Path: utzoo!dptcdc!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!RICHTER.MIT.EDU!krowitz
From: krowitz@RICHTER.MIT.EDU (David Krowitz)
Newsgroups: comp.sys.apollo
Subject: SR10.1 TCP/IP question ...
Message-ID: <8904181910.AA07281@richter.mit.edu>
Date: 18 Apr 89 19:10:22 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 46

I've nstalled SR10.1 on my DN560 using the /etc/hosts files
(as opposed to name servers). The DN560 is attached to our
ringnet which, in turn, is connected to our campus etheret
by a DN660 running SR9.7 and Domain TCP 3.1 (the AEGIS TCP/IP).
The ringnet is net 18.138 (using a subnet mask of 255.255.0.0) and
the campus ethernet segment for our building is 18.83. We use
the /etc/rc.local file distributed with sr10.1 pretty much as
it cam (starts up /etc/tcpd, runs /etc/iconfig with the command
        	/etc/ifconfig net0 `/etc/hostname` netmask defaultmask

runs /etc/routed with the -f and -h options [as it is set up in 
the distributed file], and then starts inetd). The name 
'defaultmask' is defined in /etc/hosts as 255.255.0.0, yet
when the machine is booted, we can not connect to any machine
(ie. ping, telet or ftp) not on the local ringnet *unless*
the rip_server (the AEGIS TCP/IP routing daemon) was running
on the gateway at the time the sr10 node was booted. The /etc/hosts
file lists both an address on the Apollo ringnet and the campus
ethernet for the gateway node, and the subnet mask should have
been defined correctly by the 'ifconfig' command, yet we
can not access the campus ethernet unless the routing daemon
was running on the sr9.7 machine whch is the gateway.

I've tried several different variations on the /etc/hosts file
(removing comments, changing the order of entries, etc), hardwired
the subnet mask into the 'ifconfig' command, etc. and the only
thing which seems to make a difference is the presense of the
routing daemon on the gateway node. I understand that the
'-f' option of /etc/routed clears the tcp daemon's routing
table pror to reloading it with fresh info, but shouldn't it
fall back on the /etc/hosts file when the info can't be
found in the internal tables? When I add a new host to /etc/hosts
I can access it immediately whether or not the machine is
on my local ringnet or on a remote network. Should I not be
running /etc/outed on a non-gateway node? The tcp manual for
sr10 and the defaults in the /etc/rc.local file suggest that
I should be running it.


 -- David Krowitz

krowitz@richter.mit.edu   (18.83.0.109)
krowitz%richter@eddie.mit.edu
krowitz%richter@athena.mit.edu
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(in order of decreasing preference)