The routing system determines a server flow match by using additional matching criteria. It uses the following fields of server flow configuration for the match:.
URI Group
SIP Received Interface
To complete the matching, SIP routing system follows a sequence:
Uses the SIP To header URI of the incoming request for comparison with the provisioned URI Group to decide a match.
Upon finding a match, the SIP routing system then validates if the destination IP address of the incoming SIP request matches the provisioned IP Address field of the Received Interface configuration.
If either of the URI Group or Received Interface fields does not match, the SIP routing system skips to the next Server Flow. The SIP routing system looks for a match from the set of Server Flows associated with Server Configuration.
If no matching Server Flow is found, the SIP routing system rejects the registration as there is no outbound server flow configured.
