It's needed to replace fail message "Link device" to "Source interface"
We no longer have the "link" option
vyos@r1-roll# set interfaces pseudo-ethernet peth1 address 10.0.0.5/24 [edit] vyos@r1-roll# commit [ interfaces pseudo-ethernet peth1 ] Link device must be set for pseudo-ethernet "peth1" [[interfaces pseudo-ethernet peth1]] failed Commit failed [edit] vyos@r1-roll#
Link to interface
vyos@r1-roll# set interfaces pseudo-ethernet peth1 source-interface eth1 [edit] vyos@r1-roll# commit [edit] vyos@r1-roll#