VLAN configuration: systemd OK

# ip -d link show extract

2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether e0:d5:5e:2f:ee:3a brd ff:ff:ff:ff:ff:ff promiscuity 0 addrgenmode eui64 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
4: enp3s0.usafe@enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
    link/ether e0:d5:5e:2f:ee:3a brd ff:ff:ff:ff:ff:ff promiscuity 0
    vlan protocol 802.1Q id 4 <REORDER_HDR> addrgenmode eui64 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535

# ip addr show extract

2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether e0:d5:5e:2f:ee:3a brd ff:ff:ff:ff:ff:ff promiscuity 0 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
    inet 10.1.253.153/24 brd 10.1.253.255 scope global enp3s0
       valid_lft forever preferred_lft forever
    inet6 2401:a400:4503:5820:253::153/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::e2d5:5eff:fe2f:ee3a/64 scope link
       valid_lft forever preferred_lft forever
4: enp3s0.usafe@enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether e0:d5:5e:2f:ee:3a brd ff:ff:ff:ff:ff:ff promiscuity 0
    vlan protocol 802.1Q id 4 <REORDER_HDR> numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
    inet 10.1.250.153/24 brd 10.1.250.255 scope global enp3s0.usafe
       valid_lft forever preferred_lft forever
    inet6 2401:a400:4503:5820:250::153/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::e2d5:5eff:fe2f:ee3a/64 scope link
       valid_lft forever preferred_lft forever

# ip -4 route show

default via 10.1.253.1 dev enp3s0 proto static
10.1.250.0/24 dev enp3s0.usafe proto kernel scope link src 10.1.250.153
10.1.253.0/24 dev enp3s0 proto kernel scope link src 10.1.253.153

# ip -6 route show

2401:a400:4503:5820:250::/80 dev enp3s0.usafe proto static metric 1024 pref medium
2401:a400:4503:5820:253::/80 dev enp3s0 proto static metric 1024 pref medium
2401:a400:4503:5820::/64 dev enp3s0 proto kernel metric 256 pref medium
2401:a400:4503:5820::/64 dev enp3s0.usafe proto kernel metric 256 pref medium
fe80::/64 dev enp3s0 proto kernel metric 256 pref medium
fe80::/64 dev enp3s0.usafe proto kernel metric 256 pref medium
default via 2401:a400:4503:5820:253::1 dev enp3s0 proto static metric 1024 pref medium