I am trying to finish up a job replacing some very old Cisco 3750's with a new stack of Extreme Summit 450-G2 switches running ExtremeXOS version 126.96.36.199.
I have four devices left that are giving me problems. One of them will only connect at 100 megs HALF duplex. I know that is an issue, because the Summit will not let me force half duplex on a port. It seems I need to buy a special device
from Extreme that will emulate half-duplex for old devices. That's fine!
But I have three other devices (in some way related to MRI machines) that are currently negotiating and connecting to my Cisco switch just fine at 100 megs full duplex. When I try to move them to my Extreme switch - they won't connect and work reliably.
If I do this ... "conf port 2:1 auto off speed 100 duplex full" the device will connect, but will flap. I see a flicker of a link light, and then nothing for 3 seconds or so ... then the process repeats. If I do this ... "conf port 2:1 auto on speed 100 duplex full" the device will connect at 100 megs full duplex and seems to work. However, if I run a constant ping to the device, I am dropping every 10th packet. If I plug it back into the Cisco switch, it happily connects at 100 megs Full Duplex and no packets are dropped.
I am down to a handful of these and I am hoping that the Half-Duplex to Full-Duplex Converter device fixes all my issues. But seeing how only one of these is really half-duplex, I have my doubts.
Has anyone experienced problems like this, and have an easy solution?
Another fun note - one of these devices had a home-made cable connecting it to the switch, with the strangest pin-out I have ever seen.