Users Guide

Table Of Contents
lacp fallback enable
Enables LACP fallback mode.
Syntax
lacp fallback enable
Parameters None
Default Disabled
Command Mode Port-channel INTERFACE
Usage
Information
The no version of this command disables LACP fallback mode.
Example
OS10# configure terminal
OS10(config)# interface port-channel 1
OS10(conf-if-po-1)# lacp fallback enable
Supported
Releases
10.3.2E(R3) or later
lacp fallback preemption
Enables or disables LACP fallback port preemption.
Syntax
lacp fallback preemption {enable | disable}
Parameters
enableEnables preemption on the port channel.
disableDisables preemption on the port channel.
Default Enabled
Command Mode Port-channel INTERFACE
Usage
Information
When you enable preemption, the fallback port election preempts the already elected fallback port and
elects a new fallback port.
The new port is elected based on the following events:
When a nonfallback port is configured with low priority.
When a low-priority port becomes operationally UP.
When a port with the least numbering is operationally UP.
If nondefault LACP port priority is configured on a port even though preemption is disabled, aport with
the lowest priority is elected as fallback port,
The lacp fallback preemption disable command is not applicable on port priority events
that you have configured or triggered.
Example
OS10# configure terminal
OS10(config)# interface port-channel 1
OS10(conf-if-po-1)# lacp fallback preemption enable
OS10# configure terminal
OS10(config)# interface port-channel 1
OS10(conf-if-po-1)# lacp fallback preemption disable
Supported
Releases
10.4.1.0 or later
464 Layer 2