Hi,
this is the typical minimal MLAG config.
# Name of the other MLAG peer, to distinguish if several MLAG peers are present
create mlag peer "CORE-A"
# IP address of the remote peer on the ISC vlan. Must not be routed
configure mlag peer "CORE-A" ipaddress 199.199.199.1 vr VR-Default
# the MLAG Id per port, must be identical on each MLAG peer for the same end-system
enable mlag port 10:48 peer "CORE-A" id 10
enable mlag port 10:47 peer "CORE-A" id 20
You also need to have the ISC vlan created with the correct IP address and all the necessary LAG created (10:48, 10:47) with LACP if needed.
Best Regards,
Stephane