Hirschmann MACH 4000 Series, User Manual

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Traffic control
142
8.4 Prioritization
Basic - L3P
Release 3.1 06/07
8.4.4 Handling of received priority information
The Switch provides three options for selecting how it handles received data
packets that contain priority information.
D
trust dot1p
The Switch assigns VLAN-tagged packets to the different priority classes
according to their VLAN priorities. The assignment is based on the pre-
defined table (see
“Tagging” on page 136 ). You can modify this assign-
ment.
D
no trust
The Switch does not trust the priority information in the packet and always
assigns the packets the port priority of the receiving port.
D
trust ip-dscp (MACH 4002-24G/48G)
The Switch assigns the IP packets to the different priority classes accord-
ing to the DSCP value in the IP header, even if the packet was also VLAN-
tagged. The assignment is based on the pre-defined
table 11 on
page 141 . You can modify this assignment.
8.4.5 Handling of priority classes
For the handling of priority classes, the Switch provides:
49-55 6
56 CS7 7
57-63 7
DSCP Value DSCP Name Priority Class
(default setting)
Table 11: Mapping the DSCP values onto the priority classes