2.21.4 Application Routing Rules Configuration

An Application Routing Rule defines message routing to a diameter application based on message content matching the Application Routing Rules conditions.

If the redirect Application Routing Table (ART) instance is not configured, redirect processing skips ART evaluation for the redirected request, and it goes directly to Peer Routing Table (PRT) evaluation. If the redirect ART is configured, redirect processing searches for that ART and performs ART evaluation of the redirect request.

There are six Application Routing Rule parameters:

  • Destination-Realm
  • Destination-Host
  • Application-ID
  • Command-Code
  • Origin-Realm
  • Origin-Host

When a Diameter message matches the conditions of an Application Routing Rule then message is routed to the diameter application specified in the rule.

A priority is given to Application Routing Rules based on their connection to other Application Routing Rules. The highest priority routing rule that a message matches determines how it is routed. An Application Routing Rule has a higher priority if its allocated number is lower. 1000 is the lowest priority, while 1 is the highest.

One or more diameter applications must be activated before Application Routing Rules can be configured.

On the Viewing Rules for Application Route Table: (Application Route Table Name) page, you can perform the following actions:
  • Filter the list of Rule Names to display only the desired Rules.
  • Sort the list entries in ascending or descending order by Rule Name, Priority, or Application Name by selecting the column heading.
  • By default, the list is sorted on priority in ascending ASCII order. The lowest Priority value indicates the highest priority. For Rules with the same priority, the Rule Name is used for sorting.
  • On the Inserting Rule for Application Route Table: (Application Route Table Name) page, you can add a new Application Routing Rule and its values. See Adding an Application Routing Rule. If the maximum number of Application Routing Rules (65000) already exists in the system, then the Inserting Rule for Application Route Table: (Application Route Table Name) page does not appear and an error message displays.
  • Select the Rule Name of an Application Routing Rule in the list and click Edit. On the Editing Rule for Application Route Table: (Application Route Table Name) page, you can edit the selected Application Routing Rule. See Editing an Application Routing Rule.
  • Select the Rule Name of an Application Routing Rule in the list and click Delete to remove the selected Application Routing Rule. See Deleting an Application Routing Rule.