Token ring to Ethernet?

[JJDAVIS at cc.utah.edu]

How can an IBM token ring LAN connect to an Ethernet broadband for TCP/IP
communication?

There is some interest in connecting several RISC/6000s together in a LAN
with token ring, but the LAN will also need to connect to the campus Ethernet
broadband.  The RISC/6000s will use the Internet protocol suite.

IBM's "TCP/IP Tutorial and Technical Overview" has diagrams (pp. 4-4,5-3)
showing a token ring LAN and an Ethernet LAN communicating through a 8232,
with IP routing taking place via a VM host attached to the 8232.  Seems
rather indirect, not to mention expensive!
   
DEC's "Networks and Communications Buyer's Guide" has a reference to
"802.3/Ethernet Adapters for IBM Shielded Twisted-pair Cabling", (p. 251 in
the 1989 July-December issue), but the entry isn't very clear.

Any other possibilites?

Jim Davis
Utah Supercomputing Institute
davis at math.utah.edu (preferred)
jjdavis at cc.utah.edu