user manual

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. 3.12a
• Function Name: VLAN Tag Priority
• Function VLAN tags have 3 bits that belong to a priority flag.
Description: These 3 bits can define 8 traffic classifications. The classifications can
then be mapped to ‘High priority’ or ‘Low ‘ priority queues. Packets
tagged as High priority will be forwarded over packets with a low
priority when the destination port is in a congested state
• Parameter Quality of Service (QoS) VLAN Tag Configuration:
Description: * Used for setting up QoS based on VLAN tags.
Port:
* Select the port which your bit mapping will apply.
Optionally you can select to control all ports at the same
time from the “All” selection.
Bit 0, Bit 1, Bit 2:
* Controls the Tag priority and offers 8 levels of QoS.
Class:
* The 8 levels of QoS are then mapped to High or Low
Priorities for each ports output queue respectively.
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