Product Line
|
Transport network product line
|
Product Family
|
WDM products
|
Product Model
|
OptiX OSN 3800 (3800A)
OptiX OSN 6800 (6800A)
OptiX OSN 8800
OptiX BWS 1600G (1600S)
OptiX OSN 1800
OptiX OSN 9800
OptiX OSN 9600
OptiX Metro 6100
|
Release Date
|
2014-01-26
|
Severity
|
Minor
|
Urgency
|
Non-urgent
|
Versions Involved
|
All versions
| ||
Devices Involved
|
OptiX OSN 3800 (3800A)
OptiX OSN 6800 (6800A)
OptiX BWS 1600G (1600S)
OptiX OSN 1800
OptiX OSN 9800
OptiX OSN 9600
OptiX Metro 6100
| ||
Application Scope
|
In and out of China
| ||
Operation Category
|
Precaution
| ||
Precaution ID
|
20208
| ||
Operation Requirements
|
Learn how to prevent the same issue.
| ||
Expected Completion Date
|
N/A
| ||
Manpower Required
|
N/A
| ||
Contacts
|
Product Line Contact
|
Zhang Yi (employee ID: 00149002)
| |
Regional Office Rectification Contact
|
Rectification project manager at each regional office
| ||
Representative Office Rectification Contact
|
Rectification project manager at each representative office
| ||
Keywords:
External switching status, system control or AUX board reset, active/standby switching
Summary:
WDM devices do not save external switching commands to the databases. Therefore, the external switching status will be lost when the system control or AUX board undergoes a reset or active/standby switching.
[Problem Description]
Trigger condition:
The problem occurs when the conditions listed in the table in "Root Cause" are present.
Symptom:
After the system control or AUX board undergoes a reset or active/standby switching, the external switching command issued before the reset or switching will be lost. As a result, a protection group performs switching based on the current status of the working and protection channels. External switching status can be forced switching, manual switching, locked switching, and WTR.
Identification method:
Check the protection group status on the NMS.
[Root Cause]
OTN standards do not specify whether to save external switching status. External switching commands are maintenance commands that are similar to loopback functions and external switching status is temporary. Therefore, WDM devices do not save external switching status to the databases. After the board that temporarily saves the external switching status undergoes a reset, the status will be lost.
The following lists the scenarios in which the external switching status will be lost.
Product
|
Device Type
|
Protection Type
|
Trigger Condition
|
OptiX OSN 3800 (3800A)
OptiX OSN 6800 (6800A)
OptiX OSN 8800
OptiX BWS 1600G (1600S)
|
OptiX OSN 6800A
OptiX OSN 3800A
OptiX OSN 3800
OptiX OSN 6800
OptiX OSN 8800 T32
OptiX OSN 8800 T64
OptiX OSN 8800 T32E
OptiX OSN 8800 T64E
OptiX OSN 6800
OptiX OSN 8800 platform subrack
|
Client 1+1, extended intra-board 1+1, intra-board 1+1, and optical line 1+1 protection configured using the TN12OLP/TN12DCP board
|
The system control board in the subrack housing the TN12OLP/TN12DCP board undergoes a reset or active/standby switching.
|
OptiX OSN 8800 T16
OptiX BWS 1600S T16
|
Client 1+1, extended intra-board 1+1, intra-board 1+1, and optical line 1+1 protection configured using the TN12OLP/TN12DCP board
|
The AUX board in the subrack housing the TN12OLP/TN12DCP board undergoes a reset or active/standby switching.
| |
OptiX OSN 8800 UPS
OptiX OSN 9800 UPS
OptiX OSN 9600 UPS
OptiX BWS 1600GPlus
OptiX OSN 9600 platform subrack
OptiX OSN 9800 platform subrack
|
Client 1+1, extended intra-board 1+1, intra-board 1+1, and optical line 1+1 protection configured using the TN12OLP/TN12DCP board
|
The EFI board in the subrack housing the TN12OLP/TN12DCP board undergoes a reset.
| |
All devices
|
Client 1+1 protection configured using the SCS board
|
The system control board in the master subrack undergoes a reset or active/standby switching.
| |
All devices
|
SNCP protection
Ring protection
|
The system control board in the master subrack undergoes a reset or active/standby switching.
| |
OptiX OSN 1800 V packet enhanced
|
All devices
|
Intra-board 1+1 protection
Extended intra-board 1+1 protection
Optical line 1+1 protection
Client 1+1 protection
SNCP protection
|
The system control board undergoes a reset or active/standby switching.
|
OptiX OSN 1800 compact
|
OptiX OSN 1800 1U
OptiX OSN 1800 2U
|
Port-level protection configured using the OLP board, including client 1+1, inter-subrack 1+1, extended intra-board 1+1, and optical line protection
|
The system control board in the subrack housing the OLP board undergoes a reset.
|
OptiX OSN 1800 1U
OptiX OSN 1800 2U
|
OTU intra-board 1+1 protection
SNCP protection
Client 1+1 protection configured using the SCS board
|
The system control board in the subrack housing the OTU board undergoes a reset.
| |
OptiX OSN 1800 packet
|
All devices
|
Client 1+1 protection
Optical line protection
Intra-board 1+1 protection
SNCP protection
|
The system control board undergoes a reset or active/standby switching.
|
OptiX OSN 9800
OptiX OSN 9600
|
OptiX OSN 9800 UPS
OptiX OSN 9600 UPS
OptiX OSN 9600 platform subrack
|
Optical line 1+1 protection
OLP intra-board 1+1 protection
Extended intra-board 1+1 protection
|
The system control board in the subrack housing the OLP/DCP board undergoes a reset or active/standby switching.
|
OptiX OSN 9800 UPS
OptiX OSN 9600 UPS
|
Optical line 1+1 protection
OLP intra-board 1+1 protection
Extended intra-board 1+1 protection
|
The EFI board in the subrack housing the OLP/DCP board undergoes a reset.
| |
OptiX BWS 1600
OptiX BWS 1600S
OptiX Metro 6100
|
All devices
|
Client 1+1 wavelength protection
Inter-board wavelength protection
WXCP protection
|
The system control board undergoes a reset.
|
[Impact and Risk]
After the external switching status is lost, the protection group determines whether to trigger protection switching based on the current status of the working and protection channels. If protection switching is triggered, services will be transiently interrupted.
[Measures and Solutions]
Recovery measures:
Issue an external switching command again.
Workarounds:
None.
Preventive measures:
None.
More related:
No comments:
Post a Comment