NWG/RFC #295 JBP 2-JAN-72 15:35
Protocol Workshop Report
Report of the Protocol Workshop
By Jon Postel.
This is a report on the decisions reached at the protocol workshop
held in conjunction with the Network Working Group meeting held in
Cambridge from 10 to 14 October, 1971
The workshop addressed itself to protocols of four types: IMP-Host,
Host-Host, Initial Connection, and Process-Process.
The idea of IMP provided status reports to be exchanged via new
IMP-Host protocol messages was discussed and rejected because it was
felt that the level of state information which could be reported was
not sufficient to be worth the trouble of implementing this mechanism.
The Host-Host Protocol was discussed and several problems were brought
to light, among them were the following listed together with the
The GVB - RET mechanism may prove useful sometime in the
future so it will be retained though no one appears to be
using it now, however spontaneous RET commands are
The ECO - ERP commands are useful and should be supported,
but spontaneous ERP commands are explicitly prohibited. A
further restriction is that a second ECO will not be sent
until the first ECO has been answered. Note that any of
the following may be an answer to an ECO: ERP, RST,
"Destination dead", or "Incomplete Transmission".
The RST - RRP commands are useful, but the proper use of
these commands for determining the status of host software
is still open for discussion (please direct comments to Jon
Postel), however spontaneous RRP commands are explicitly