Summary: 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 Line: Transport network product line Product Family: WDM products
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 SNCP 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.
Telephone: 852-30623083
Email: Sales@Thunder-Link.com
Website: http://www.thunder-link.com
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