OPERATIONAL DEFECT DATABASE
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The router advertises incorrect PTP time which is advanced by 1 day.
The fix is applicable only to scenarios meeting all of the below conditions: - The router PID is one of N540-24Z8Q2C-M, N540-24Z8Q2C-SYS, N540-ACC-SYS, N540X-ACC-SYS, N540_FH_CSR_SYS, N560-4-RSP4E, N560-RSP4-E, NCS-55A1-24Q6H-S, NCS-55A1-24Q6H-SS, NCS-55A1-48Q6H, NCS-55A2-MOD-xx-x, NCS-57B1-5DSE, NCS-57B1-6D24, NCS-57C1-48Q6, NCS-57D2-18DD - The router is configured as a PTP T-GM and is using the gnss-receiver for clock synchronization. - The issue is applicable for time period 01-Jan-2024 to 29-Feb-2024.
There is a workaround available by writing to an internal hardware register. Contact cisco support for the details.
Evaluation of the code shows an anomaly with a day-offset value used in the time calculation logic in a scenario where PTP role is Grandmaster clock and getting Timestamp signals from the on-board gnss-receiver. For leap year (2024), the day offset value should count a day ahead starting from March. However, in current code, this day-offset value is effective from January 1st onward, which results in advertising PTP timestamps advanced by 1 day when the date change from Dec 31st 2023 to Jan 1st 2024 (leap year) till 1st of March 2024 (UTC).
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