Draytek VigorSwitch G2080 - 2.5 QoS(Quality of Service) Configuration

VigorSwitch G2080 User’s Guide
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packet limits to unicast, broadcast and multicast. Valid range
is 0~1000.
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The switch offers powerful 5 kinds of QoS functions. There are Per Port Priority that you
can assign each port to different precedence, VLAN Tag priority that can make precedence
of 8 priorities, IP TOS Classification, IP TCP/UDP Port Classification and IP DiffServe
Classification.
In Quality of Service (QoS) Configuration, there is one option named” Default Class”. As
you had selected one of the five QoS functions, then some packets that did not belong to
this QoS setting would be viewed as Default Class. For instance, if you set QoS function as
VLAN Tag Priority mode, and then choose Default Class as High, finally, the priority of
the packets with no tag will be considered as High priority precedence. The initial value
of the Default Class is High.