For the time being I have worked around the deficiency by using the networkd-dispatcher. I created the script `/etc/networkd-dispatcher/routable.d/50-xfrm`:
```
#!/bin/sh
ip link add xfrm0 type xfrm dev eno3 if_id 0xabcd
ip address add 10.0.1.254/32 dev xfrm0
ip link set xfrm0 up
ip route add 10.0.2.254/32 dev xfrm0
```
For the time being I have worked around the deficiency by using the networkd- dispatcher. I created the script `/etc/networkd- dispatcher/ routable. d/50-xfrm` :
```
#!/bin/sh
ip link add xfrm0 type xfrm dev eno3 if_id 0xabcd
ip address add 10.0.1.254/32 dev xfrm0
ip link set xfrm0 up
ip route add 10.0.2.254/32 dev xfrm0
```