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Path: utzoo!watmath!clyde!cbosgd!ucbvax!red.rutgers.edu!HEDRICK
From: HEDRICK@RED.RUTGERS.EDU (Charles Hedrick)
Newsgroups: fa.tcp-ip
Subject: problems getting to CISL-SERVICE-MULTICS
Message-ID: <8509300242.AA22766@UCB-VAX.ARPA>
Date: Sun, 29-Sep-85 21:20:21 EDT
Article-I.D.: UCB-VAX.8509300242.AA22766
Posted: Sun Sep 29 21:20:21 1985
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We can't seem to get CISL-SERVICE-MULTICS to accept our mail.
We can normally send very short messages, but for anything
substantial, the connection times out.  This is a fairly new
problem.  We just changed our network configuration.  Our
DEC-20 used to be directly on the Arpanet.  It is now on an
Ethernet, and we are using a PDP-11/23 gateway, with the MIT
code, further hacked and supported by Noel Chiappa.  The
major difference here is that we now have an MTU of 1500
instead of 9xx.  The gateway is supposed to do fragmentation
and reassembly.  We wonder whether either the gateway or
CISL is blowing it.  Maybe some others of you can help us
in this diagnosis by indicating whether you are having
similar problems.  Here is what we see:
  - we can get to MIT-MULTICS.  They are running the same
	SMTP but a different TCP from CISL
  - we have the same problem from Topaz, our major Unix system,
	so it isn't TOPS-20 specific
Are other folks having trouble getting long mail items to
CISL-SERVICE-MULTICS?
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