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Cisco Bug: CSCup91567 - ASR1001-X boot-loops with CMCC crash and XGM MAC10 block errors

Last Modified

Oct 31, 2019

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)

An ASR1001-X router may enter a "boot-loop" when its powered ON.
with this defect the CMCC process will crash during system initialization i.e during router bootup.
This might repeat on each subsequent router bootup. 

Messages similar to the following may be seen:

*Aug  3 06:13:42.758: %CMCC-0-PLIM_HALT: SIP0: cmcc:  A PLIM driver has critical error Ysn-Mac10 - xgm: crc, 0, param 29 param 0
*Aug  3 06:13:42.997: %PMAN-3-PROCHOLDDOWN: SIP0:  The process cmcc has been helddown (rc 134)
*Aug  3 06:13:43.021: %PMAN-0-PROCFAILCRIT: SIP0:  A critical process cmcc has failed (rc 134)

This is a corner case. And there is no configuration- or traffic-specific trigger to hit this issue. 
This problem might occur in any of the power on of ASR1001-X.

This issue occurs when an error interrupt is recorded by the main forwarding ASIC and due to this defect the interrupts are not cleared on a subsequent reboot.

This problem can happen on any kind of reloads crash reload/software reload/power cycle.

if once it occurs it will keep repeating
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