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"Sample message with invalid slot id received" error message on enabling sFlow in BD-X8

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Title"Sample message with invalid slot id received" error message on enabling sFlow in BD-X8
Symptoms
  • BD-X8 generating below mentioned error message in logs when sFlow is enabled

11/05/2015 05:25:00.14 <Warn:sflow.sample.RecvSmplErr> MM-A: Failed to extract sample. Sample size 64 Bundle Size 3016 Sample num 14
11/05/2015 05:25:00.14 <Warn:sflow.debug.RecvMsgInv> MM-A: Sample message with invalid slot id received. Garbage message number 6302

Environment
  • BD-X8

  • EXOS 15.6.2.12patch1-1

Cause
  • The SFLOW sampling fails/not working for all packets that are lifted/forwarded to CPU. Apart from that, there should not be any service impact. Currently there is no work-around for this issue.

  • Our lab tests confirmed with couple of traffic (multicast packets (224.0.0.1) and packets destined to switch MAC) and found that the sampling has failed.

  • Reported error messages indicate that the sampling fails since the sflow process has received an invalid sample (garbage value) from the kernel.

Resolution
  • We can track this CR# xos0057363 for more information.
  • This CR fixed in EXOS 15.7.3.1-patch1-6 (not updated in release notes but issue got fixed) and 16.1.3.6-Patch1-2 version.
  • For more information, please contact GTAC for assistance.
Additional notes

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