Upgraded to Debian 9.12, now have no network connection
It seems that during the upgrade process your network device got renamed. Change every occurrence of
/etc/network/interfaces, and it should get the IP address from the DHCP server.
This is caused by the configuration option
net.ifnames=1 which is enabled by default in Debian 9.
You can either:
- Update the interface name(s) in
- Set the
net.ifnames=0as a kernel parameter
See https://wiki.debian.org/NetworkInterfaceNames for more details