Port trunk features and operation
The switches covered in this guide offer these options for port trunking:
LACP: IEEE 802.3ad—Trunk group operation using LACP
Trunk: Non-Protocol—Trunk group operation using the "trunk" option
Up to 144 trunk groups are supported on the switches. The actual maximum depends on the number of ports available on the switch and the number of links in each trunk. (Using the link aggregation control protocol—LACP—option, you can include standby trunked ports in addition to the maximum of eight actively trunking ports.) The trunks do not have to be the same size; For example, 100 two-port trunks and 11 eight-port trunks are supported.
LACP requires full-duplex (FDx) links of the same media type (10/100Base-T, 100FX, and so on) and the same speed, and enforces speed and duplex conformance across a trunk group. For most installations, Hewlett Packard Enterprise Switch recommends that you leave the port Mode settings at
Auto (the default). LACP also operates with
Auto-10,
Auto-100, and
Auto-1000 (if negotiation selects FDx), and
10FDx,
100FDx, and
1000FDx settings. (The 10-gigabit ports available for some switch models allow only the
Auto setting.)