The QoS feature enables you to define different levels of priority that can be set on Corente Services network traffic according to application, User Group, or specific Location-to-Location connection. This traffic is marked so that Corente Services Gateway Locations will obey the prioritization as well as any other device that follows a similar marking scheme. Corente Cloud Services Exchange utilizes both Differentiated Services Code Point (DSCP) and internal priority queuing to ensure traffic prioritization.
By default, App Net Manager provides a set of predefined QoS Entries. These are standard QoS classifications, but you can create custom QoS entries as well.
To view the QoS Entries currently defined in your domain, do the following:
Open the Quality of Service branch in the domain directory.
Click Quality of Service in the domain directory and view the table on the right side of the interface. This table displays the following:
QoS Entry: The name of the QoS Entry.
DSCP Value: The DSCP Value for the QoS entry.
Priority: The priority level for the QoS entry.
Permission: The Locations where the QoS entry can be used.
Default: Whether or not the QoS entry is a default service.
When performing any sort of QoS configuration, administrators must be careful when assigning QoS levels because if there is too much high priority traffic, any other traffic with a lower level of priority may become too slow or even be dropped.
You edit or delete an existing QoS Entry with the Edit and Delete buttons in the App Net Manager toolbar. You will be unable to delete a Default QoS Entry. While you cannot modify the definition of a Default QoS Entry, you can modify the Locations Using this Entry option. Changes made to a QoS Entry will change the personality configuration of any Locations using that particular QoS Entry. If you delete a QoS Entry currently in use by any of your Locations, the Locations will stop using the entry and must be assigned a new entry if you would like them to continue using QoS.
Add a New QoS entry
To define a Custom QoS entry, make sure Quality of Service is selected in the domain directory and do the following:
Select the New button in the toolbar.
From the File menu, select Add QoS Entry.
Right-click Quality of Service in the domain directory and select Add QoS Entry.
A blank Add QoS Entry window is displayed.
Complete the fields in this window as follows:
Name: Enter the name that this QoS entry will be called on screens in App Net Manager.
DSCP Value: Select the value that identifies how traffic associated with this QoS entry will be labeled for prioritization on devices within your network. Possible values are between 1 and 63. For example, on your network, all IP telephony traffic may be labeled as a "5" and your routers are configured to recognize this label and prioritize traffic accordingly.
Priority: Select the priority level that explains how the traffic associated with this DSCP entry will be prioritized between Locations (low, medium, or high). This enables you to assign certain traffic a DSCP Value of 5, for example, then further define that traffic by defining three separate QoS entries with a DSCP Value of 5 and a Priority level of either High, Medium, or Low. All High level traffic, no matter what DSCP level, will have the highest priority when sent between Locations, but may be prioritized differently within your network according to its DSCP Value.
Locations using this QoS Entry: Select one of the following choices in this section:
Allow All Locations to use QoS Entry: Select this option to allow this QoS entry to be enabled on traffic originating or terminating on any Location.
Allow only Selected Locations to use QoS Entry: Select this option if you would like to limit the use of this QoS entry to only specific Locations within your domain. This is the default. When this option is selected, you must choose the Locations in your domain that can enable this QoS entry on any of their defined applications, User Groups, or tubes, or else this entry is not available for use by any Locations. To choose Locations, select the checkbox beside each Location name in the Selected Locations list. The Select All button will select all the boxes in the list, and the Clear All button will clear your selections. You may permit as many Locations as you would like to use the QoS Entry.
When you are finished defining the QoS Entry, select the OK button to store your changes or the Cancel button to close the window without storing. Note that you must Save in order for any additions to take effect.
Enable QoS on an Application, User Group, or Tube
After you have assigned the use of QoS entries to Locations within your Corente Services network, you can enable these entries on the applications, User Groups, and tubes that you choose, on the Corente Services Gateways that you have allowed these entries to be used on. Corente Cloud Services Exchange allows separate prioritization choices for both inbound and outbound traffic. You cannot use QoS to prioritize traffic to or from a Corente Client.
Traffic that has been placed in similar priority queues (high, medium, or low) will be routed with the same prioritization within the Corente Services network.