Users Guide

lacp fallback preemption
Enables or disables LACP fallback port preemption.
Syntax
lacp fallback preemption {enable | disable}
Parameters
• enable—Enables preemption on the port channel.
• disable—Disables 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
lacp fallback timeout
Configures LACP fallback time-out period.
Syntax
lacp fallback timeout timer-value
Parameters timer-value—Enter the timer values in seconds, ranging from 0 to 100 seconds.
Default 15 seconds
Command Mode Port-channel INTERFACE
Usage Information The no version of this command returns the timer to default value.
Example
OS10# configure terminal
OS10(config)# interface port-channel 1
OS10(conf-if-po-1)# lacp fallback timeout 20
Supported
Releases
10.3.2E(R3) or later
lacp max-bundle
Configures the maximum number of active members that are allowed in a port channel.
Syntax
lacp max-bundle max-bundle-number
Parameters max-bundle-number — Enter the maximum bundle size (1 to 32).
Default 32
382 Layer 2