Configure Ethernet Link Aggregation

On Fast Ethernet, Gigabit Ethernet, and 10-Gigabit Ethernet interfaces, you can associate a physical interface with an aggregated Ethernet interface. To enable the aggregated link, include the 802.3ad statement at the [edit interfaces interface-name fastether-options] or [edit interfaces interface-name gigether-options] hierarchy level:

802.3ad aex; 

You specify the interface instance number x to complete the link association; x can range from 0 through 127, for a total of 128 aggregated interfaces. You must also include a statement defining aex at the [edit interfaces] hierarchy level. For more information, see Configure Aggregated Ethernet Interfaces. You can optionally specify other physical properties that apply specifically to the aggregated Ethernet interfaces; for details, see Configure Ethernet Physical Interface Properties, and for a sample configuration, see Example: Configure Aggregated Ethernet Interfaces.