Network Load Control
UM Basic Configuration L3P
Release
7.1
12/2011
8.4
QoS/Priority
175
8.4.5 Handling of Received Priority Information
The device offers three options, which can be selected for each port and
determine how it treats received data packets that contain a priority indicator.
trust dot1p
The device assigns VLAN-tagged packets to the different traffic classes
according to their VLAN priorities. The assignment is based on the pre-
defined table (see on page 169 “VLAN tagging”). You can modify this
assignment. The device assigns the port priority to packets that it receives
without a tag.
untrusted
The device ignores the priority information in the packet and always
assigns the packets the port priority of the receiving port.
trust ip-dscp
The device assigns the IP packets to the different traffic classes according
to the DSCP value in the IP header, even if the packet was also VLAN-
tagged. The assignment is based on the pre-defined values (see
table 16). You can modify this assignment.
The device prioritizes non-IP packets according to the port priority.
8.4.6 Handling of Traffic Classes
For the handling of traffic classes, the device provides:
Strict Priority
Weighted Fair Queuing
Strict Priority combined with Weighted Fair Queuing
Default setting: Strict Priority.
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