Moving from bypass mode back to in-line mode
Moving from bypass mode back to in-line mode involves the following.
Manual Sensor reboot
Certain normal Sensor activity involves a reboot, such as the installation of a new Sensor software image or a manual reboot issued by the Manager. If the Sensor reboots during normal activity, no manual intervention is necessary. When the switch receives power from the power adaptor and a heartbeat signal from the Sensor, it sends traffic through the Sensor and the Sensor resumes monitoring traffic in in-line mode.
Sensor Error
If the Sensor reboots due to internal error, hardware failure, removal of the Optical Bypass Switch during normal operation, or, disruption of the Sensor or the Optical Bypass switch cables during Sensor operation, the monitoring ports connected to the Optical Bypass Switch are automatically enabled once Sensor resumes monitoring traffic in in-line mode.
What happens in a Sensor failure?
When a Sensor fails with the bypass kit in place, the following events occur in the order shown.
The Manager reports a "Sensor in bad health" or "Port pair is in bypass mode" error in the Operational Status window.
The Sensor reboots and the optical bypass switch begins forwarding traffic. All traffic then bypasses the Sensor and flows across the optical bypass switch with minimal traffic disruption.
Upon reboot completion, the optical bypass switch resumes its heartbeat, and one of the following occurs:
If the reboot happened during normal activity as described above, the optical bypass switch resumes passing data through the Sensor once the Sensor returns to in-line mode.
If the reboot occurred due to an error, the optical bypass switch will continue to bypass the Sensor until the Sensor ports are re-enabled automatically. Once the ports are re-enabled, the optical bypass switch resumes passing data through the Sensor and the Sensor returns to in-line mode.
The errors on the Manager are cleared and normal health is reported.
Common Problems and Solutions
This section lists some common installation problems and their solutions.
Problem | Possible Cause | Solution |
|---|---|---|
Network or link problems. | Improper cabling or port configuration. | Ensure that the transmit and receive cables are properly connected to the optical bypass switch. |
The sensor LED is off. | The Sensor is powered off. The Sensor port cable is disconnected. | Restore Sensor power. Check the Sensor cable connections. |
The sensor is operational but is not monitoring traffic. | Network device cables have been disconnected. The Sensor ports have not been enabled in the Sensor. | Check the cables and ensure they are properly connected to both the network devices and the optical bypass switch. Ports are disabled on a Sensor failure; they must be re-enabled in the Manager for the Sensor monitoring to resume. |
The optical bypass switch power LEDs are off. | If the power LEDs do not illuminate on the bypass switch, it indicates that either the power supply is not connected or it is not functioning. | Check the connection of the power supply in the optical bypass switch. It indicates that either the power supply is not connected or it is not functioning. |
Runts or giants errors on switches and routers. | Improper cabling or port configuration. | Ensure that the transmit and receive cables are properly connected to the optical bypass switch. |
The system fault "Switch absent" appears on the operational status page of the Manager. | Improper cabling. | Ensure that the transmit and receive cables are properly connected to the optical bypass switch. |