Reference Guide

NOTE: There is no configuration on the interface because that condition is required for an
interface to be part of a LAG.
• You can configure link dampening on individual members of a LAG. For more information, refer to Link Debounce
Timer.
LACP Modes
FTOS provides three modes for configuration of LACP — Off, Active, and Passive.
• Off — In this state, an interface is not capable of being part of a dynamic LAG. LACP does not run on any port
that is configured to be in this state.
• Active — In this state, the interface is said to be in the “active negotiating state.” LACP runs on any link that is
configured to be in this state. A port in Active state also automatically initiates negotiations with other ports by
initiating LACP packets.
• Passive — In this state, the interface is not in an active negotiating state, but LACP runs on the link. A port in
Passive state also responds to negotiation requests (from ports in Active state). Ports in Passive state respond
to LACP packets.
FTOS supports LAGs in the following cases:
• A port in Active state can set up a port channel (LAG) with another port in Active state.
• A port in Active state can set up a LAG with another port in Passive state.
A port in Passive state cannot set up a LAG with another port in Passive state.
Configuring LACP Commands
If you configure aggregated ports with compatible LACP modes (Off, Active, Passive), LACP can automatically link them,
as defined in IEEE 802.3, Section 43.
To configure LACP, use the following commands.
• Configure the system priority.
CONFIGURATION mode
[no] lacp system-priority priority-value
The range is from 1 to 65535 (the higher the number, the lower the priority).
The default is 32768.
• Enable or disable LACP on any LAN port.
INTERFACE mode
[no] port-channel-protocol lacp
The default is LACP disabled.
This command creates context.
• Configure LACP mode.
LACP mode
[no] port-channel number mode [active | passive | off]
– number: cannot statically contain any links.
The default is LACP active.
• Configure port priority.
LACP mode
[no] lacp port-priority priority-value
370