Zap the PRAM on the 7100, that fixes most Appletalk related problems. Use Localtalk Bridge on the 7100 (set Appletalk to the Printer Port) to route packets between the Localtalk and Ethernet segments. MacIPgw takes care of the TCP/IP routing/encapsulation. Note, you may need to set a static route on your router in order for it to work correctly.
For those wondering, the Appletalk Internet Router package has nothing to do with TCP/IP or MacIP.
For those wondering, the Appletalk Internet Router package has nothing to do with TCP/IP or MacIP.