Prioritization; Description Prioritization - Hirschmann MS30, Power MICE, MACH 4000, OCTOPUS User Manual

Traffic control

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
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
The Switch offers for handling the priority classes:
D
Strict priority.
114
67).
Layer 2 Enhanced with Layer 2 Professional
8.4 Prioritization
Release 1.0 10/05