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Cisco Bug: CSCun37844 - "detected duplicate or out-of-order packet" logs generated indefinitely.

Last Modified

Dec 24, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

12.2(1)

Description (partial)

Symptom:
sft logs as follows were seen indicating duplicate or out of order sft test packets. Additionally, the 'show npu stats sft' in the SSD shows really big numbers.

"sft 58000: detected duplicate or out-of-order packet" logs generated indefinitely in commercial chassis
after customer found this error log in their commercial chassis as follows.

2014-Feb-26+19:04:49.832 [sft 58000 info] [2/0/2932 <sft:200> sft_packet.c:224] [software internal system critical-info syslog] SFT:  detected duplicate or out-of-order packet number 1388475, last recieved valid packet number 1388475
2014-Feb-26+19:04:49.731 [sft 58000 info] [2/0/2932 <sft:200> sft_packet.c:224] [software internal system critical-info syslog] SFT:  detected duplicate or out-of-order packet number 1388473, last recieved valid packet number 1388473
2014-Feb-26+19:04:49.731 [sft 58000 info] [2/0/2932 <sft:200> sft_packet.c:224] [software internal system critical-info syslog] SFT:  detected duplicate or out-of-order packet number 1388471, last recieved valid packet number 1388471
2014-Feb-26+19:04:49.731 [sft 58000 info] [2/0/2932 <sft:200> sft_packet.c:224] [software internal system critical-info syslog] SFT:  detected duplicate or out-of-order packet number 1388469, last recieved valid packet number 1388469
2014-Feb-26+19:04:49.631 [sft 58000 info] [2/0/2932 <sft:200> sft_packet.c:224] [software internal system critical-info syslog] SFT:  detected duplicate or out-of-order packet number 1388467, last recieved valid packet number 1388467

Conditions:
PSC card should be up for more than 710 days for these logs to appear. This time is sufficient for the sft packet counter to undergo 32 bit overflow causing issues in interpreting the 64-bit counter value leading to this problem.
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