Description of the problem

OSN3500 networking, network operation and monitoring is normal. After upgrading OSN3500 (from 5.21.12.43 to 5.21.13.47p01) on a certain day, some of the 3500 devices are offline, and the network administrator is unable to log in to the device, nor can he log in from the command line. The network element is configured as SLQ1 at board positions 1, 2, and 3, and SL16 veneer at board positions 8 and 11.ECC messages are passed through board positions 8 and 11.

Processing

Shut down the ECC of the corresponding optical ports of the first three boards, query boards 8 and 11 are assigned to normal ECC, and the network monitoring returns to normal.

Root Cause

The scene directly using the command line login is normal, no other abnormal alarms, using ecc-get-bdinfo query found that the 8, 11 board position did not allocate ECC bytes, while the unused first three board positions corresponding to the optical port is allocated to the ECC, query the ECC allocation mode for the 10-channel D1-D3 mode, after upgrading the master reset to reallocate the ECC is only allocated to the first three board positions lead to the The network elements cannot be monitored.

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