Managing Switches
Configuring Switch Features
| Figure |
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N o t e | The Quality of Service features available in HP TopTools for Hubs & Switches |
| includes the ability to set up consistent traffic prioritization (Class of Service) |
| policies across the Procurve switches in your network. The Class of Service |
| features can also be configured on an individual switch using the switch's |
| console or web browser interface. HP Procurve documentation uses Quality |
| of Service (QoS) to refer to HP TopTools |
| Class of Service (CoS) to refer to prioritization configured on an individual |
| switch (using the switch's web browser or console interface). |
| Using VLANs to Maximize the CoS Benefit |
| |
| Without an 802.1Q tagged VLAN environment, CoS can prioritize only the |
| movement of outbound traffic through individual Procurve switches in your |
| network. Using 802.1Q tagged VLANs provides the maximum advantage by |
| allowing CoS to set priorities that are supported by downstream devices. This |
| means that CoS can support improved performance for present traffic levels |
| as well as future traffic growth while optimizing the use of existing resources |
| and delaying the need for further investments in equipment and services. That |
| is, CoS enables you to: |
| ■ Specify which traffic in the switch 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. |