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This is the abbreviated version, containing approximately
57% of the total text.
Network Working Group Alex McKenzie
RFC #374 BBN
NIC 11099 19 July 1972
There are two significant developments in the operation of the network
which should be of interest to all sites:
NEW IMP SYSTEM IS RELEASED !
On Tuesday July 18, the new IMP software described in previous RFC’s
(#331,#343,#359) was apparently successfully released. We ran from
10:00am on that day until Wednesday afternoon with very few network
problems attributable to the new system. We are quite pleased with
this performance, and expect to leave the new system up permanently!!
We are, of course, aware that in any system of this size, bugs may
crop up at any time, and we solicit the help of the network community
in finding them. We also believe that the new system may have a
different "feel" to users, both terminal users and Hosts. We urge
everyone to have a bit of patience while getting used to any change in
the "feel" of the network. On the other hand, PLEASE REPORT ANY
SUSPECTED NETWORK MALFUNCTION TO THE NCC AS SOON AS POSSIBLE.
Evidence of bugs, guesses as to what went wrong, etc., are always
useful in hunting bugs, but don’t let the lack of positive proof delay
the reporting of suspected system malfunction. The NCC telephone
number is (617) 661-0100. Feel free to call collect!
The one known shortcoming of the new software is the exacerbation of a
long-standing TIP software problem. The TIP now often appears to
neglect sending an Allocate control message for some active
connection, with the effect that the Server-to-User path becomes
blocked. We are giving the solution of this problem the highest
priority! (Our current data seems to indicate that this problem is
most likely to occur when there are several users and when the Server
Host is a TENEX system. If you know of other situations where this
problem has occurred, please let us know!)
Now that the new system is up, all sites with Model 516 IMPs will be
contacted by telephone and asked to reset the switches on their IMPs