Verifying Initialization Status in Backup SIP Servers
Starting with version 8.1.103.64, the backup SIP Server can heck the status of its internal components during startup to ensure it provides the service when it is promoted to Primary. If any internal component (T-Controller, Smart Proxy, Interaction Proxy, or Operational Information thread) fails to complete initialization, SIP Server reports the SERVICE_UNAVAILABLE status to the Management Layer (LCA/SCS).
In addition, if SIP Server fails to open a SIP port during startup, it reports the SERVICE_UNAVAILABLE status to LCA/SCS. Note that this approach does not work for the IP Address Takeover procedure or same host configuration.
To enable this functionality, configure the following options:
backup-init-check
Setting: [TServer] section, Application level
Default Value: false
Valid Values: true, false
Changes Take Effect: After restart
When set to true, SIP Server in Backup mode verifies that all internal components (T-Controller, Smart Proxy, Interaction Proxy, and Operational Information thread) are successfully initialized, and can provide the service when SIP Server switches to Primary mode. If some components fail to complete initialization, SIP Server reports the SERVICE_UNAVAILABLE status to LCA/SCS. The timeout for internal components to complete initialization is defined by the backup-init-check-timeout option.
backup-init-check-timeout
Setting: [TServer] section, Application level
Default Value: 60
Valid Values: 15-3600
Changes Take Effect: After restart
Restricted option. Specifies the timeout, in seconds, during which SIP Server verifies that all internal components are successfully initialized in a scenario described by the backup-init-check option.
backup-sip-port-check
Setting: [TServer] section, Application level
Default Value: true
Valid Values: true, false
Changes Take Effect: After restart
When set to true, SIP Server in Backup mode attempts to open a SIP port. If the port opens successfully, no SIP messages are processed, and SIP Server closes the port immediately. If the SIP port does not open, SIP Server reports the SERVICE_UNAVAILABLE status to LCA/SCS. This functionality is enabled only when backup-init-check is set to true. The functionality is disabled in the IP Address Takeover configuration, when the control-vip-scripts option is set to true.