https://community.extremenetworks.com/t5/extremeswitching-vsp-fabric/error-this-mlt-is-used-for-legacy-mlt-vsp4900-48p/m-p/62822#M624 <P>Hi ongxc,</P><P>&nbsp;</P><P>LACP is not compatible with legacy MLT.</P><P>You must remove the ports from the MLT and you’ll be able to configure LACP.</P><P>&nbsp;</P><P>Here a sample config:</P><P><CODE>#Enable LACP active mode on LACP</CODE></P><P><CODE>#<BR /><BR /># MLT CONFIGURATION<BR /><BR />mlt 203 enable name ROUTER<BR /><BR />mlt 203 encapsulation dot1q<BR /><BR />interface mlt 203<BR /><BR />smlt<BR /><BR />lacp enable key 203<BR /><BR />exit<BR /><BR />#<BR /><BR /># VLAN CONFIGURATION<BR /><BR />vlan mlt 100 203<BR /><BR />...<BR /><BR />vlan mlt 246 203</CODE></P><P><CODE># PORT CONFIGURATION - PHASE II<BR /><BR />interface GigabitEthernet 2/3<BR /><BR />lacp key 203 aggregation enable<BR /><BR />lacp enable<BR /><BR />exit</CODE></P><P>&nbsp;</P><P>Mig</P> Tue, 05 Jan 2021 22:25:59 GMT Miguel-Angel_RO 2021-01-05T22:25:59Z https://community.extremenetworks.com/t5/extremeswitching-vsp-fabric/error-this-mlt-is-used-for-legacy-mlt-vsp4900-48p/m-p/62821#M623 <P>Hi, I am unable to enable LACP on my MLT links. The error is as below:</P><P>&nbsp;</P><P>Error: This MLT is used for legacy MLT</P><P>&nbsp;</P><P>Is this a limitation or did i miss out something? MLT works fine but i would like to further explore it with LACP. Thanks</P> Tue, 05 Jan 2021 17:07:10 GMT https://community.extremenetworks.com/t5/extremeswitching-vsp-fabric/error-this-mlt-is-used-for-legacy-mlt-vsp4900-48p/m-p/62821#M623 Xiao_CongO 2021-01-05T17:07:10Z https://community.extremenetworks.com/t5/extremeswitching-vsp-fabric/error-this-mlt-is-used-for-legacy-mlt-vsp4900-48p/m-p/62822#M624 <P>Hi ongxc,</P><P>&nbsp;</P><P>LACP is not compatible with legacy MLT.</P><P>You must remove the ports from the MLT and you’ll be able to configure LACP.</P><P>&nbsp;</P><P>Here a sample config:</P><P><CODE>#Enable LACP active mode on LACP</CODE></P><P><CODE>#<BR /><BR /># MLT CONFIGURATION<BR /><BR />mlt 203 enable name ROUTER<BR /><BR />mlt 203 encapsulation dot1q<BR /><BR />interface mlt 203<BR /><BR />smlt<BR /><BR />lacp enable key 203<BR /><BR />exit<BR /><BR />#<BR /><BR /># VLAN CONFIGURATION<BR /><BR />vlan mlt 100 203<BR /><BR />...<BR /><BR />vlan mlt 246 203</CODE></P><P><CODE># PORT CONFIGURATION - PHASE II<BR /><BR />interface GigabitEthernet 2/3<BR /><BR />lacp key 203 aggregation enable<BR /><BR />lacp enable<BR /><BR />exit</CODE></P><P>&nbsp;</P><P>Mig</P> Tue, 05 Jan 2021 22:25:59 GMT https://community.extremenetworks.com/t5/extremeswitching-vsp-fabric/error-this-mlt-is-used-for-legacy-mlt-vsp4900-48p/m-p/62822#M624 Miguel-Angel_RO 2021-01-05T22:25:59Z