Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!shelby!agate!ucbvax!RICHTER.MIT.EDU!krowitz From: krowitz@RICHTER.MIT.EDU (David Krowitz) Newsgroups: comp.sys.apollo Subject: Re: TCP/IP hangup Message-ID: <9102151409.AA22510@richter.mit.edu> Date: 15 Feb 91 14:09:37 GMT Sender: daemon@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 56 Hmmm ... I've got nearly *exactly* the same configuration, ie. a DN3500-8MB, with 697 MB disk, Apollo token ring, and ethernet cards. It acts as the sole gateway between our Apollo token ring and the MIT campus-wide ethernet. We are running SR10.2 with (I believe) the standard (ie. non-patched) TCP/IP daemon -- and we have *no* problems with the machine. Our software versions are as follows: $ bldt **** Node 1C3B2 **** "//rayleigh" Domain/OS kernel(7), revision 10.2, October 13, 1989 12:51:22 pm $ ts /etc/tcpd Ver Name Time Stamp File Name -------------------------------------------------------------- c 1 net_main 1989/09/19 18:17:00 EST (Tue) /etc/tcpd Our "ifconfig" commands in the /etc/rc.local file are as follows: /etc/ifconfig dr0 18.138.0.117 netmask defaultmask /etc/ifconfig eth0 18.83.0.110 netmask defaultmask We do *not* run /etc/routed on any of our nodes other than the gateway. The MIT campus network office doesn't even recommend that, since there is only 1 route from the Apollo token ring network to our building ethernet (ie. our DN3500 gateway), and only 1 route from the building ethernet to the campus FDDI optical backbone. The networking office claims that the BSD implementation of the routing protocals is inherently inclined to jam you (your) network, and therefore prefers all machines to use static routing. (other than the machines which connect the building ethernets to the backbone -- which are special machines which only do routing). The jamming apparently results from a cascading effect that can occur when all the "routed"s in an internet try to update each other. I can't get a time stamp for our ethernet microcode file (/com/ts won't report such things for files of type "nil"), but you can try comparing the file size: $ ld -a /sys/ethernet8_microcode sys type blocks current type uid used length attr rights name file nil 7 7168 P prwx- /sys/ethernet8_microcode 1 entry listed, 7 blocks used. -- David Krowitz krowitz@richter.mit.edu (18.83.0.109) krowitz%richter.mit.edu@eddie.mit.edu krowitz%richter.mit.edu@mitvma.bitnet (in order of decreasing preference)