What are the DHCP settings in the unit? Maybe the previous owner has changed something there?
(Appendix A in the manual)
Are you sure you need a crossed cable?
We have always been able to use any Artist device, anywhere within our Domain network, by simply pluggin in the (non-crossed) cable into one of our routers. So, from any workstation, we can see all workstations and all devices.
But before you go into that, do you see the Eucon adapter in Nuendo Device Setup?
If it’s not there, the click on the “+”. It should be listed there. Then simply add it, so it is “active” in Device setup.
If the Eucon adaptor is not showing up, then it’s because it is not installed (properly)
Fredo