FriendlyELEC-Forum

When connected to my Box (Orange Pro), and set to DHCP, ,the eth0 port does not get an IPv4 address. ifdown / if up shows DHCPDISCOVER but no DHCPOFFER.
Set in the same way, eth1 and eth2 work fine (two DHCPDISCOVER and after the second DHCPOFFER etc.

When eth0 is connected to a second R5S which has a dhcp server, then it works normally.

What can explain that ? And what can I do to fix it ? Since eth1 and eth2 works fine, the box is not responsible of the problem.

The problem was that the cable on our system does not support GB. The os (Ubuntu 20) did not check this correctly and since adapters at the end of the connexion were both GB capable, the connection was set to GB, which could not work for us (it requires four pairs, and we have two).
The solution was forcing the connection to 100MBs.

We are now running a Debian 11 and the problem no longer happens.