QoS IP Type-of-Service (ToS) policy and priority Global QoS classifier precedence: 3 Assigning an 802.1p priority to IPv4 packets on the basis of the ToS precedence bits Assigning an 802.1p priority to IPv4 packets on the basis of incoming DSCP Assigning a DSCP policy on the basis of the DSCP in IPv4 packets received from upstream devices Details of QoS IP ToS