Network Clock State Change on Pseudo-wired E1 (CEM)

[emcueto08]

Hi,

Good day.

Just want to what do these logs mean or happened to the network to have these kinds of logs.

Jun 22 15:34:56.058 UTC: %TOP_MODULE-6-CLK_STATUS_CHANGE: Recovered clock status changed to HOLDOVER
Jun 22 15:34:56.058 UTC: %NET_CLK_SEL-6-NETCLK_STATE_CHANGE: Network clock state change to HOLD OVER (Packet Timing)
Jun 22 15:34:56.086 UTC: %TOP_MODULE-6-CLK_STATUS_CHANGE: Recovered clock status changed to ACQUIRING
Jun 22 15:49:57.720 UTC: %NET_CLK_SEL-6-NETCLK_HOLDOVER_TIMEOUT: Network clock holdover timeout exceeded for reference 1
Jun 22 15:49:57.720 UTC: %NET_CLK_SEL-6-NETCLK_STATE_FREE_RUN: Network clock commanded to free run.
Jun 22 15:55:23.999 UTC: %TOP_MODULE-6-CLK_STATUS_CHANGE: Recovered clock status changed to FREQ LOCK
Jun 22 15:55:25.731 UTC: %NET_CLK_SEL-6-NETCLK_STATE_CHANGE: Network clock state change to SELECTED (Packet Timing)
Jun 22 15:55:40.715 UTC: %NET_CLK_SEL-6-NETCLK_STATE_CHANGE: Network clock state change to LOCK (Packet Timing)

Thanks and regards,

Eugene

[Giuseppe Larosa]

Hello Eugene,

the system missed the master clock for several minutes

un 22 15:34:56.058 UTC: %TOP_MODULE-6-CLK_STATUS_CHANGE: Recovered clock status changed to HOLDOVER
Jun 22 15:34:56.058 UTC: %NET_CLK_SEL-6-NETCLK_STATE_CHANGE: Network clock state change to HOLD OVER (Packet Timing)
Jun 22 15:34:56.086 UTC: %TOP_MODULE-6-CLK_STATUS_CHANGE: Recovered clock status changed to ACQUIRING
Jun 22 15:49:57.720 UTC: %NET_CLK_SEL-6-NETCLK_HOLDOVER_TIMEOUT: Network clock holdover timeout exceeded for reference 1
Jun 22 15:49:57.720 UTC: %NET_CLK_SEL-6-NETCLK_STATE_FREE_RUN: Network clock commanded to free run.
Jun 22 15:55:23.999 UTC: %TOP_MODULE-6-CLK_STATUS_CHANGE: Recovered clock status changed to FREQ LOCK

you should check what is the reference clock in the system: if it is an external link, it might have experienced problems during this time window

Hope to help

Giuseppe