The NE software V100R008C10SPC200 does not support hardware tributary subnetwork
connection protection (SNCP) on the TN54THA and TN53TSXL boards. To be specific, a
TN54THA or TN53TSXL board equipped with hardware tributary SNCP will insert an incorrect
s-code to the cross-connect board on the NE. As a result, the cross-connect board will report a HARD_BAD alarm, affecting services on the NE.
Product Model: OptiX OSN 8800 V1R008C10SPC200
Problem Description
Trigger conditions:
The NE software version is V100R008C10SPC200.
Hardware tributary SNCP has been configured on RX/TX ports 9–16 of a TN54THA board or the RX/TX port of a TN53TSXL board on the NE.
Hardware tributary SNCP is newly configured on RX/TX ports 9–16 of a TN54THA board or the RX/TX port of a TN53TSXL board on the NE.
The cross-connect board on the NE is TN16UXCM, TN52UXCH, TN52UXCM, TNK2USXH, or TNK2UXCT.
During NE expansion, the cross-connect boards on the NE are upgraded from TN16XCH, TN52XCH, TN52XCH02, TNK2SXH, ]TNK2XCT, TNK4SXM, TNK4SXM, or TNK4XCT to TN16UXCM, TN52UXCH, TN52UXCM,
TNK2USXH, or TNK2UXCT.
When conditions 1, 2, and 5, or conditions 1, 3, and 4 are met, the NE will report a HARD_BAD
alarm.
Symptom:
The NE reports a HARD_BAD alarm and services on the NE are affected.
Identification method:
Conditions 1, 2, and 5, or conditions 1, 3, and 4 are met, and the NE reports a HARD_BAD alarm.
The alarm parameters are as follows: 0xf,0x5,0xa,0xff,0xff,0xff.
Root Cause
The OptiX OSN 8800 V100R008C10SPC200 does not support hardware tributary SNCP on the
TN54THA and TN53TSXL boards. If hardware tributary SNCN is configured on a TN54THA or
TN53TSXL board, array violation will occur on the board, causing the board to insert an incorrect
s-code to the cross-connect board on the NE. As a result, bit changes occur on the chip page of the cross-connect board. Consequently, the cross-connect board reports a HARD_BAD alarm.
Impact and Risk
The network expansion is affected. When common cross-connect boards are upgraded to U-series cross-connect boards, the HARD_BAD alarm will be reported, and the tributary SNCP services on the
TN54THA or TN53TSXL boards will be interrupted.
If U-series cross-connect boards are already used, the HARD_BAD alarm will be reported
when tributary SNCP services are created. As a result, the new services cannot be provisioned
but the existing services are not affected.
The existing tributary SNCP services are not affected in non-expansion scenarios.
Measures and Solutions
Recovery measures:
In expansion scenarios, use the NE software V100R008C10SPC300 instead of
V100R008C10SPC200.
If tributary SNCP services fail to be created on the NE software V100R008C10SPC200, upgrade
the NE software version to V100R008C10SPC300 or later.
Workarounds:
If tributary SNCP services are configured for the TN54THA or TN53TSXL board on an NE, use NE software V100R008C10SPC300 or later instead of V100R008C10SPC200.
Preventive measures:
If tributary SNCP services are configured for the TN54THA or TN53TSXL board on an NE, use NE software V100R008C10SPC300 or later before capacity expansion.
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