On the ET10000 there are 2 LAN connections (100Mbit and Gbit) - I happen to have a Gbit LAN so connect to the Gbit port.
I also usually do a complete image reflash when going to new version, which works fine on all my Xtrend boxes (including the ET8000) except the ET10000
So what happens on the ET10000 ?
Download new Image version -> hit restore -> Image reboots.
Restore backup? Yes
Restore settings - Yes
Restore plugins -> Yes
Says restoring settings, then unable to restore plugins, NO LAN connection
Reboot, Blue button, restore backup settings and plugins - reboot.
On reboot, no channels/Bouquet - so Blue button, restore settings again.
Reboot - works.
So I guess restore needs to check all LAN ports for connection or after restore settings, restart network before plugins restore.