The EVPN-MH uplink command isn't working fully since protodown doesn't seem to be supported. This appears to be system wide for all NICs, and not just specific NICs.

How to test:

vyos@vyos:~$ sudo ip link set dev eth0 protodown on
Error: Protodown not supported by device.

NICs tested:

• Virtual:
  • virtio
  • vmxnet3
  • Intel e1000
  • Intel e1000-82544gc
  • Intel e1000-82545em
  • Intel e1000e
  • Intel i82550
  • Intel i82551
  • Intel i82557a
  • Intel i82557b
  • Intel i82557c
  • Intel i82558a
  • Intel i82558b
  • Intel i82559a
  • Intel i82559b
  • Intel i82559c
  • Realtek 8139
• Physical:
  • Intel I225-V
  • Intel X553
  • Mellanox ConnectX-3 MT27500 Family
  • Realtek RTL8111/8168/8411