I have a Windows 7 Pro machine with 3 NICs. One is the main network NIC and has worked fine for some time. The other two are wired to managed switch monitoring ports using random, off subnet, ip addresses .. since they only need to receive. Then I can look at them with Wireshark.
(I don't want the monitor traffic on the main subnet of course).
This has worked very well.
Suddenly I can't see any of the computers on the network.
now if I use net view, I get the "can't be found or opened" message.
So I changed the node type to broadcast or "1" in the registry.
Now net view shows my computer as the Master Browser. But it's on one of the monitor NIC IP addresses!! ??
So, I disabled the monitor NICs and now I can see the computers on the network.
But I don't want them disabled.
I don't understand what happened to cause this. I'd like to understand.
If there's a better way to do monitoring, I'd like to know.