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Some A9K-MPA-20X1GE Modular Port Adapters (MPAs) with lower mechanical tolerance might fail to boot in some Slot 0 Aggregation Services Router (ASR) 9001s in the installation process or after replacement with a Return Material Authorization (RMA).
Some A9K-MPA-20X1GE MPAs have lower mechanical tolerance. When they are inserted into the ASR 9001 chassis Slot 0, the EMI gasket gets pushed under pressure. This leads to the EMI gasket shorting with the LED circuit and shows up as an MPA failure.
This issue impacts A9K-MPA-20X1GE MPAs manufactured from 01/02/2012 to 12/07/2012.
The failure may manifest in two forms:
- The ASR 9000 MPA (20X1G) does not power up in Slot 0 in the ASR 9001 (the left side bay when viewed from the front).
- The status LED does not glow and the console displays error messages as shown in the highlighted text.
Sometimes if you tighten or back the MPA jack screw, it might help to power on the green or amber LED. In this case, if you enter the platform command from the console it shows that the MPA is OK.
If another MPA (4X10G or 2X10G) is placed in Slot 0 it should come up fine.
Cisco recommends a fix-on-fail strategy for this issue.
As of approximately 12/06/2012, new products that were manufactured under Engineering Change Order (ECO) E113786 are free of this issue. Refer to the How to Identify Affected Products section for instructions on how to view the version and deviation of in-service product.
Service Logistics has good inventory at this time. The standard RMA process and delivery times are in effect. Create an RMA for the A9K-MPA-20X1GE ONLY when the issue is observed. Once a MPA inserted in Slot 0 fails, the failure is permanent and the MPA might not work in Slot 1 and an RMA is required.
How To Identify Affected Products
The A9K-MPA-20X1GE can be identified with three methods:
- Check the serial number in order to identify if the MPA is affected.
- Physically inspect the MPA in order to identify the Serial Number (SN), Product ID (PID), and Top Assembly Number (TAN).
- Enter the sh diag 0/3/0 command (Admin or SuperUser privilege might be required).
These pictures show a good MPA and a suspect MPA.
Bad MPA - the LED turns red when pressure is applied
Should the ASR 9001 chassis be replaced?
No, this is a mechanical tolerance issue that affects only MPAs. The entire ASR 9001 chassis should not be included on the RMA.
Does this affect any platforms?
The MPAs are used on ASR 9001, ASR 9006 and ASR 9010. However, the tolerance might only be observed on a few ASR 9001 chassis Slot 0.
For More Information
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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