Using xPC Target, how do I configure multiple NICs for real-time UDP?

Hi,

I'm using xPC Target (5.2), and I'm running into an issue when trying to configure multiple NICs for use with real-time UDP. I could just use 1 NIC with an ethernet switch, but I'm trying to make very sure that no packets get dropped, while using a 1ms clock. I've got 2 dual-port (i.e. 2 ethernet jack) 100 Mb/s NICs plugged into the target PC's PCI slots. I tried to use 2 of the Network Configuration blocks from the Real-Time UDP library, and everything compiles and downloads just fine, but when I run it on the target, I get the following error:

"EtherInit: EtherID 1: Registration Error 2

ARP: Invalid IP Interface 0 (1309)

IP: Invalid IP Group 0 (271)

UDP: Invalid IP Group 0 (113)"

However, each card works fine when only that card is configured. I also tried having both connections on the same dual-port NIC, as well as having 1 connection on each card. Is it even possible to do Real-Time UDP with multiple NICs, or do I need to use the Raw Ethernet library?

Thanks so much,

Zach Irwin

[James]

I have this exact question. Is it even possible?

If you look under mask, you can change parameters in the UDP, IP, and ARP from their defaults. By doing this, I was able to get rid of the errors. I think each card set up for Real-Time UDP needs a unique IP group or interface number. Unfortunately, I don't know what these numbers actually mean and I can't find any documentation for it.

And when I do this, the NIC for which I changed the default group/interface settings does not appear to actually send any packets. It thinks it sends packets, but nothing appears at the other side.

Answer 1

[Chethan Pandarinath]

I just wanted to mention that I've seen this same error (EtherID X: Registration Error 2) when I accidentally had two Network Configuration blocks in the model that used the same Device ID. So definitely make sure each of your NICs has its own Device ID.