I install new core infrastructure based on Extreme Summit switches and right now I'm feel some uncertainty about the course of action. That's what I have.
In the core we have two standalone X670 switches acting like a MLAG peers. To these switches I connect two stacked X460-48 (USERS) switches (at the top of picture) and two stacked X460-24 (SERVERS) switches (in the bottom of picture). USERS switches have 2 uplinks to the MLAG peers and SERVERS switches have 4 uplinks to the MLAG peers.
USERS switches work good but my SERVERS switches lost connection.
STP is turned off on all six switches.
How to properly configure mlag ports on X670 switches to connect SERVERS switches?
It seems I tried all possible configuration and connections between CORE and SERVERS switches but there's no result.
Please type right set of commands for CORE and SERVERS switches.