Assigning a DSCP policy for a global TCP/UDP classifier

This global QoS packet-marking option assigns a previously configured or default DSCP policy (codepoint and 802.1p priority) to TCP or UDP packets having the specified port number or range of port numbers. When assigning a DSCP policy, the switch performs the following actions:

  1. Selects an incoming IP packet if the TCP or UDP port number it carries matches the port number specified in the TCP or UDP classifier.
  2. Overwrites (re-marks) the packet's DSCP with the new DSCP configured for matching packets.
  3. Assigns the 802.1p priority associated with the new DSCP.
  4. Forwards the packet through the appropriate outbound port queue.