Adding and Deleting Ports in a Load-Sharing Group
Ports can be added or deleted dynamically in a load-sharing group, or Load sharing group (LAG).

Note
When aggregator membership changes on a LAG, both redistribution of flows, as well as some traffic loss, may be expected.
To add or delete ports from a load-sharing group, use the
following commands:
configure
sharing port add ports port_list
configure
sharing port delete ports port_list