User Manual
Publication date: May, 2005
Revision A1
64
3-6. QoS(Quality of Service) Configuration
The
switch
offers 5 kinds of powerful 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 to meet 802.1p standard, IP TOS
Classification affected by TOS fields of IP header, TCP/UDP Port Classification and
IP DiffServe Classification act on DSCP field of IP Header.
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.
Fig. 3-16
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