Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site ucbvax.ARPA 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 Date-Received: Tue, 1-Oct-85 03:21:50 EDT Sender: daemon@ucbvax.ARPA Reply-To: tcp-ip@ucb-vax.arpa Organization: The ARPA Internet Lines: 20 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? -------