Possible issue with IBM OSA card and MTRJ port on Cisco 4506

[popasmuerf]

I have a memeber of my team who is trying to directly connect his 1GB OSA card to a 100Mb MTRJ port on our 4506. Not only can the two devices cannot ping one another, but there is no signa light on the 4506. I had an idea to connect the OSA card to the gbic uplink on our 3506 and everything worked just fine. I am starting to get the idea that the problem is that one or both devices is having issues with the bandwidth mismatch. I do remember this happening with a 1GB fiber card on a sun V440 behaving the same way when connected to a 3550 about 2 years ago.

Any one have any ideas or suggestions?

 

[popasmuerf]

Ok, I have connected the OSA card and a 3560 via the switches uplinks and they can talk okay. The uplinks and the OSA card are both running at 1 Gbit. I had the system programmer reduce the bandwith of the OSA card to 100Mbit/sec to match bandwidths with the MTRJ interface on the the 4506. I still get nothing. Could there be a problem with the duplex setting? I tried to get the MTRJ interface to be full duplex and still got nothing.

 

[popasmuerf]

Using a transceiver I proved that the the 3650's Gigabit ports could throttle down to the speed of the 100 Mbit 4560 MTRJ ports. Looks like the OSA card is the culprit.

 

[popasmuerf]

Using a transceiver I proved that the the 3650's Gigabit ports could throttle down to the speed of the 100 Mbit 4560 MTRJ ports. Looks like the OSA card is the culprit.