2501 - ethernet 0 duplex question

drew2000

Hey All,
I ran into an interesting issue this morning when trying out CDP. One of my switches was telling me (via CDP) that one of my routers is running at half duplex on ethernet 0.

So I logged on to the 2501, went to config-if, and tried "duplex full".

No luck, it tells me "this command is not supported for ethernet 0."

I am using a Centrecom AUI media transceiver connected to my 10/100 (auto neg) Verizon router/switch. I logged into the Verizon router/switch and could not find a way to view the speed and duplex results for each port to confirm the settings.

Any insight would be appreciated, I knew I would be limited to 10Mb, but I figured I would get full duplex from the 10 Base T connection.

Drew

mikej412

Nope -- the 2501 is old and back in those days 10Mb Ethernet was usually only half-duplex.

drew2000

Mike,
Thanks. I guess I thought in my head that any device that was table of 10 Base T was capable of either duplex mode. (because in my career it's all been 100 Base TX which can be either duplex, or 10 Base T devices that were capable of either.

Thanks for the info!

Drew

drew2000

Ok - that was dumb thought. Hubs only run in HALF duplex. I just have a case of weekend-brain I guess.

Thanks,
Drew

tiersten

You could get 10Mbps only switches.

drew2000

Thanks for the tip. Actually everything is communicating fine, so I'll stick with my setup for now. I was just trying to understand the reason for the half duplex and have a little fun troubleshooting with it.

Drew