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Dell SmartFabric OS10 User Guide Release 10.5.3

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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

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