Hi,

I've uploaded the first beta of genuen excalibur including the new simple-netaid, that works with ifupdown2 and dhcpcd.

For sure, you'll find the /etc/network/interfaces a bit bizarre, but this is because dhcpcd is quite intrusive in comparison
with the deprecated isc-dhcp-client (ifupdown2 is not the culprit).

The following interfaces file is for IPv4:

auto lo
iface lo inet loopback

iface eth0 inet manual
    dhclient /sbin/dhcpcd
    post-up /usr/sbin/dhcpcd -4 -1 $IFACE
    pre-down /usr/sbin/dhcpcd -4 -1 -k $IFACE || :

iface wlan0 inet manual
    dhclient /sbin/dhcpcd
    post-up /usr/sbin/dhcpcd -4 -1 $IFACE
    pre-down /usr/sbin/dhcpcd -4 -1 -k $IFACE || :

Bear in mind that this is a beta. There are still some bugs pending to be fixed. For example, if you disconnect from a installed WiFi,
the wpa_supplicant config file installed at /et/network/interfaces/wifi will be removed.

Thanks for your patiente :)

Aitor.