Users Guide

LACP Modes
Dell Networking OS 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.
Dell 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.
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
The range is from 1 to 65535 (the higher the number, the lower the priority).
The default is 32768.
LACP Configuration Tasks
The following configuration tasks apply to LACP.
• Creating a LAG
• Configuring the LAG Interfaces as Dynamic
• Setting the LACP Long Timeout
• Monitoring and Debugging LACP
• Configuring Shared LAG State Tracking
Link Aggregation Control Protocol (LACP)
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