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Cisco Bug: CSCun79010 - Packets drop on LC ingressQ on CRS PE as discard drop after LC OIR on P

Last Modified

Jan 07, 2017

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases

4.2.0.BASE

Description (partial)

Symptom:
1).
online_diag_rp message will be  flooded to the console 
                  online_diag_rp[338]: %DIAG-XR_DIAG-6-INFO : (U) FIM: single-node failure detected - 0/2/CPU0 consecutive ucast/mcast failures: 15/0 
                  online_diag_rp[338]: %DIAG-XR_DIAG-3-ERROR : (U) Fabric Ping Failure, 1 of 6 nodes failed(L): 0/2/CPU0 

2).
Check this command for the LC connected to B:
RP/0/RP0/CPU0:PE2#show controllers ingressq statistics location 0/4/cpu0
Ingressq Drops.
------------------------------------------------------------------------
length error drops - PSE     :                0
length error drops - Cpuctrl :                0
crc error drops - PSE        :                0
crc error drops - Cpuctrl    :                0
OOR error drops - PSE        :                0
OOR error drops - Cpuctrl    :                0 
discard drops                :          2038414
Here 2038414 shows the discard drop

Conditions:
Two routers A and B are connected ,Traffic is moving from A to B,if we do OIR of a Line Card on B ,sometimes ,we may see the discard drops sat ingressQ in A and error messages flooding the console.
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