Mastering pfSense

Link aggregation

Another option we should consider addressing is link aggregation, which can be configured by clicking on the LAGGs tab on the (assign) page. Link aggregation (usually abbreviated as LAG) allows us to combine multiple ports in parallel, which accomplishes two goals. It increases the amount of throughput (for example, if you have two trunk ports per switch, you will have more throughput than you would with a single port), and it also provides some redundancy in case one or more ports go down. The LAGGs option does not refer to an interface; rather, it refers to LAGG, the FreeBSD link aggregation and link failover driver. Typically, trunk ports involve some form of link aggregation; with some switches, trunks have to be configured ...