Hello, I have been using ptp4l with the below config file. What I noticed was -
In Follower mode, when 'Announce Interval' set to more than 4Hz (4 messages per second config value -2) and 'Sync Interval' set to more than 8Hz (8messages per second config value -3), I see ptp4l lock status toggling between "Faulty" to "ÜnCalibrated" to "Slave" to "Faulty" and cycle repeats. The lock status is not getting stabilized. Below is the config file I'm using to run ptp4l in Follower mode. *[global]twoStepFlag 1slaveOnly 1masterOnly 0priority1 128priority2 128domainNumber 120maxStepsRemoved 252clockClass 248clockAccuracy 0xFEoffsetScaledLogVariance 0xFFFFfree_running 0freq_est_interval 1dscp_event 0dscp_general 0clock_type OClogAnnounceInterval -7logSyncInterval -7logMinDelayReqInterval -3logMinPdelayReqInterval 0announceReceiptTimeout 3syncReceiptTimeout 0delayAsymmetry 0fault_reset_interval 4neighborPropDelayThresh 20000000assume_two_step 0logging_level 6path_trace_enabled 0follow_up_info 0hybrid_e2e 0tx_timestamp_timeout 1use_syslog 1verbose 1summary_interval -3kernel_leap 1check_fup_sync 0pi_proportional_const 0pi_integral_const 0pi_proportional_scale 0pi_proportional_exponent -0.3pi_proportional_norm_max 0.7pi_integral_scale 0pi_integral_exponent 0.4pi_integral_norm_max 0.3step_threshold 0first_step_threshold 0.00002max_frequency 900000000clock_servo pisanity_freq_limit 200000000ntpshm_segment 0transportSpecific 0ptp_dst_mac 01:1B:19:00:00:00p2p_dst_mac 01:80:C2:00:00:0Eudp_ttl 64udp6_scope 0x0Euds_address /var/run/ptp4l@eth1network_transport UDPv4delay_mechanism E2Etime_stamping hardwaretsproc_mode filterdelay_filter moving_mediandelay_filter_length 10egressLatency 0ingressLatency 0boundary_clock_jbod 0timeSource 0xA0manufacturerIdentity 00:00:00[fm1-mac10]* Could you please let me know if any of the parameters in this config item could be causing this issue? OR if this issue is known and some fix available in the latest ptp4l version? Thanks in advance. -Guru
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