Please click Trunking Link Aggregation Setting
There are two groups to choose and each group is 4 ports and the third group is for 2 ports.
This standard describes the Link Aggregation Control Protocol (LACP), a mechanism for allowing
ports on both sides of a redundant link to configure themselves into a trunk link (aggregate link),
without the need for manual configuration of the ports into trunk groups.
When you enable link aggregation on a group of Brocade ports, the Brocade ports can negotiate
with the ports at the remote ends of the links to establish trunk groups.