PLANET XGS3-24040 - Manual (Page 830)

Commands for Reliability Chapter 4 Commands for ULPP
57-5
57.12 preemption delay
Command: preemption delay
no preemption delay
Function: Configure the preemption delay, the no command configures the preemption delay as the
default value.
Parameter: : the preemption delay, range from 1 to 600, in second.
Default: The default preemption delay is 30.
Command mode: ULPP group configuration mode.
Usage Guide: The preemption delay is the delay time before the master port is preempted as the
forwarding state, for avoiding the 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
57.13 preemption mode
Command: preemption mode
no preemption mode
Function: Open/close 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
57.14 protect vlan-reference-instance
Command: protect vlan-reference-instance
no protect vlan-reference-instance
Function: Configure the protective VLANs of ULPP group, the no command cancels the protective
VLANs.
Parameter: is MSTP instance list, such as: i; j-k. The number of the instances is not
limited in the list.
Default: Do not protect any VLANs by default that means any instances are not quoted.
Command mode: ULPP group configuration mode.