stefano, This is strange: last October I created a FreeBSD VNET jail and defined a wireguard interface and a vxnet interface. It was working. Today I started the jail and it doesn't work anymore:
/sbin/ifconfig vxlan create vxlanid 77 vxlanlocal 10.77.0.1 vxlanremote 10.77.0.2 inet 10.77.1.1/24
ifconfig: SIOCIFCREATE2 (vxlan): Invalid argumentWhat could be wrong?