On Wed, 3 Mar 2021 12:13:04 +0100
Florian Zieboll via Dng <dng@???> wrote:

> Sure, it is more error prone to work with enx"$mac" NIC names, but as
> it's probably too late for complaining, I just made my router "future
> proof":
>
> backup /etc/:
> $ cp -a /etc /etc.bkp
>
> cd to /etc/:
> $ cd /etc/
>
> delete related custom udev rules
> $ rm ./udev/rules.d/7?-persistent-net-*\.rules
>
> define future NIC names as variables to avoid mistakes:
> $ eth0_new=`udevadm test-builtin net_id /sys/class/net/eth0
> 2>/dev/null | grep "ID_NET_NAME_MAC=" | sed 's/ID_NET_NAME_MAC=//'` $
> 2>eth1_new=`udevadm test-builtin net_id /sys/class/net/eth1
> 2>2>/dev/null | grep "ID_NET_NAME_MAC=" | sed 's/ID_NET_NAME_MAC=//'`
>
> test run to stdout (commented lines are excluded)
> $ grep -r ^[^#]*eth[0-1] ./* | sed -e "s/eth0/$eth0_new/g" -e
> "s/eth1/$eth1_new/g"
>
> replace NIC names "inplace" (with commented lines still excluded)
> $ grep -rl ^[^#]*eth[0-1] ./* | xargs -l1 sed -i -e
> "s/eth0/$eth0_new/g" -e "s/eth1/$eth1_new/g"
>
> reboot
>
> so far, everything seems to work fine -_-


Ooops, that was too quick: I forgot to remove the active dhcp leases
under /var/lib/dhcp/