NetBSD11: networking with bhyve

Hello,

has anyone by chance had any success so far getting NetBSD11 and 
networking going with bhyve?

vioif is telling me, otherwise reachable hosts on the same subnet are 
down and I have also not been able to  get vioif to work reliably with 
virtualbox either.
Using pcn0 instead with vbox did the trick.

Hence I have then tried the e1000 driver for bhyve, but ping then complains:

e82545: packet too small for writable header

Not sure, wether this message is being generated by host or by the guest.

Is there anything I might have missed? AFAIK there are no other cards 
bhyve can emulate.
Of course, the tap interface for the NetBSD client is connected to the 
bridge on the host and other guests on that bridge can talk to each other.

A passed through network cards works also fine.

Thanks

Ede