Routing Stages

A routing stage signifies a re-evaluation of local policy based on the results of a local policy lookup. In the simplest, single stage case, the Oracle® Enterprise Session Border Controller performs a local policy lookup on a SIP message’s Request URI. The result of that local policy lookup is a next hop FQDN, IP address, ENUM lookup, or LRT lookup; that result is where the Oracle® Enterprise Session Border Controller forwards the message. In the multistage routing model, that resultant next hop is used as the lookup key for a second local policy lookup.

The results of each stage do not erase the results of the previous stage. Thus, previous results are also possible routes to use for recursion, but the next stage results are tried first.

Note:

Setting a next hop to a SAG in a multistage scenario constitutes an error.