RFC 323 (rfc323) - Page 2 of 9

Formation of Network Measurement Group (NMG)

RFC 323          Formation of Network Measurement Group       March 1972


   It should be apparent that HOSTs wishing to co-operate in the support
   of a HOST discard service should modify their NCP's to throw away all
   messages received on links 159-174 without sending an error back to
   the source HOST (no connection will be open on these links).

2.  Process Discard

   Although it was not mentioned at the meeting, C. Kline at UCLA has
   suggested a PROCESS DISCARD also with some well known socket number.
   The purpose of this discard routine would be to help us study
   Process-Process behavior of the network.

   It would be convenient if all co-operating HOSTs could write a
   Process Discard program which would simply wait for ICP on some
   standard socket number.  Until a complete survey is made of well-
   known socket numbers at each HOST, no socket number will be proposed
   (see RFC #322).

3.  NCP Statistics

   At the meeting it was apparent that several sites have already
   instrumented their NCP's out of curiosity.  In particular, Joel
   Winett, Lincoln Labs (360/67), has instrumented all connections
   originated by local TELNET users.  He gathers statistics per
   connection such as:

         a) Network connect time

         b) NCP CPU time

         c) Number of reads or writes on connection

         d) Time stamps on:

               first RFC, last RFC, first close, last close.

         e) Number of messages and bits transmitted

         f) Log of errors sent or received

   MULTICS gathers summary statistics on the number of regular (type 0)
   messages sent and received, and the number of irregular messages (not
   type 0) sent or received.








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