System Administration Guide: Network Interfaces and Network Virtualization

Requirements for Link Aggregations

Your link aggregation configuration is bound by the following requirements:

Certain devices do not fulfill the requirement of the IEEE 802.3ad Link Aggregation Standard to support link state notification. This support must exist in order for a port to attach to an aggregation or to detach from an aggregation. Devices that do not support link state notification can be aggregated only by using the -f option of the dladm create-aggr command. For such devices, the link state is always reported as UP. For information about the use of the -f option, see How to Create a Link Aggregation.