Qtech QSW-8200-52T-AC [29/36] Preemption mode

User Manual

Chapter 4. Commands for ULPP 29

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 Switch(ulpp-group-20)# preemption delay 50

4.15 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

4.16 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

4.17 show ulpp flush counter interface

 Command: show ulpp flush counter interface {ethernet <IFNAME> | <IFNAME>}

 Function: Show the statistic information of the flush packets.

 Parameter: <IFNAME> is the name of the ports.