Trust Mode Configuration; Table 212: 802.1P Priority Mapping - D-Link DWS-4026 User Manual

D-Link Unified Access System
Field
Slot/Port
802.1p Priority
Traffic Class
• If you make any changes to the page, click Submit to apply the new values to the system.
T M C
RUST ODE ONFIGURATION
Use the Trust Mode Configuration page to set the class of service trust mode of an interface. Each port in the switch can be
configured to trust one of the packet fields (802.1p or IP DSCP), or to not trust any packet's priority designation (untrusted
mode). If the port is set to a trusted mode, it uses a mapping table appropriate for the trusted field being used. This mapping
table indicates the CoS queue to which the packet should be forwarded on the appropriate egress port(s). Of course, the
trusted field must exist in the packet for the mapping table to be of any use, so there are default actions performed when this
is not the case. These actions involve directing the packet to a specific CoS level configured for the ingress port as a whole,
based on the existing port default priority as mapped to a traffic class by the current 802.1p mapping table.
Alternatively, when a port is configured as untrusted, it does not trust any incoming packet priority designation and uses the
port default priority value instead. All packets arriving at the ingress of an untrusted port are directed to a specific CoS queue
on the appropriate egress port(s) in accordance with the configured default priority of the ingress port. This process is also
used for cases where a trusted port mapping is unable to be honored, such as when a non-IP packet arrives at a port
configured to trust the IP precedence or IP DSCP value.
To display the Trust Mode Configuration page, click LAN > QoS > Class of Service > Trust Mode Configuration in the
navigation menu.
Page 336 Configuring Class of Service

Table 212: 802.1p Priority Mapping

Description
Selects the interface to which the class of service configuration is applied.
Displays the 802.1p priority to be mapped. Priority goes from low (0) to high (7). For
example, traffic with a priority of 0 is for most data traffic and is sent using "best effort."
Traffic with a higher priority, such as 6, might be time-sensitive traffic, such as voice or
video.
The traffic class is the hardware queue for a port. Higher traffic class values indicate a
higher queue position. Before traffic in a lower queue is sent, it must wait for traffic in
higher queues to be sent. To change the default priority-to-queue mapping, select a
new traffic class value from the drop-down menu.
Software User Manual
Document 34CSFP6XXUWS-SWUM100-D7
12/10/09