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Catalyst 2950 and Catalyst 2955 Switch Command Reference
OL-10102-01
Chapter 2 Catalyst 2950 and 2955 Cisco IOS Commands
lacp port-priority
lacp port-priority
Use the lacp port-priority interface configuration command to set the port priority for the Link
Aggregration Control Protocol (LACP). Use the no form of this command to return to the default setting.
lacp port-priority priority-value
no lacp port-priority
Syntax Description
Defaults The default priority value is 32768.
Command Modes Interface configuration
Command History
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.
Note The LACP port priorities are only effective if the ports are on the switch that controls the LACP link.
See the lacp system-priority global configuration command for determining which switch controls the
link.
Use the show lacp internal privileged EXEC command to 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.
Examples This example shows set the port priority for LACP:
priority-value Port priority for LACP. The range is from 1 to 65535.
Release Modification
12.1(12c)EA1 This command was introduced.
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