Description of the problem

When the OSN3500 is configured with a 200G IXCSA cross board with a 10Gbit/s rate in slots 5, 6, 13, and 14, why can I plug in SLQ16 but not SLD16?

Alarm Message

None

Processing

After checking, it is confirmed that SLD16 cannot be inserted in slots 5, 6, 13 and 14.

Root cause

The number of slots that can be inserted in a single board is related to the slot capacity, cross-capacity, single board version, and bus rate of the single board.

The backplane rate of the cross board (N1IXCSA/B) supports 622M/2.5G compatibility, and the backplane rate of other single boards is fixed.

2. The bus rate of N1SLD16 board is 622M, which requires 8 buses, but the bus distribution of the cross board (N1IXCSA/B) is 2 buses in slots 1-4 and 15-17, 4 buses in slots 5, 6, 13 and 14, and only 16 buses in slots 7, 8, 11 and 12 to meet the requirements, so the N1SLD16 board can only be installed in slots 7, 8, 11 and 12, Therefore, the N1SLD16 board can only be installed in slots 7, 8, 11 and 12.

3. The backplane rate of SLQ16 single board is 2.5G, so when configuring IXCSA, the 4 buses in slots 5, 6, 13, and 14 meet the requirements of 4 2.5G optical ports, so SLQ16 can be inserted in slots 5-8 and 11-14, while slots 1-4 and 15-17 have 2 buses and can only be configured with two optical ports.

Solution

Replace SLD16 to slots 7-8, 11-12.

Recommendations and Summary

When choosing a single board, you should first understand the characteristics of the single board and the bus distribution to ensure that the single board normal use.

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