Routing Configuration

Routing is provided through the DSR. The DSR functions as a Diameter Relay Agent to forward messages to the appropriate destination based on information contained within the message, including header information and applicable Attribute-Value Pairs (AVP). User-defined Peer Routing Rules define where to route a message to upstream Peer Nodes. The DSR provides the capability to route Diameter messages based on any combination of, or presence or absence of, the following parameters:

• Destination-Realm
• Destination Host
• Application ID
• Command Code
• Origination Realm
• Origination Host
• IMSI

The DSR supports multiple transport connections to each Peer Node and provides the following functions:

• Routing Diameter Request and Answer messages received from Diameter Peers
• Weighted load sharing
• Priority routing
• Rerouting

Configuring DSR routing requires:

1. Creating Route Groups and assigning capacity levels to each Peer Node in each Route Group.
2. Creating Route Lists and defining active and standby Route Groups in each Route List. Active and standby status is determined by Peer Node priority and weight. (See Load Sharing: Route Groups and Route Lists.)
3. Creating Peer Routing Rules and assigning Route Lists and priorities to the rules.
4. Creating Message Copy Configuration Sets if Diameter Message Copy is used.