So, verify that your Physical is up on ports 3 and 4. Verify the sharing is up on 3 and 4. If both are up then I would look to change the algorithm of the share to L2 or L3 and see if the MLAG comes up.
thanks for the reply,
i have tried to configure the same on both Core EXOS1 and EXOS2
here's a sample
EXOS1: enable mlag port 1 peer "core" id 1
EXOS2: enable mlag port 1 peer "core" id 1
and the lag on downstream device
but usually we when i configure mlag kind of technology, like Dell VLT and cisco vPC, once we config is complete, without configuring the MLAG ports, (which are connected to downstream device) the status shows as up.
is it different on EXOS?
sorry if that seem naive, but im totally new to Extreme switches.