Cisco Bug: CSCut81357 - PTP Leap Second : n5k ptp off clock off by 35 seconds
Sep 09, 2019
- Cisco Nexus 5000 Series Switches
Known Affected Releases
Symptom: There are periodic leap second events which can add or delete a second to global time. The leap second event can be propagated via Precision Time Protocol (PTP) if configured. When the leap second update occurs and the device is configured to use PTP as a Boundary Clock (BC) then an incorrect Coordinated Universal Time (UTC) offset and PTP Leap Indicator could propagate incorrect time downstream. This could cause the PTP network time to be off as much as thirty five seconds. Conditions: The leap second update is propagated from the configured PTP Grandmaster clock. A Cisco device running the PTP protocol would have the "feature ptp" command in the running configuration.
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Bug Details Include
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