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39.13 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
39.14 protect vlan-reference-instance
Command: protect vlan-reference-instance <instance-list>
no protect vlan-reference-instance <instance-list>
Function: Configure the protective VLANs of ULPP group, the no command cancels the
protective VLANs.
Parameter: <instance-list> 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.
Usage Guide: Quote the instances of MSTP to protect the VLANs. The VLAN
corresponds to this instance is at the forwarding state on one port of this group, and at the
blocked state on another port of this group. Each ULPP group can quotes all instances of
MSTP. And it can quotes the inexistent MSTP instances that means any VLANs are not
protected, the different ULPP groups can‘t quote the same instance.
Example: Configure the protective VLAN quoted from instance 1 for ULPP group.
Switch(config)# ulpp group 20
Switch(ulpp-group-20)# protect vlan-reference-instance 1