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Network meeting (RFC0021) Disclosure Number: IPCOM000002652D
Original Publication Date: 1969-Oct-17
Included in the Prior Art Database: 2001-Oct-17
Document File: 2 page(s) / 3K

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Internet Society Requests For Comment (RFCs)

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Network Working Group                                            V. Cerf

Request for Comments: 21                                            UCLA

                                                        October 17, 1969

At UCLA on October 10, there was a network meeting attended by:

           SDC                             UCLA

        John Kreznar                    Vint Cerf

        Dick Linde                      Steve Crocker

        Marty Bleier                    Jon Postel

        Bob Long                        Michel Elie


        Ron Stoughton

        Nancy O'Hara

        George Gregg

Topics discussed:

        1.  Revisions to BBN memo 1822

        2.  Revisions to NWG/RFC 11

        3.  Transmission of multiple control messages

1.  Changes to BBN Memo No. 1822 (underlined)

    As informally communicated by Dave Wa

    p. 11 "The IMP program can handle up to 63 active transmit links

    and 63 active receive links at a time.  If the Host attempts to

    send a message on a new link when 63 active transmit links already

    exist, a "Link Table Full" message will be sent from the IMP to

    the Host, and the message will be discarded."

    p. 11 "1.  Any link that is not used for a period of 26 seconds

       will have its entry automatically deleted by the IMP program."

[Cerf:  How about deleting only if the transmit link table is full?

 Crocker:  No, because there is no other way for links to be deleted

           so they would always tend to accumulate.  Furthermore,

           the table at one site may be full while another site may

           not be.]

    p. 13  "5 Regular with discard."

    This allows IMP systems to generate traffic which never actually

    reaches any Hosts since it will be discarded when it reaches the

    top of the IMP-HOST queue in the destination Host's IMP.  The

    Network Measurement Center will make use of this feature.

    p. 13  Message type 6 is no longer assigned...