JJDAVIS@cc.utah.edu (09/05/90)
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@math.utah.edu (preferred) jjdavis@cc.utah.edu
n160ao@tamuts.tamu.edu (Mark Lehmann) (09/06/90)
In article <90473@cc.utah.edu> JJDAVIS@cc.utah.edu writes: >How can an IBM token ring LAN connect to an Ethernet broadband for TCP/IP >communication? All you need is to have both the Ethernet card and the Token ring card in one machine. Then give the ethernet card and the token ring card different network addresses. Alsom put in routing statements to forward messages from one network to the other. You may want to do this with nameserveing (but if this is the only sub-network that you have you may just want to do static routing, since setting up a nameserver can sometimes involve a lot of work). Mark Lehmann
drake@drake.almaden.ibm.com (09/06/90)
In article <90473@cc.utah.edu> JJDAVIS@cc.utah.edu writes: >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. Simplest is to put an Ethernet card and a Token Ring card in one of the RISC System/6000s. The 6000 will automagically act as an IP router. Have all the machines on one net point to that 6000 as their route to the other net, and vice versa. So, through the magic of TCP/IP, everyone will be completely unaware of what machines are on which network. Sam Drake / IBM Almaden Research Center Internet: drake@ibm.com BITNET: DRAKE at ALMADEN Usenet: ...!uunet!ibmarc!drake Phone: (408) 927-1861
kevin@msa3b.UUCP (Kevin P. Kleinfelter) (09/06/90)
JJDAVIS@cc.utah.edu writes: >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. Am I missing something??? Why not just put an Ethernet card and a token-ring card in one of your 6000s? In fact, even an RT can handle this, as I attended an IBM training class where 1/2 the lab was on Ethernet and 1/2 the lab was on TR, and there was an RT as a gateway between the two halves. We have a 6000 with both TR and ethernet (but I haven't gotten around to using the ethernet board yet!) -- Kevin Kleinfelter @ Dun and Bradstreet Software, Inc (404) 239-2347 {emory,gatech}!nanovx!msa3b!kevin "Don't hold your finger on the button if the motor ain't goin' roundy-roundy."
RAH@IBM.COM ("Russell A. Heise") (12/15/90)
JJDAVIS@cc.utah.edu writes: > How can an IBM token ring LAN connect to an Ethernet broadband for TCP/IP > communication? > > ... > > 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! > > ... > > Any other possibilites? Sure: try an 8209 LAN Bridge. This device looks like a PC/AT and can attach to both Token-Ring and Ethernet networks. On the Ethernet side, the bridge is transparent. On the TRN side, devices see it as a bridge to another Russ Heise, AIX Technical Support, IBM
sen@cs.columbia.edu (Soumitra Sengupta) (12/15/90)
Other possibilities for TCP/IP interconnection between Ethernet and TR: Put both Ethernet and TR cards in a S/6000 and configure it as a router; or Use a PC to do the same; Commercial (FTP, Wollongong, etc.) or free software are available; or We use a cisco router between Ethernet and the Token-Ring which works perfectly fine. IP routing (you can do other protocol routing also such as Novell IPX, AppleTalk, etc.) at Network layer is preferable to 8209 LAN bridging at the Link layer (unless I am wrong). Check the cisco out, we are a happy customer. sen
lindner@cs.umn.edu (Paul Lindner) (12/15/90)
In <121490.152426.heise1@ibm.com> RAH@IBM.COM ("Russell A. Heise") writes: > > How can an IBM token ring LAN connect to an Ethernet broadband for TCP/IP > > communication? > > > Sure: try an 8209 LAN Bridge. This device looks like a PC/AT and can attach > to both Token-Ring and Ethernet networks. On the Ethernet side, the bridge > is transparent. On the TRN side, devices see it as a bridge to another Or just slap an ethernet card and a token ring card in your RS/6000. That's what I've done here and it works for our needs, which are just telnet and ftp from PCs using NCSA telnet. I had to tell the network gurus that my RS/6000 was a gateway between the two nets and I had to set up static routes on the RS/6000 and on the PCs. Not too hard once you figure it out. Warning do not run routed or gated if you can avoid it. It caused me no end of headaches. Anyways static routes are faster and simpler! -- Paul Lindner, Univ. of MN \ Microcomputer / Pauls Law: You can't IT Sun dude, & UofM ACM pres \ Workstation / fall off the floor. lindner@boombox.micro.umn.edu \ Networks / {...!rutgers!umn-cs!lindner} | | | | | | | | |||||\ Center /||||| | | | | | | | |