Technical Tip: How to create an aggregate interface 802.3ad using two or more ports

802.3ad is an IEEE specification that allows combining multiple physical ports into one logical port. It is also known as the Link Aggregation Control Protocol (LACP). The benefits can be, but no limit to bandwidth increase, protection against anomalies, load balancing, and improvement to fault tolerance.

To create an aggregate interface, go to Network -> Interfaces:

If the physical interfaces are members of a Hardware/Software/VLAN Switch, remove the desired ones from it:

Once the physical interfaces are available, select Create New -> Interface:

Set the type to '802.3ad aggregate' and add the members to it:

Set the necessary configurations for the interface, like the name, Interface IP, Administrative Access, and DHCP Server:

After setting all the necessary configurations, select 'OK':

This will create the aggregate interface:

Example configuration in the CLI: 

config system interface
    edit "Aggregate_Test"
        set vdom "root"
        set type aggregate
        set member "internal5" "internal6"
        set device-identification enable
        set role lan
    next
end

Related article:

Technical Tip: Initial troubleshooting steps for LACP (Link Aggregation - 802.3ad)