Administrator Guide

LACP Modes
Three LACP conguration modes are supported — O, Active, and Passive.
• O — In this state, an interface is not capable of being part of a dynamic LAG. LACP does not run on any port that is congured 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 congured 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.
LAGs are supported 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.
Conguring LACP Commands
If you congure aggregated ports with compatible LACP modes (O, Active, Passive), LACP can automatically link them, as dened in IEEE
802.3, Section 43.
To congure LACP, use the following commands.
• Congure 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.
• Congure LACP mode.
LACP mode
[no] port-channel number mode [active | passive | off]
• number: cannot statically contain any links.
The default is LACP active.
• Congure port priority.
LACP mode
[no] lacp port-priority priority-value
The range is from 1 to 65535 (the higher the number, the lower the priority).
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Link Aggregation Control Protocol (LACP)