Alloy GSS-8T2SFPV2, Руководство пользователя

Страница: 38 / 64

Fig. 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.
32