TCP Keepalive Failure

Endpoint reachability can be determined from TCP keepalives, as enabled per SIP interface. This method of determining connectedness is based on configuring the global network parameters configuration element that is enabled on a SIP interface with the tcp-keepalive parameter. See the System TCP Keepalive Settings section of the Oracle SBC ACLI Configuration guide for how to configure the TCP keepalive feature. When an endpoint fails the TCP keepalive test, provisions begin to remove that contact from the registration cache and then the ENUM user database.