[HECnet] SIMH + Multiple interfaces + DECnet

[Paul_Koning at Dell.com]

On Dec 28, 2012, at 4:44 PM, Johnny Billquist wrote:

...
Yes, VMS can route packets. Yes, all ethernet interfaces under DECnet phase IV will have the same MAC address. No, VMS have no idea of the concept of a bridge. And if you bridge two ethernet segments together, and VMS sits on both those segments, bad juju happens.

Actually, DEC nodes are quite aware of bridging -- DEC after all invented LAN bridging.   The thing that you have to get right is that the multiple DECnet phase IV interfaces *must* be on distinct extended LANs.   The changed MAC addresses are the reason why.

This changes with Phase V, since that doesn't change the MAC address (if it doesn't have to be Phase IV compatible, that is).   Also, unlike Phase IV, Phase V supports end nodes with more than one interface.

	paul