Erez, Yes, we have 802.1q vlan. 4 bytes vlan head is added as vlan tag. But I think 802.1q vlan will not add 4 bytes at the end of PDU.
The ptp4l configuration is as this: [global] # # Default Data Set # twoStepFlag 1 slaveOnly 1 priority1 128 priority2 128 domainNumber 0 #utc_offset 37 clockClass 248 clockAccuracy 0xFE offsetScaledLogVariance 0xFFFF free_running 0 freq_est_interval 1 dscp_event 0 dscp_general 0 dataset_comparison ieee1588 G.8275.defaultDS.localPriority 128 # # Port Data Set # logAnnounceInterval 1 logSyncInterval 0 logMinDelayReqInterval 0 logMinPdelayReqInterval 0 announceReceiptTimeout 3 syncReceiptTimeout 0 delayAsymmetry 0 fault_reset_interval 4 neighborPropDelayThresh 20000000 masterOnly 0 # # Run time options # assume_two_step 0 logging_level 6 path_trace_enabled 0 follow_up_info 0 hybrid_e2e 0 net_sync_monitor 0 tc_spanning_tree 0 tx_timestamp_timeout 1 use_syslog 1 verbose 0 summary_interval 0 kernel_leap 1 check_fup_sync 0 # # Servo Options # pi_proportional_const 0.0 pi_integral_const 0.0 pi_proportional_scale 0.0 pi_proportional_exponent -0.3 pi_proportional_norm_max 0.7 pi_integral_scale 0.0 pi_integral_exponent 0.4 pi_integral_norm_max 0.3 step_threshold 0.0 first_step_threshold 0.00002 max_frequency 900000000 clock_servo pi sanity_freq_limit 200000000 ntpshm_segment 0 # # Transport options # transportSpecific 0x0 ptp_dst_mac 01:1B:19:00:00:00 p2p_dst_mac 01:80:C2:00:00:0E udp_ttl 1 udp6_scope 0x0E uds_address /var/run/ptp4l # # Default interface options # clock_type OC network_transport UDPv4 delay_mechanism E2E time_stamping hardware tsproc_mode filter delay_filter moving_median delay_filter_length 10 egressLatency 0 ingressLatency 0 boundary_clock_jbod 0 # # Clock description # productDescription ;; revisionData ;; manufacturerIdentity 00:00:00 userDescription ; timeSource 0xA0 unicast_req_duration 60 [unicast_master_table] table_id 1 logQueryInterval 2 UDPv4 169.254.32.10 [ens1f1] unicast_master_table 1 Thanks, Steven From: Geva, Erez <erez.geva....@siemens.com> Sent: Thursday, January 10, 2019 1:57 AM To: Sun, Steven (NSB - CN/Qingdao) <steven....@nokia-sbell.com>; Linuxptp-devel@lists.sourceforge.net Subject: RE: linuxptp2.02 processing the extra 4 bytes which is not in PTP length Hi, It happens with one message "Delay Response" in the length 104 bytes. Did you check your VLAN, may be the VLAN add the 4 bytes? Did you see this behavior without using VLAN? What is your ptp4l configuration? Erez ________________________________ From: Sun, Steven (NSB - CN/Qingdao) [steven....@nokia-sbell.com] Sent: 09 January 2019 19:18 To: Linuxptp-devel@lists.sourceforge.net<mailto:Linuxptp-devel@lists.sourceforge.net> Subject: [Linuxptp-devel] linuxptp2.02 processing the extra 4 bytes which is not in PTP length Hello all, Glad to join the linuxptp devel mail list. We met an issue about ptp4l processing 4 more bytes which is not in PTP but in UDP payload. Ptp4l keep reporting failure log as below: Jan 07 12:11:58 slot-15 ptp4l[12876]: [247083.836] port 1: new foreign master fcaf6a.fffe.029a96-1 Jan 07 12:11:59 slot-15 ptp4l[12876]: [247084.572] selected local clock 48df37.fffe.3a9f51 as best master Jan 07 12:12:02 slot-15 ptp4l[12876]: [247087.836] selected best master clock fcaf6a.fffe.029a96 Jan 07 12:12:02 slot-15 ptp4l[12876]: [247087.836] running in a temporal vortex Jan 07 12:12:02 slot-15 ptp4l[12876]: [247087.836] port 1: LISTENING to UNCALIBRATED on RS_SLAVE Jan 07 12:12:02 slot-15 ptp4l[12876]: [247087.962] port 1: bad message Jan 07 12:12:02 slot-15 ptp4l[12876]: [247088.031] port 1: bad message Jan 07 12:12:03 slot-15 ptp4l[12876]: [247088.985] port 1: bad message These 4 bytes is out of the PTP length which defined in PTP header. I checked they are included in the UDP payload, so should not be FCS bytes. Not sure about the purpose of these 4 bytes but PTP may should not process them. [cid:image001.png@01D4A8CD.DB66B390] Thanks, Steven
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