[HECnet] New network card in the Alpha, how do I reconfigure DECNET?

Hi, I've got an AlphaServer 300 running as a clustered satellite node from an AlphaServer 1000A. The 300 has a built in DE450 network card (10MB). I've augmented that with a PCI DE500 100MB network card. My question is how I move DECnet off the old card (which is now disconnected) to the new card. I've tried running NETCONFIG but this doesn't seem to recognise the new card. The old card is EWA0: the new one EWB0: The remote booting and cluster server are running fine, so the machine boots OK off the new card, and I have reconfigured TCP/IP for the new card, it's just DECNET I'm stumbling with. The old card won't be connected to the network any more. Thanks for the help, Mark.