We will upgrade the core switch, I have actually a Catalyst 4006 and a Catalyst 6506 will replace it next month.
I will need to keep some fast Ethernet fiber links some months.
Do you know If I can use this card in Catalyst 6506-E:
WS-X4124-FX-MT Cisco Catalyst 4500 Fast Ethernet Switching Module, 24-Port 100BASE-FX (MT-RJ)
Thank you, best regards.