System Administration Guide: Network Interfaces and Network Virtualization

Policies and Load Balancing

If you plan to use a link aggregation, consider defining a policy for outgoing traffic. This policy can specify how you want packets to be distributed across the available links of an aggregation, thus establishing load balancing. The following are the possible layer specifiers and their significance for the aggregation policy:

Any combination of these policies is also valid. The default policy is L4. For more information, refer to the dladm(1M) man page.