Browse Prior Art Database

Formation of Network Measurement Group (NMG) (RFC0323)

IP.com Disclosure Number: IPCOM000003519D
Original Publication Date: 1972-Mar-01
Included in the Prior Art Database: 2019-Feb-12
Document File: 9 page(s) / 11K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

V. Cerf: AUTHOR

Related Documents

10.17487/RFC0323: DOI

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 25% of the total text.

Network Working Group Vint Cerf Request for Comments: 323 UCLA-NMC NIC: 9630 March 23, 1972

Formation of Network Measurement Group (NMG)

On March 17, 1972, at MIT project MAC, the following group met to discuss plans to perform measurement experiments on the ARPANET:

A. Bhushan - MIT/DMCG

V. Cerf - UCLA/NMC, Chairman, NMG

S. Crocker - ARPA/IPT

J. Forgie - LL/TX-2

R. Metcalfe - MIT/HARV/DMCG

M. Padlipsky - MIT/MULTICS

J. Postel - UCLA/NMC

J. Winett - LL/67

The purpose of the meeting was to discuss existing and planned measurements of network and HOST behavior.

1. Measurement Link #’s

It was agreed (after a ridiculously long discussion) to allocate links 159-191 for network measurement only (see RFC #317). It was further agreed that these links would be allocated in the following way:

159-174 HOST DISCARD; co-operating HOSTS receiving messages on these links will throw them away without generating an error message.

175-190 To be allocated as needed by V. Cerf - UCLA/NMC.

191 To be used by IMPs to send measurement traffic obtained from IMP statistics packages.

Cerf [Page 1]

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.

Cerf [Page 2]

RFC 323 Formation of Network Measurement Group March 1972

The NWG agreed to implement a minimal NCP instrumentation procedure which would gather by HOST for some standard 24 hour period (e.g. local midnight to local midnight) the following:

a. Total bits sent to HOST

b. Total bits received from HOST

c. Total messages sent to HOST

d. Total messages rece...

Processing...
Loading...