A few comments: There are two times when network connectivity matters - first, on the initial boot for the install, and second, when DSM finally boots after install.  Just because it works for install doesn't mean it will work when the DSM flavor of Linux is initialized.   If DSM boots post-install and you observe connectivity, it isn't "lost" due to instability unless you have a NIC hardware failure, which is incredibly unlikely.   System instability is not a typical