Did you already try to upgrade your Switch firmware to 6.x and check if "service unsupported-transceiver" works for you on SFP and QSFP?
See below from Dell: http://en.community.dell.com/support-forums/network-switches/f/866/t/19581139.aspx
Did you already try to upgrade your Switch firmware to 6.x and check if "service unsupported-transceiver" works for you on SFP and QSFP?
See below from Dell: http://en.community.dell.com/support-forums/network-switches/f/866/t/19581139.aspx