Feature Description

The SMF supports peer management in routing. It allows to choose an appropriate peer for a transaction to occur.

The peer selection logic depends on the Diameter Endpoint and Host Selection configuration.

The Diameter servers connect to the gateway in direct and indirect ways through DRA. The entities involved in the peer management are as follows:

  1. Destination-Host: A Diameter entity servicing the request or the final destination for the Diameter message

  2. Peer: Connects with the Diameter entity that establishes transport (TCP) connection directly. It can be either a DS or DRA.

  3. Route Entry: Defines a path for reaching a Diameter entity from the gateway, essentially the next immediate peer to contact to reach a particular Diameter entity.

  4. Routing Table: The diabase library maintains the table of route-entries. The construction of a routing table is through the configuration under the Diameter Endpoint (peer and route-entry CLI) and also dynamically learned from the response messages.

  5. Multipath Routes: Multipath Routes are when there are more than one route entry to reach a particular Diameter entity.