Hi,
If the downstream device (e.g. switch, server, etc..) is using LACP LAG sharing on its ports, it will be necessary to enable LACP LAG on the MLAG ports. This has to be done prior to enabling the port for mlag
enable sharing port grouping algorithm addressed-based [ L2 | L3 | L3_L4 ] lacp
(the algorithm needs to match the downstream device)