Subnetting and Routing Problems

[Stefan Petri]

In article <506 at cadlab.cadlab.de> schmidt at cadlab.UUCP (Michael Schmidt) writes:
>
>After installing Class B Internet numbers with a subnet mask of
>255.255.254.0 we encountered problems with routing. Perhaps
>somebody out there can give us a hint.
>
>
>Machines:
>
>	SUN 3				SunOS 4.0.1, SunOS 3.5
>	Apollo 3000/3500		AEGIS 9.7 (Networking version 3.2)
>	Nixdorf Targon/35 (Pyramid)	TOS 3.3.03 
>
Our Machines :
	Nixdorf Targon/35 (Pyramid)	TOS 3.2.00 , NSP 3.2.01
	SUN 3				SunOS 4.0
	SIEMENS PC			SINIX 2.0, SINIX 5.?
All on a single Ethernet, but we are using class A adresses.

>I don't know, whether the Targon OS No. is the same, Pyramid
>called ist. But I really would like to know that.
>
So would I.
>
>Situation:
>
>Targons and Apollos get the routing tables of the Apollo. Fine.
>
>Sun don't get the routing tables. Bad. Routed gets a response to
>its request, but after 3 minutes, all is dead again. So
>apparently the Sun don't get the broadcasts of the Apollo. 
>
>The Targon with the SLIP connection broadcasts over the SLIP. OK.
>But on the ethernet, nothing is heard by all the other machines.
>
We had a similar problem with `rwhod' until we changed our broadcast-address :
( from /etc/rc.local : )

# TODO:  Define any machine host and network names here,  
#        then check the "ifconfig" commands.
ENET0=$HOST
# ENET1=${HOST}-alt
BROAD0=89.00.00.00
# BROAD1=altnet-broad
NETMASK0=0xff000000
# NETMASK1=0xffffff00

We don't use the routed, and we never tested it, but try exchanging '00's and
'ff's in your broadcast-addresses.
Also the ".254." in your subnet-address looks a bit strange to me.
	     ^

Stefan Petri					<petri at tubsibr.UUCP>
Technische Universitaet Braunschweig, Institut fuer Betriebssysteme und
Rechnerverbund, 3300 Braunschweig, W. Germany.
Early to rise and early to bed makes a man healthy, wealthy and dead.