Defining the Quality of Service

The
AADvance-Trusted SIS Workstation software®
 provides the option of specifying the priority of IP traffic for different applications. The Quality of Service feature ensures high priority services are not delayed during periods of network congestion. Set the priority for up to 16 services. When using the Quality of Service, also enable TCP negotiation.
cmv_dqs
TIP: When the Quality of Service feature is enabled, the scan rate of the controller may differ by five milliseconds.
When enabled, the service uses bit patterns in the "DS-byte" of IP, which is the Type-of-Service (ToS) octet for IPv4. When defining the quality of service, set the priority of applications as high, medium, low, or as a value ranging from 0 to 255.
To set the service, arrange routers and switches able to inspect IP headers and prioritize them by the ToS header octet. The network devices then apply the rules to prioritize the IP traffic. The AADvance controller maintains the priority when responding to incoming messages. Outgoing messages are sent out according to the set priority defined in the Quality of Service.
IMPORTANT: When using all 8 bits of the ToS byte, the networking equipment may interpret the packet incorrectly. To avoid issues, it is recommended to use a maximum value of 252 for ToS.
To define the quality of service
For TCP, each service using the same port must have a different peer address. For UDP, each service must use a different port. The same port number may be used for both protocols.
  1. In the Communication View, expand the required controller, and then double-click
    Quality of Service
    .
    The Communication property page displays.
  2. In the property page, select
    Enable Quality of Service
     to enable the feature.
  3. If TCP negotiation is required, select
    Enable TCP Negotiation
    .
  4. In the table, set the values for the
    Protocol
    ,
    Port
    , and
    ToS
     for each required service. If needed, set the
    Peer Address
    .
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