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Question PC with multiple network cards

P

PeteSeel

Junior Member
Hi Gurus,

I find myself working with a PC configuration consisting of a Windows machine with four network cards setup with IP addresses 192.168.0.1, 192.168.0.10, 192.168.0.20 and 192.168.0.30 and one piece of equipment attached to each network card. This is not my configuration and I know it is wrong but I'm finding it difficult to explain why.
Unfortunately the configuration seems to work, but the throughput seems to be limited. When data is sent from the PC to the equipment is that data being duplicated on all cards.

Cheers
Pete
 
It's "wrong" because it's unnecessarily complicated. You could use one of those NIC's, put it on a switch with the other devices, and everything talks together.

More information of the end devices, their configuration, and their uses to assist furuther.
 
If you have four separate networks, then you should have four separate networks.

I guess all four addresses (and addresses of those devices) are all in the same 192.168.0.0/24 subnet. I'm surprised that such would work at all.

I would perhaps set the four NICs (and corresponding equipment addresses)
Code: 
192.168.0.1/24  (192.168.0.2/24)
192.168.10.1/24 (192.168.10.2/24)
192.168.20.1/24 (192.168.20.2/24)
192.168.30.1/24 (192.168.30.2/24)
 
The problem you run into is that any nic technically can reach any device since they are on the same subnet. So even though you are trying to reach the device physically on .30, when you try to go to that device, whatever nic windows chooses (since they all can reach the destination) will try until it times out and then windows moves to the next card and tries again until it gets it right. This can waste a whole lot of time.

The way to correct the situation is to either use only one nic and put all the devices on a switch and connect the nic to the switch so that everything can be reached any time by a single nic; or, set different IPs like mv2dellnull laid out which will give you 4 separate networks and each device will then be on its own network only reachable by its connected nic so windows won't go hunting around.
 
Is is a Computer that you built/ bought?

If yes what was the reason/purpose for this "Bizarre" configuration?

If this some one else computer find what was the idea behind this setting?

If you got this computer this way and currently it is yours as part of a Home LAN....

Leave the best/fastest Network card in, and get the other three out.


😎
 
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