1) The user will not be able to communicate with the host without a DDP/IP
gateway for this reason:
A DDP/IP gateway is a device that takes the AppleTalk-encapsulated IP
packets from LocalTalk and decapsulates them. This device (such as the
FastPath) then broadcasts them onto Ethernet as IP packets. The AppleTalk
Internet Router is not a DDP/IP gateway and is not capable of this.
It is important to note that MacTCP 1.0 will not work across a router,
AppleTalk Internet Router included, if class C IP addressing is being used.
Class A and class B addressing work properly. If the user needs to use
Class C addressing, please contact us for a temporary fix.
2) If the Macintosh is on LocalTalk, the user will need a DDP/IP gateway as
explained above. If it is on Ethernet, the DDP/IP gateway is not needed.
The VAX running VMS needs to run a communications package that supports
TCP/IP. Digital Equipment Corporation distributes Network Research
Corporation FUSION TCP/IP and the Wollongong Group's WIN/TCP and WIN/TCP-DDN
through the Digital Distributed Software (DDS) program. Another example is
the TCP/IP software for VAX/VMS by Process Software.
You may want to contact DEC's DECdirect Prepurchase Technical Assistance or
Process Software departments directly. For more details, search the Technical
Info library under "Digital Equipment Corporation."