Little helpful tidbit.

Setting up an LACP aggregate on an Extreme switch in the CLI is a piece of cake.

# enable sharing X grouping Y-Z lacp

Where X is the first or ‘master’ port in the aggregate, and Y-X are the ports that will be included in the aggregate.  (Y should be the same as X in most cases).

Remember to save, and if your LACP partner on the other end is already configured, you’ll see that everything is up!