I am working with an Extreme Networks switch x450e. I am trying to configure a 10/100/1000 Mbps RJ45 Copper SFP (Startech--Model# SFPC1110) to 100 Mbps full duplex but it doesn't seem to allow me to change it to 100 Mbps.
I get an error message on the switch to the effect of "Error: Auto negotation is not support on port <port>." and no link. If I use a 1000 Mbps device I get link fine.
From what I can find on the internet the official Extreme Networks copper GBIC's DO support changing it to 100Mbps full.
My question is am I doing something wrong or are the Extreme Networks GBIC's proprietary? I know the Startech GBIC's are MSA compliant and the Extreme Networks switches are MSA compliant but apparently that isn't enough.
What is different that doesn't allow it to work? I tried another brand of GBIC and had the same issue. I am really trying to find what and why it will not work or what I am doing incorrectly since the official GBIC's are more than twice the cost.