Digitus 16 PORT GIGABIT ETHERNET NETWORK SWITCH, Руководство пользователя

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User Manual
Function name:
DSCP QoS Mode
Function description:
In the late 1990s, the IETF redefined the meaning of the 8-bit SERVICE TYPE
field to accommodate a set of differentiated services (DS). Under the
differentiated services interpretation, the first six bits comprise a codepoint,
which is sometimes abbreviated DSCP, and the last two bits are left unused.
DSCP can form total 64 (0~63) kinds of Traffic Class based on the
arrangement of 6-bit field in DSCP of the IP packet. In the switch, user is
allowed to set up these 64 kinds of Class that belong to any of queue (low,
normal, medium, high).
Parameter description:
Prioritize Traffic
Five Prioritize Traffic values are provided: Custom, All Low Priority, All
Normal Priority, All Medium Priority, and All High Priority.
The QoS setting would apply to all ports on the switch if one of the
following values is selected: All Low Priority, All Normal Priority, All
Medium Priority, or All High Priority.
Port Number
When Custom is selected for Prioritize Traffic, you may assign specific
Port Number for DSCP Configuration.
DSCP Configuration:
64 kinds of priority traffic as mentioned above, user can set up any of
Queue (low, normal, medium, high). In default, Priority 0~63 are mapping
to Queue high.
Fig. 4-23 DSCP Setting
Publication date: Septembery, 2007
Revision A3
76