Using QoS to optimize existing network resources

By prioritizing traffic, QoS supports traffic growth on the network while optimizing the use of existing resources—and delaying the need for further investments in equipment and services. QoS enables you to:
  • Specify which traffic has higher or lower priority, regardless of current network bandwidth, or the relative priority setting of the traffic when it is received on the switch.

  • Change (upgrade or downgrade) the priority of outbound traffic.

  • Override "illegal" packet priorities set by upstream devices or applications that use 802.1Q VLAN tagging with 802.1p priority tags.