Concept Guide

LACP Modes
Dell EMC Networking OS provides three modes for conguration of LACP — 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.
Dell EMC Networking OS 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.
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).
Link Aggregation Control Protocol (LACP)
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