The working mode of the SPQ4 board is set incorrectly. As a result, the TPS fails. To solve the problem, set the working modes of the working and protection SPQ4 boards correctly.
Symptom
On the OptiX OSN 3500, three SPQ4 boards form a TPS protection group. Slot 2 is the slot for the protection board. Slots 3 and 4 are the slots for the working boards. During the TPS test, the TPS switching time is longer than 50 ms.
Cause Analysis
The SPQ4 board can work in the 140 Mbit/s or 150 Mbit/s mode. The default working mode is the 140 Mbit/s mode. Check the TPS configuration. It is found that the working mode of the protection board in slot 2 is different from the working modes of the working boards in slots 3 and 4. The SPQ4 board in slot 2 is set to the 140 Mbit/s mode whereas the SPQ4 boards in slots 3 and 4 are set to the 150 Mbit/s mode.
Procedure
- Set the SPQ4 in slot 2 to the 150 Mbit/s mode and then perform TPS. The TPS is successfully performed.
Reference Information
When you configure the TPS function, ensure that the working modes of the multi-mode boards (for example, the SPQ4) are the same.
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