2.29.3 Timeout Based Redirection

When MME sends a request to DSR and the request gets timed out, based on the configured value in the Pending Answer timeout interval field on the DSR GUI, DSR forwards the request to the next available peer or connection within the selected route group. When the routing fails, rerouting continues until the predefined limit is reached, referred to as Maximum Per Message Forwarding Allowed or Transaction Lifetime, as configured in the Routing Option Sets.

With the timeout based redirection feature, DSR can re-route request to peer or connection within the same route group up to a specified number of times as defined in Max number of retry within same Route Group. When the count of reroutes attempts reaches the maximum limit, it re-routes the request to the next route group based on their priority.

The following image describes the timeout based redirection in the peer route group:

Figure 2-1 Timeout Based Redirection Peer Group

The following image describes the timeout based redirection in the connection route group:

Figure 2-2 Timeout Based Redirection Connection Group

Perform the following procedure to configure the maximum number of retries within the same route group:

1. Log in to the DSR GUI using your login credentials.
2. From the Main Menu, click Diameter.
3. Click Configuration, and then click System Options.
4. In the System Options page, search for the option Max number of retry within same Route Group and edit the value.

The timeout can be set within a range of 0 to 4:

• 0: feature is disabled (range 0: implies that there is no limitation on the max attempts in the same route group).
• 1-4: feature is enabled (range 1-4: implies that the number of times the routing takes place based on the set limit in the same route group).

Note:

The limit is not applicable for the last and single route group.