Hirschmann MS30, Power MICE, MACH 4000, OCTOPUS, Руководство пользователя

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Traffic control
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8.4 Prioritization
Layer 2 Enhanced with Layer 2 Professional
Release 1.0 10/05
8.4 Prioritization
8.4.1 Description Prioritization
This function prevents high priority data traffic being disrupted by other traffic
during busy periods. The lower priority traffic will be discarded when the me-
mory or transmission channel is overloaded.
The Switch supports four priority queues (traffic classes in compliance with
IEEE 802.1D-1998). The assignment of received data packets to these clas-
ses depends on
D
the priority of the data packet contained in the VLAN tag (priority over port
priority).
D
the port priority for receiving the data packets that do not contain a tag
(see
“Configuring ports” on page 67 ).
The Switch offers for handling the priority classes:
D
Strict priority.
Entered
priority
Priority
class
0 1 - normal
1 0 - low
2 0 - low
3 1 - normal
4 2 - high
5 2 - high
6 3 - admin
7 3 - admin
Table 8: Assignment of the priorities listed in the tag to the four priority classes