PLANET WGSW-52040 - Manual (Page 784)

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link oscillation in a short time. After the preemption mode is enabled, the preemption delay takes effect.
Example:
Configure the preemption delay as 50s for ULPP group.
Switch(config)# ulpp group 20
Switch(ulpp-group-20)# preemption delay 50
53.15 preemption mode
Command:
preemption mode
no preemption mode
Function:
Enable/disable the preemption mode of ULPP group.
Parameter:
None.
Default:
Do not preempt.
Command mode:
ULPP group configuration mode.
Usage Guide:
If the preemption mode configured by ULPP group, and the slave port is in forwarding state, and the master port is in
the standby state, the master port will turn into the forwarding state and the slave port turn into the standby state after
the preemption delay.
Example:
Configure the preemption mode of ULPP group.
Switch(config)# ulpp group 20
Switch(ulpp-group-20)# preemption mode