An LACP trunk can only go to a single controller at a time, but the swich links should conect to more than one switch. For Cisco, this means using a pair of switches configured using VPC so they are a single logical switch.
So, in your instance, with 6 nodes, each node could/would have an LACP configuration with 2 links going to switch A and 2 going to switch B. This would be a total of 24 ports (12 on each switch in the VPC).
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