From: Alan Ford_at_NORTHPOWER on 06/11/97 10:59
Hi all, due to the need to have all our local PC's on the same subnet as
our server. We had to change our subnet mask from 255.255.255.0 to
255.255.240.0
This MASK was created so as to encompass all our orginal local subnets so
that we only had to change the MASK on each machine instead of their
IP addresses (read 200 pcs).
ie We went from an address like .... 192.168.113.20 255.255.255.0 to
192.168.113.20 255.255.240.0 which lets this machine talk directly to
the following other ranges (without going through it's default GATEWAY)
192.168.112 -> 192.168.127
This is fine, it works , sort of.
Upon investigation we have found that our two 8200's one on DU3.2g, the
other DU4.0b, both with FDDI (device name fta0)
and IP Addresses 192.168.115.1 , 192.168.115.2 respectively where using
their gateway to get to the above addresses.
What I found was in '/etc/rc.config' their was this line
IFCONFIG_0="192.168.115.1 netmask 255.255.240.0"
which was good
when I did ifconfig fta0 I got
fta0: flags=8c63<UP,BROADCAST,NOTRAILERS,RUNNING,MULTICAST,SIMPLEX>
inet 192.168.115.1 netmask ffffff00 broadcast 192.168.115.255 ipmtu
4352
which was bad as the netmask should have been fffff000 (and really the
broadcast should have been 192.168.127.255)
all the other machines (when I do a tracert ) talk directly to the other
machines in all cases.
I think I can remember something funny about FDDI in Alpha's but I can't
rember what it was...
TIA (Maria)
Alf...
Received on Thu Nov 06 1997 - 18:28:13 NZDT