Certain ports on the N1SLQ4 board are unavailable due to the bus wiring limitation of the cross-connect board. This problem is solved by reinstalling the N1SLQ4 board.
Symptom
The OptiX OSN 3500 is configured with the N1SXCSA board. Two N1SLQ4 boards are installed in slots 4 and 15, but only the former two optical interfaces of the boards are available.
Cause Analysis
When planning the slots of boards, you need to consider the access capacity of slots, the bus wiring of the cross-connect board, and the bus rate of the board.
- The OptiX OSN 3500 is configured with the N1SXCSA board. The access capacities of slots 5 and 14 are 5 Gbit/s. The total rate of the ports on the N1SLQ4 board is 2.5 Gbit/s. Therefore, the problem is not caused by access capacity limitation.
- The N1SXCSA board can adapt to 622 Mbit/s buses and 2.5 Gbit/s buses.
- The bus rate of the N1SLQ4 board is 622 Mbit/s, so four 622 Mbit/s buses are required to support the four optical interfaces on the board. However, slots 4 and 15 provide only two buses respectively. Therefore, only the former two optical interfaces on the boards are available.
Procedure
- Reinstall the N1SLQ4 boards into slots 5 and 14. Slots 5, 6, 13, and 14 provide four buses. Then, all optical interfaces on the boards are available.
Related Information
On the OptiX OSN equipment, two types of backplane buses are available, namely, 622 Mbit/s and 2.5 Gbit/s. The bus specifications of the OptiX OSN equipment are as follows:
- The OptiX OSN 1500 supports 622 Mbit/s buses only.
- The OptiX OSN 2500 supports 622 Mbit/s buses only.
- When configured with the GXCSA, EXCSA, or UXCSA/UXCSB, the OptiX OSN 3500 supports 622 Mbit/s buses only. When configured with the SXCSA/SXCSB, IXCSA/IXCSB, or FXCSA, the OptiX OSN 3500 can adapt to 622 Mbit/s buses and 2.5 Gbit/s buses.
- The OptiX OSN 7500 can adapt to 622 Mbit/s buses and 2.5 Gbit/s buses.
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