https://community.extremenetworks.com/t5/extremeswitching-other/k-series-sfp-port-usability/m-p/11944#M2972 Found the answer just after I posted. The answer is yes according to the K-6 Chassis Hardware Installation Guide<BR /> Tue, 10 Mar 2015 12:12:00 GMT Jack_Daniel 2015-03-10T12:12:00Z https://community.extremenetworks.com/t5/extremeswitching-other/k-series-sfp-port-usability/m-p/11943#M2971 Does the K-Series Fabric card support the use of the MGBIC part number transceivers for 1Gige connectivity? <BR /> I found the following but it only makes specific reference to the S-Series:<A href="https://community.extremenetworks.com/extreme/topics/s_series_10g_sfp_and_sfp_support" target="_blank" rel="nofollow noreferrer noopener">https://community.extremenetworks.com/extreme/topics/s_series_10g_sfp_and_sfp_support</A><BR /> <BR /> Tue, 10 Mar 2015 12:05:00 GMT https://community.extremenetworks.com/t5/extremeswitching-other/k-series-sfp-port-usability/m-p/11943#M2971 Jack_Daniel 2015-03-10T12:05:00Z https://community.extremenetworks.com/t5/extremeswitching-other/k-series-sfp-port-usability/m-p/11944#M2972 Found the answer just after I posted. The answer is yes according to the K-6 Chassis Hardware Installation Guide<BR /> Tue, 10 Mar 2015 12:12:00 GMT https://community.extremenetworks.com/t5/extremeswitching-other/k-series-sfp-port-usability/m-p/11944#M2972 Jack_Daniel 2015-03-10T12:12:00Z https://community.extremenetworks.com/t5/extremeswitching-other/k-series-sfp-port-usability/m-p/11945#M2973 Thanks for coming back to update <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span><BR /> Wed, 11 Mar 2015 00:22:00 GMT https://community.extremenetworks.com/t5/extremeswitching-other/k-series-sfp-port-usability/m-p/11945#M2973 Drew_C 2015-03-11T00:22:00Z