Lacp Port-Priority - Cisco Catalyst 3550 Command Reference Manual
Multilayer switch
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lacp port-priority
lacp port-priority
Use the lacp port-priority interface configuration command to set the port priority for the Link
Aggregation Control Protocol (LACP). Use the no form of this command to return to the default setting.
Syntax Description
priority-value
Defaults
The default priority value is 32768.
Command Modes
Interface configuration
Command History
Release
12.1(12c)EA1
Usage Guidelines
This command only takes effect on EtherChannel interfaces that are already configured for LACP.
The lacp port-priority interface configuration command determines which ports are bundled and which
ports are put in hot-standby mode when there are more than eight ports in an LACP channel group.
An LACP channel group can have up to 16 Ethernet ports of the same type. Up to eight ports can be active,
and up to eight ports can be in standby mode.
In port-priority comparisons, a numerically lower value has a higher priority: When there are more than
eight ports in an LACP channel-group, the eight ports with the numerically lowest values (highest
priority values) for LACP port priority are bundled into the channel group, and the lower-priority ports
are put in hot-standby mode. If two or more ports have the same LACP port priority (for example, they
are configured with the default setting of 65535) an internal value for the port number determines the
priority.
The LACP port priorities are only effective if the ports are on the switch that controls the LACP link.
Note
See the lacp system-priority global configuration command for determining which switch controls the
link.
Use the show lacp internal privileged EXEC command to display LACP port priorities and internal port
number values.
For more information about configuring LACP on physical interfaces, see the "Configuring
EtherChannels" chapter in the software configuration guide for this release.
Catalyst 3550 Multilayer Switch Command Reference
2-206
lacp port-priority priority-value
no lacp port-priority
Port priority for LACP. The range is 1 to 65535.
Modification
This command was introduced.
Chapter 2
Catalyst 3550 Switch Cisco IOS Commands
OL-8566-02
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