hi
it seems that there is incorrect behavior , some options in pppoe interfaces were removing on this commit :
https://phabricator.vyos.net/rVYOSONEXa2ab95ff68b709f7ca31006bdef6607ef4ce961d
we should add those options over default-route-distance.xml
vyos@vyos# set interfaces pppoe pppoe0 default-route-distance Possible completions: <1-255> Distance for the default route from DHCP server ``