Trust 802.1p/DSCP/IP Prec (ingress)

The Trust 802.1p/DSCP/IP Precedence (ingress) classification feature enables you to prioritize traffic across your network by honoring CoS markings already present in incoming packet headers. You can use this feature to classify trusted traffic into forwarding classes with assigned loss priorities based on IEEE 802.1p (Layer 2), DSCP, or IP precedence (Layer 3) code point bits, ensuring each packet receives the appropriate service level as it traverses the network. The classifier examines the relevant header field of each incoming packet and maps it to a forwarding class, which in turn determines the output queue and drop behavior. The goal is to deliver differentiated, consistent treatment to different classes of traffic end to end, without requiring inspection of multiple packet fields.