cRIO 9045 won't listen to UDP broadcast

[FObersteiner]

I've got a cRIO 9045 as well as two PCs on a private subnet, 192.168.232.x, connected via a simple network switch. I try the make the cRIO receive a UDP broadcast within this subnet. The broadcast message is just a few bytes and goes to 192.168.232.255 (example VIs attached).

what works:

• sending a UDP message to the cRIO (no broadcast but specific IP & port)
• broadcast from the cRIO to the PCs, i.e. the PCs have no issues receiving the broadcast
• broadcast from one PC, receiving on the other

what doesn't work:

• broadcasting from one of the PCs, receiving on the cRIO

I'm at loss of ideas where to look now, any suggestions how to get this going? Any configuration of the cRIO I missed that it also receives UDP broadcast messages?

[FObersteiner · Accepted solution]

solved the issue by using the default IP (i.e. not setting it explicitly):

I'm no UNIX expert but I've seen this behavior on UNIX systems before. What leaves me wondering is the fact that I'm using adapter eth1 here, not eth0 (which I'd assume to be the default). eth0 is set to DHCP, and receiving the UDP broadcast still works if eth0 is also connected.