Product |
Top Assembly |
Random # |
|
---|---|---|---|
Part Number |
Rev. |
||
15454-SFP-OC48-IR= |
10-1422 |
01 |
SFP - OC-48/STM-16 - 1310nm IR - SM - LC. Problem is fixed in 10-1975-01 |
15454-SFP-GEFC-SX= |
10-1833 |
01 |
SFP - GE/1G-FC/2G-FC - 850nm - MM - LC. Problem is fixed in revision 02 |
15454-SFP-GE+-LX= |
10-1832 |
01 |
SFP - GE/1G-FC/2G-FC/HDTV - 1310nm - SM - LC Problem is fixed in revision 02 |
Digital diagnostic of the above listed units may lock-up reporting constant value for laser current, RX and TX power even in the case that the physical value would change.
This lock-up does not affect traffic.
The MDS9000 product line is not affected by this change
The problem is caused by a memory device used inside the Cisco Small Form-factor Pluggable (SFP) module that, under particular timing conditions, enter a lock-up state in which the last PM value is continuously reported.
The probability of lock-up condition occurring under normal operating condition is very low.
Reference to the tables below for detailed systems descriptions.
TX Power
Client to Trunk |
Transition |
Behavior of Unit in All Cases |
|
From |
To |
||
Output power within specified operating range |
No Input Power (eg. Fiber Cut) |
According to specification |
|
Output power within specified operating range |
Input power below specified operating range |
No Alarms for TX POWER LOW but BER degradation |
|
No output power |
Input power withing specified operating range |
Alarm of TX POWER LOW |
RX Power
Trunk to Client |
Transition |
Behavior of Unit in All Cases |
|
From |
To |
||
Input power within specified operating range |
No output power (eg. Fiber cut) |
According to specifications |
|
No input power |
Output power within specified range |
Alarm of RX POWER LOW |
Laser Bias Current
Trunk to Client |
Transition |
Behavior of Unit in All Cases |
|
From |
To |
||
TX laser operating within specired operating range |
RX laser below the specified operating range |
No Alarms |
No workaround is available. In case of component failure and diagnostic information is required, SFP has to be replaced.
If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:
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