ExtremeXOS 30.3 now supports Fabric Attach client mode. Additionally, Fabric Attach server mode is supported over multi-switch link aggregation groups (MLAG).
For client mode: Summit X450-G2, X460-G2, X670-G2, X770, and ExtremeSwitching X440-G2, X465, X590, X620, X690, X870 series switches.
For server mode: Summit X670-G2, and ExtremeSwitching X465, X590, X690, X870 series switches.