@xvo Reicast doesn't have BBA emulation support. Demul on Windows is the only DC emulator that can play online, as far as I know.

There are premade disc images for Sylverant called PSO DC Ives Pack 2.0. They're all bugfixed, online and offline capable and ready to go. Not linking them here, obviously.

I'm sure there are other private servers out there too.