Setting up a token ring network.

Evadman

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Lord Evermore

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It all connects just like an Ethernet network. :) Current token ring is a "star-ring" topology, Ethernet is a star-bus technology. The ring part only comes into effect in the protocol and the way the hub works, the layout is still a star.

The bridge should just plug right into the Ethernet network, and IP protocol can run over token ring so the bridge is just changing the signalling to the bus and back to ring; they'll be two different network segments of course.
 

Evadman

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I picked up a bunch of cabling as well because I was not sure if the wireing was the same from ethernet to token ring. is it? meaning, are the cables interchangable? or will I have to mark all the cables I got? (regular rj-45 connectors on what sure looks like cat5 cabling)
 

ScottMac

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No too hard, actually. There's just a couple absolute rules: the ring must be terminated (as in, not open) and the parameters must agree (16Meg, or 4 Meg).

With 16meg, you'll probably have have Early Token Release on by default, it's a good thing.

You don't mention any Token Ring NICs ... Madge is very popular (personally, I hate 'em), 3COM, IBM, Olicom, SysKonnect are all very good.

If you're using UTP ( it looks like you are), then watch to make sure the ring is terminated (probably a switch or loopback on the RJ45 MAU). The termination point is usually the "Ring In" and "Ring out" ports (RI / RO). If those are RJ45 jacks, then they probably aren't self-terminating like the traditional IBM Data Connector (the goofy boy-george self-mating monsters designed by IBM) and may need loopback plugs if there aren't any "wrap" switches.

It should work womething like this: When the NIC initializes, it sends itself a batch of tokens (self test) so it's important that the cable (especially UTP) be plugged in (again, the original "Adapter Cable" was self-shorting, so if it wasn't plugged in, it looped back to itself).

Then (assuming the self-test went OK) the NIC shoots a bunch of traffic onto the ring. At the end of that sequence, the NIC knows it's address is unique, and it knows who the neighbors are (at least the Nearest Upstream Active Neighbor (NUAN)).

After that dance is finished, and everything has happened as it's s'posed to, the NIC is now fully initialized and ready to start talking. All of the switching, signalling states, insertion, etc is done by manipulating some phantom voltages.

If something doesn't happen right, the NIC won't initialize and you'll get some flavor of failure message.

The UTP cabling is the same as Ethernet (uses different pair than Ethernet (3,4 & 5, 6)) but 16 meg TR only needed Cat 4.

The STP cables were: The "Adapter Cable" - DB9 at one end, Data conenctor at the other, and "Patch cable" - data connector at each end. The DB9 uses the two pairs of outside pins (like 1&6, 5&9). All of the STP cables were straight-through. There *was* a cross-over cable, used ONLY for certain switch/mau combinations - you CANNOT go PC-to-PC with token ring, you *MUST* use a MAU, CAU, switch, bridge ....

Token Ring actually works pretty well. You'll probably like it.

When you get some specific questions, put 'em up. I know there's some old ring-heads still floating around. I've put in thousands of TR nodes ... once you get used to it, it doesn't suck.

Good Luck & Have fun

Scott
 

Evadman

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so, are ethernet cables and token ring cables identical electricly?

Originally posted by: spidey07
The year is 2003.

Thou shalt not create more rings.

Quiet you! :p
 

spidey07

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Aug 4, 2000
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:)

Sorry, I spent most of the latter part of the 90s ripping it out.

A good amount of our campus is running 100 Base-T on Type-1 cable.
 

ScottMac

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so, are ethernet cables and token ring cables identical electricly?

Yes.

UTP Token-Ring cables are the same as UTP Ethernet cables ... but Token Ring uses different pair. If you are using at least Cat4, all eight conductors terminated (like a regular patch cable), it'll work fine.

Spidey: With all that type 1 carrying your network traffic, it's easy to see why you have such a solid & reliable network ... it is far superior to ANY UTP ya know......:D (I think coax still beats Type 1 though).

FWIW

Scott


 

TJN23

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May 4, 2002
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my school ran a token ring 16Mbps network last year, and it was horrible. the card was 300 bucks :)Q) and now its collecting dust
 

mboy

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Jul 29, 2001
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Why r u wasting your time even messing with it.
Like trying to install XP on a PII 200 with 64mb of pc100 ram :)
 

azev

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Knowledge is power man, but spending that much money (according to the link) for an outdated equipment is a bit waste of money IMHO. I think you'd be better of getting some FDDI equipment since they still use that today.
 

ScottMac

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Token Ring is still being purchased and installed (in new installations).

Hard to believe I know, but I have personal knowledge of at least three large-to-enterprise sized places putting it in (because they WANT TO, not because they HAVE to).

In this tight market, being able to demonstrate knowledge of diverse technologies can be a good thing (IMHO).

FWIW

Scott