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This is one of the last manufactured Token Ring card.
It has both RJ-45 and DB-9 output.
It works well, but the driver is somewhat buggy.
-The speed autodetection fails most of time, leaving the card unable to join communication. The easy workaround is to compile it as module and to give the module the speed arguement at load.
-On some kernel, "down-ing" the interface will cause an oops and the kernel network subsystem to stop responding (you will require a reboot). I haven't seen this since 2.4.X kernels but I don't use "ifconfig tr0 down" anymore either (setting IP to 0.0.0.0 has the same effect and it harmless). I haven't reported this.
-On newer kernel ( >2.6.8.1 ), on some machines, the drivers is causing an oops at load and cause the network subsystem to stop responding. I don't know what cause this exactly, on some computers, it runs fine on 2.6.11.10 and on some others I can't upgrade to any newer kernels than 2.6.8.1. I haven't reported this.
In conclusion, this card works fine but you might have to do some test and to ajust some bootup script. It is quite reliable once it is working but you have to keep an eye on it.
0000:00:0b.0 Token ring network controller: IBM 16/4 Token ring UTP/STP controller (rev 25)
Flags: bus master, medium devsel, latency 32, IRQ 7
I/O ports at 6200 [size=256]
Memory at f0001000 (32-bit, non-prefetchable) [size=256
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