Transmit pairs are 3 and 6, and Receive are 4 and 5 for Token Ring RJ45
interfaces.
Fabricate a patch cable pinned out to the 568-B wiring standard on one end,
and change the other end to cross transmit an receive pairs.
End A
Pin 1 OrangeWhite
Pin 2 Orange
Pin 3 GreenWhite
Pin 4 Blue
Pin 5 BlueWhite
Pin 6 Green
Pin 7 BrownWhite
Pin 8 Brown
End B
Pin 1 OrangeWhite
Pin 2 Orange
Pin 3 BlueWhite
Pin 4 Green
Pin 5 GreenWhite
Pin 6 Blue
Pin 7 BrownWhite
Pin 8 Brown
That would provide a crossover patch cable for token ring to directly
connect two token ring devices.
Another approach, if you're interested, is to fabricate a loopback plug.
Use the same concept, but apply it to a single RJ45 plug. What you should
end up with is a plug that has one wire connecting pin 3 to pin 5, and pin 4
to pin 6. See if that will put your interface in to looped mode when you do
a show interface.
Hope this helps.
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=12072&t=11961
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