i have catalyst express 500 switch with transceivers modules GLC-SX-MM, 1000BASE-SX SFP.
Is possible to change the speed of this transceivers to 100Mbit?
... i need it know, because on other side of link is a opical/metallic converter ( AT-MC101XL
Fast Ethernet 100BASE-TX to 100BASE-FX (ST) Multi-Mode Fibre (2km), Stand-Alone Media Converter)
I think converter and tranciever are not compatible. Isn`t it?
Unfortunately, the GLC-SX-MM is not switchable to 100Mb operation. You need to purchase a 100Base-FX SFP module for your switch.
According to the following document, these are the 100Mb interfaces compatible with the Express 500:
This document details the interop and specifications of these SFPs:
Cisco Small Form-Factor Pluggable (SFP) Transceiver Modules Maintenance and Troubleshooting
Hope this helps!