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Some Cisco ASR 9000 Series Aggregation Services Routers (ASR9K) with select line cards (A9K-MOD80-xx or A9K-MOD160-xx) might experience a one-time reload in the event of an online insertion of the Multi Port Adapter (MPA). Only the MPAs with Top Assembly Number (TAN) 68-5825-01 are affected. After the reload, the A9K-MOD80/A9K-MOD160 line card and A9K-MPA-20X1GE will boot up and work normally.
Extra capacitors that were introduced to TAN 68-5825-01 Version 04 for the A9K-MPA-20X1GE were later found to cause online insertion issues and have since been removed. The affected units were manufactured between November 2015 and June 2016. Only a small number of shipped units are affected.
No network impact is anticipated in either of these scenarios:
- A new A9K-MOD80-xx or A9K-MOD160-xx line card is installed (the line card and Ethernet Plug (EP) are inserted together).
- There is no EP present in any of the bays on the A9K-MOD80/A9K-MOD160 (a single EP is operational on the line card).
When an affected A9K-MPA-20X1GE MPA is online inserted into an A9K-MOD80/A9K-MOD160, a one-time reload of the A9k-MOD80/A9K-MOD160 occurs, and then the unit boots successfully.
There are two scenarios that present symptoms due to the issue that is described in this Field Notice:
- The first scenario occurs during a Power Sequencer Failure, and this error message is generated:
Error msg: PLATFORM-CANB_SERVER-7-CBC_PRE_RESET_NOTIFICATION : Node 0/0/CPU0 ,
Power Sequencer Failure (0x09000000)
The MOD line card reloads immediately due to the Power Sequencer Failure detection.
Note: The reload time is approximately one minute.
- The second scenario involves a CBC watchdog timeout and heartbeat loss, and this error message is generated:
Error msg: %PLATFORM-ENVMON-4-CBC_WDOG_EXCEED_THRESHOLD : CBC on node 0/0/CPU0
has not seen watchdog toggle in at least 23 seconds
"0/0/CPU0 heartbeat, non-responsive for 234 seconds. (Threshold: 460 seconds),
Send/Rcv Seq#: 1028/911"
The MOD line card appears to stick when the MPA is online inserted.
Note: The reload time is approximately eight minutes.
Note: To avoid network impact, if any MPA is installed and operational on an A9K-MOD80/A9K-MOD160, avoid online insertion of an affected second A9K-MPA-20x1GE on an A9K-MOD80/A9K-MOD160. Also, plan the installation during a maintenance window.
In order to workaround this issue, choose the appropriate action for your deployment:
- New Deployments – In order to avoid online insertion, insert an A9K-MOD80/A9K-MOD160 along with the A9K-MPA-20x1GE.
- Existing Deployments – In cases where online insertion is needed and you have an affected MPA, request replacement through Cisco's standard Returned Material Authorization (RMA) process.
How To Identify Affected Products
In order to determine whether you have an affected MPA, enter the Serial Number (SN) of your A9K-MPA-20X1GE(s) into the FN 64163 Serial Number Validation (SNV) tool.
The SN on the A9K-MPA-20X1GE can be identified with one of these methods:
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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