Well, I might as well put in my 5cts worth.
Here we are with a sold off co-generation plant. The decision was make to retain the
IP addresses of the second ethernet ports on the Foxboro systems.
No problem so far. But for accounting and control purposes it was necessary to
maintain production/control information to come to us. Now here we have a challenge.
COGEN FOXBORO 152.153.16.x -- NEW COGEN NETWORK 10.202.x.x -- OUR INTRANET
152.153.x.x -- MELTERS FOXBORO 152.153.11.x
To add to the challenge the owners of 10.202.x.x installed a firewall between them and
OUR INTRANET and we had placed routers between the FOXBOROs and the rest of the world
to keep them isolated from network storms. They do happen, you know :-)
The solution was very simple.
Only on COGEN I did the following:
Add to /etc/hosts
152.153.16.50 ROUTER
Add to /etc/defaultrouter
ROUTER
But this didn't work.
FOXBORO networks are configured as class B network.
So I added a script to /etc/fox/userapps.dat called 'routing.scr' which looked like
this:
#!/bin/sh
#
# We have to force the netmask like this because at boot time
# FOXBORO is resetting it to class B subnet
# This is ok for the NODE BUS but not for the second ethernet card.
#
# There are two 152.153.x.x networks separated by 10.202.x.x
# who need to be able to talk to each other
# 152.153.16.x on the foxboro side of the router and
# 152.153.the.rest on the other side of 10.202.x.x
#
# This script is called from /etc/fox/user_apps.dat
#
# 17-April-2000 F.Schouten.
#
ifconfig le1 netmask 255.255.255.0
And they lived happy ever after..
G0AP01# netstat -r
Routing Table:
Destination Gateway Flags Ref Use Interface
- - -- -
localhostlocalhost UH 0117 lo0
152.153.16.0 G0AP01E2 U2 1787 le1
151.128.0.0 G0AP01U3 96 le0
224.0.0.0G0AP01U3 0 le0
default ROUTERUG 0 6135
G0AP01# ifconfig -a
lo0: flags=849UP,LOOPBACK,RUNNING,MULTICAST mtu 8232
inet 127.0.0.1 netmask ff00
le0: flags=863UP,BROADCAST,NOTRAILERS,RUNNING,MULTICAST mtu 1500
inet 151.128.16.65 netmask broadcast 151.128.255.255
ether 8:0:20:7e:97:fc
le1: flags=863UP,BROADCAST,NOTRAILERS,RUNNING,MULTICAST mtu 1500
inet 152.153.16.1 netmask ff00 broadcast 152.153.255.255
ether 8:0:20:7e:97:fc
Cheers,
Frits Schouten
BHP-NZSteel
p.s A bit more that 5cts worth, I suppose :-))
EOM
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