IEEE 802.3ad link aggregation enables you to group Ethernet interfaces to form a single, aggregated Ethernet interface, also known as a LAG or bundle. LAGs provide increased interface bandwidth and link availability by linking physical ports and load-balancing traffic crossing the combined interface. LACP provides a standardized means for exchanging information between partner (remote or far-end of the link) systems on a link.
With this feature, you can configure LAG on an SRX Series device using the links froman IOC2 or an IOC3 in Express Path mode.