[Linuxptp-users] PTP not Sync with TDD base stations

[<gan...@la...>]

Dear Richard,

 

I have successfully implement the setup with ptp4l to sync TDD base station
and base station receives the ptp sync massages but after 2 second it lost
the ip clock which is sent by the server.

 

* PTP server and the base station in the same L2 broadcast domain

* Neo 6M gps module connected to the server via serial interface 

* interface card is Intel 82580 Gigabit Network Connection

 

My ptp4l configurations as follows,

 

[root@info ~]# cat /etc/ptp4l.conf 

[global]

verbose               1

time_stamping  hardware         

#priority1 127

#tx_timestamp_timeout 100

#[eno2]

#

# Default Data Set

#

twoStepFlag                      1

gmCapable                         1

slaveOnly                            0

priority1                               128

priority2                              128

domainNumber                 24

#utc_offset                        37

clockClass                            7

#clockAccuracy                 0xFE

clockAccuracy                   0x20

#offsetScaledLogVariance        0xFFFF

offsetScaledLogVariance 0xD2AF

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              1

G.8275.portDS.localPriority     128

#

# Run time options

#

assume_two_step         0

logging_level                      6

path_trace_enabled      0

follow_up_info                  0

hybrid_e2e                         0

inhibit_multicast_service       0

net_sync_monitor            0

tc_spanning_tree              0

tx_timestamp_timeout    1

unicast_listen          0

unicast_master_table    0

unicast_req_duration    3600

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           0

clock_servo             pi

sanity_freq_limit       200000000

ntpshm_segment          24

#

# 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       L2

delay_mechanism         E2E

time_stamping           hardware

tsproc_mode             filter

delay_filter            moving_median

delay_filter_length     10

egressLatency           1500

ingressLatency          0

boundary_clock_jbod     0

#

# Clock description

#

productDescription      ;;

revisionData            ;;

manufacturerIdentity    00:00:00

userDescription         ;

timeSource              0xA0

 

[enp3s0f3]

transportSpecific       1

 

[root@info ~]#

 

==============================================================

 

[root@info ~]# tail -f /var/log/messages

Oct 31 15:46:11 info phc2sys: [621627.853] enp3s0f3 sys offset       -12 s2
freq      +1 delay   1530

Oct 31 15:46:12 info phc2sys: [621628.853] enp3s0f3 sys offset       -11 s2
freq      -2 delay   1533

Oct 31 15:46:13 info phc2sys: [621629.853] enp3s0f3 sys offset        -8 s2
freq      -2 delay   1537

Oct 31 15:46:14 info phc2sys: [621630.853] enp3s0f3 sys offset         0 s2
freq      +4 delay   1530

Oct 31 15:46:15 info phc2sys: [621631.854] enp3s0f3 sys offset        -4 s2
freq      -0 delay   1530

Oct 31 15:46:16 info phc2sys: [621632.854] enp3s0f3 sys offset        -3 s2
freq      -1 delay   1530

 

 

==========================================================

 

 

At the same time I tried to capture the interface traffic that associated
with the server. Screen shot as below.

 



 

 

Do you have any suggestion for that ?

 

Best Regards,

Ganganath