HP 445946-001 Application Manual page 45

In the configuration shown in the table above, Actor switch ports 18 and 19 aggregate to form an LACP
trunk group with Partner switch ports 1 and 2. At the same time, Actor switch ports 20 and 21 form a
different LACP trunk group with a different partner.
LACP automatically determines which member links can be aggregated and then aggregates them. It
provides for the controlled addition and removal of physical links for the link aggregation.
Each port in the HP 10GbE switch can have one of the following LACP modes.
off (default)—The user can configure this port in to a regular static trunk group.
active—The port is capable of forming an LACP trunk. This port sends LACPDU packets to partner
system ports.
passive—The port is capable of forming an LACP trunk. This port only responds to the LACPDU
packets sent from an LACP active port.
Each active LACP port transmits LACP data units (LACPDUs), while each passive LACP port listens for
LACPDUs. During LACP negotiation, the admin key is exchanged. The LACP trunk group is enabled as
long as the information matches at both ends of the link. If the admin key value changes for a port at
either end of the link, that port's association with the LACP trunk group is lost.
When the system is initialized, all ports by default are in LACP off mode and are assigned unique admin
keys. To make a group of ports aggregatable, you assign them all the same admin key. You must set the
port's LACP mode to active to activate LACP negotiation. You can set other port's LACP mode to passive,
to reduce the amount of LACPDU traffic at the initial trunk-forming stage.
Use the /info/l2/trunk command or the /info/l2/lacp/dump command to check whether the
ports are trunked.
NOTE:
If you configure LACP on ports with 802.1x network access control, make sure the ports on
both sides of the connection are properly configured for both LACP and 802.1x.
Ports and trunking
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