Link Aggregation (LAG) allows you to bond two or more ports in parallel to achieve greater throughput. LAG has the following properties:
- LAG provides automatic recovery when individual physical links fail. As long as at least one physical link exists, the LAG connection continues to exist.
- Data transmission is distributed as frames over the physical links.
- All frames forming part of a specific data communication packet are transmitted over the same physical connection, ensuring delivery of the individual frames of a data communication packet in the correct order, preventing disordering.
Barracuda Networks uses Mode 4 (802.3ad) bonding, known as Dynamic Link Aggregation mode. This mode creates aggregation groups that share the same speed and duplex settings, and requires a switch that supports IEEE 802.3ad Dynamic link.