PLANET XGS3-24042 - Manual (Page 1101)

63-8
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
63.14 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
63.15 show ulpp flush counter interface
Command: