson, Glenn McGregor, and some input from Jeff Case they
- got the number of variables to just over a hundred. This is down from
- 196. They did not deal with every section, and some still need to be
- added for Appletalk, and IPX. It will be necessary to know if and
- what will be monitored in IPX over PPP.
-
- Changes: link extensions table is gone, FSM table(s) are gone, these
- were deemed to be debugging information. It was decided that it made
- more sense to return the link quality reports as a single aggregate
- MIB variable instead of permitting each field withing the LQR to be
- queried separately. Individual variables in the LQR are not very
- useful by themselves plus in order to make sense of the timely
- information it is necessary to see a complete "snapshot" in one
- operation.
-
- On the philosophy of configurable parameters: the choice seems to be,
- a rich set of "knobs" or allowing the vendor to completely control the
- initial and desired state of the implementation. There was no
- hard-and-fast decision so it was left up to Frank to clean up what was
- decided and to post all changes to the MIBs to the mailing list in a
- few weeks where discussion will begin anew.
-