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Dual Ethernet connection

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5 replies

by rahulmycs

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I am Insturmentation guy & working on the PLC.
I am using WinNT with with one SCADA package from the Intellution.
I want to install dual NIC & establish a dual Ethenet communication with the Allen Bradley PLC (SLC5/05)
Now I want to know to have this dual ethernet communication, do I install two NIC with different IP addresses? Whether the two NIC should be of different make & model?
Alreay I tried to install two NIC, both of 3COM make 3C509B model.
But when I installed 2nd one, first onewhich is in 3rd ISA slot got disabled & 2nd one installed in 1st ISA slot is getting recognized for the same IP address of old.
So please advice me to install two NIC & make dual Ethernet connection possible.

Thanks

Rahul.

5 replies

by gopinathcs

Hi,
All systems will work with two NIC and with different Ip addresses only thing is if it is a ISA card u have to allocate different IRQs to each cards

I hope i answered

by mr_fixit

I assume you are trying to increase bandwidth using load sharing NIC's? If this were the case, the 3C509B's will not work. The 3C980C-TXM will do the trick however.
"Bidirectional load balancing works with standards-compliant switches"
Allen Bradley PLC's switches would have to allow this sort of thing. This will nto work with a hub though.

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