Mapping 802.1p Priority

The IEEE 802.1p feature allows traffic prioritization at the MAC level. The switch can prioritize traffic based on the 802.1p tag attached to the Layer 2 frame. Each port on the switch has multiple queues to give preference to certain packets over others based on the CoS (Class of Service) criteria you specify. When a packet is queued for transmission in a port, the rate at which it is serviced depends on how the queue is configured and possibly the amount of traffic present in the other queues of the port. If a delay is necessary, packets get held in the queue until the scheduler authorizes the queue for transmission.

Use the 802.1p Priority Mapping page in the Class of Service folder to assign 802.1p priority values to various traffic classes on one or more interfaces.

To access this page, click Switching > Class of Service > 802.1p in the navigation menu.

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802.1p Priority Mapping

Field Description
Interface The interface associated with the rest of the data in the row. The Global entry represents the common settings for all interfaces, unless specifically overridden individually.
Priority The heading row lists each 802.1p priority value (0–7), and the data in the table shows which traffic class is mapped to the priority value. Incoming frames containing the designated 802.1p priority value are mapped to the corresponding traffic class in the device.
802.1p Priority The 802.1p priority value to be mapped.
Traffic Class The internal traffic class to which the corresponding 802.1p priority value is mapped. The default value for each 802.1p priority level is displayed for reference.