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Re: How to address hosts in dual ethernet networks?



Robert Latest:
> 
> What I can't figure out is how to separate the IP address spaces in
> this PC itself. There are plenty of 192.168 addresses in use in our
> intranet, and it is quite possible that addresses will be used both in
> the Intranet and in the Modbus space.

That is a broken network design.

> Suppose the application wants to talk to the Modbus device
> 192.168.0.101 on eth1 (where the Modbus devices are connected). How
> can I prevent it from connecting to a host on the intranet that
> happens to have the same address?

You can't, except when using static host routes for each intranet host
you want to connect to.

> Actually, I know that the hosts that I need to connect to on the
> intranet do not have 192.168.... addresses. So I suppose I can set up
> the routing table using a network mask or something of the sort.

That's the way to go if you can find a netmask that fits your needs.

J.
-- 
It is not in my power to change anything.
[Agree]   [Disagree]
                 <http://www.slowlydownward.com/NODATA/data_enter2.html>

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