https://community.extremenetworks.com/t5/general-network-management/stack-of-ers-4900-and-5900/m-p/73303#M82 <P>Hi Emil, a&nbsp;stack can consist of any combination of switches from the same switch series and you can stack up to 8 units. All units in the stack must use the same software version.</P> Tue, 02 Mar 2021 23:42:12 GMT SamPirok 2021-03-02T23:42:12Z https://community.extremenetworks.com/t5/general-network-management/stack-of-ers-4900-and-5900/m-p/73302#M81 <P>Hi Geeks. Could&nbsp; I mix of ERS 4900 and 5900 series to same stack ?</P> Tue, 02 Mar 2021 07:03:35 GMT https://community.extremenetworks.com/t5/general-network-management/stack-of-ers-4900-and-5900/m-p/73302#M81 emil 2021-03-02T07:03:35Z https://community.extremenetworks.com/t5/general-network-management/stack-of-ers-4900-and-5900/m-p/73303#M82 <P>Hi Emil, a&nbsp;stack can consist of any combination of switches from the same switch series and you can stack up to 8 units. All units in the stack must use the same software version.</P> Tue, 02 Mar 2021 23:42:12 GMT https://community.extremenetworks.com/t5/general-network-management/stack-of-ers-4900-and-5900/m-p/73303#M82 SamPirok 2021-03-02T23:42:12Z