If you want to boot over the network you can also use iscsi via ipxe. snp.efi is loaded via u-boot which then can mount an iscsi target like the miniroot filesystem over the network.
> Hello everybody again. > > I saw a commit > (https://github.com/openbsd/src/commit/b0a12b40c03a7847ac690bf28d53883110b63b61) > that implements tftp booting using EFI's Simple Network protocol, > but nothing was changed on my Pi 3b. The output is the same: > boot> > booting tftp0a:/bsd: open tftp0a:/bsd: Operation not permitted > > Am I doing something wrong or this mode is not yet implemented?