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Cisco Bug: CSCvt60814 - PTP Sync packets dropped from IPN

Last Modified

Oct 03, 2020

Products (24)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 93108TC-FX Switch
  • Cisco Nexus 9396TX Switch
  • Cisco Nexus 9396PX Switch
  • Cisco Nexus 93120TX Switch
  • Cisco Nexus 93240YC-FX2 Switch
  • Cisco Nexus 9372TX-E Switch
  • Cisco Nexus 9332C Switch
  • Cisco Nexus 93108TC-EX Switch
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Known Affected Releases


Description (partial)

A port-facing interpod network gets the "Uncalibrated" status, and PTP packets are not seen as received on the spine switch.

This issue occurs under the following conditions:

- Multipod latency feature with PTP GM enabled in the interpod network. 
- GM running on IPN and spine switches that are connected to the interpod network BC expecting to negotiate PTP port state as Slave.
- PTP packets not seeing as received.
- PTP packets marked with DSCP 59.
- Interpod network devices that are acting as BC might set dscp 59 by default for PTP.
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Bug Details Include

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