LS1028ARDB time synchronization problem

baiyu — Tue, 08 Sep 2020 08:51:23 GMT

Hi, Expert

One question from my side about two LS1028ARDB doing time synchronization, it seems the synchronization process failed. Details as below:

1. run "enetc_switch_cpu_port_with_bridge_without_ns.sh" on two LS1028ARDB separately, that means configure the boards to bridge mode. the system time and hardware time difference is 7days.

2. the swp2 port is connected directly between the two boards, run"ptp4l -i swp2 -f /etc/ptp4l_cfg/gPTP.cfg -m" separately on the two boards, the result shows they are not synchronized. detail configurations for time synchronization as below:

2.1 Slave gptp.cfg:

2.2 Master gptp.cfg

2.3 run"PTP4L" on master and slave:

2.3.1 master feedback:

2.3.2 slave feedback:

2.3.3 master swp2 capability:

2.3.4 slave swp2 capability:

@yipingwang

Re: LS1028ARDB time synchronization problem

yipingwang — Mon, 28 Sep 2020 08:29:46 GMT

Please refer to the following log.
board A:
root@localhost:~# ls /sys/bus/pci/devices/0000:00:00.5/net/
swp0  swp1  swp2  swp3
root@localhost:~# ip link add name switch type bridge
root@localhost:~# ip link set switch up
root@localhost:~# ip link set swp0 down
root@localhost:~# ip link set swp0 up
root@localhost:~# ip link set swp1 down
root@localhost:~# ip link set swp1 up
root@localhost:~# ip link set swp0 master switch
root@localhost:~# ip link set swp1 master switch
root@localhost:~# bridge link
7: swp0 state UP @eno2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master switch state forwarding priority 32 cost 4 
8: swp1 state LOWERLAYERDOWN @eno2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 master switch state disabled priority 32 cost 100 
root@localhost:~# ifconfig switch 1.1.1.1 netmask 255.255.255.0
root@localhost:~# ethtool -T swp0 |grep --color=never "PTP Hardware Clock"
PTP Hardware Clock: 1
root@localhost:~# ping 1.1.1.2 -c 10
PING 1.1.1.2 (1.1.1.2): 56 data bytes
64 bytes from 1.1.1.2: icmp_seq=0 ttl=64 time=0.748 ms
64 bytes from 1.1.1.2: icmp_seq=1 ttl=64 time=0.470 ms
round-trip min/avg/max/stddev = 0.464/0.511/0.748/0.081 ms
root@localhost:~# ptp4l -i swp0 -p /dev/ptp1 -2 -m
ptp4l[387.417]: selected /dev/ptp1 as PTP clock
ptp4l[387.452]: port 1: INITIALIZING to LISTENING on INITIALIZE
ptp4l[387.452]: port 0: INITIALIZING to LISTENING on INITIALIZE
ptp4l[387.453]: port 1: link up
ptp4l[393.514]: port 1: LISTENING to MASTER on ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES
ptp4l[393.514]: selected best master clock 00e00c.fffe.001302
ptp4l[393.514]: assuming the grand master role
ptp4l[394.361]: port 1: new foreign master 00e00c.fffe.001602-1
ptp4l[462.401]: port 1: link down
ptp4l[462.401]: port 1: MASTER to FAULTY on FAULT_DETECTED (FT_UNSPECIFIED)
ptp4l[462.436]: port 1: link down

board B:
root@localhost:~# ls /sys/bus/pci/devices/0000:00:00.5/net/
swp0  swp1  swp2  swp3
root@localhost:~# ip link add name switch type bridge
root@localhost:~# ip link set switch up
root@localhost:~# ip link set swp0 down
root@localhost:~# ip link set swp0 up
root@localhost:~# ip link set swp1 down
root@localhost:~# ip link set swp1 up
root@localhost:~# ip link set swp0 master switch
root@localhost:~# ip link set swp1 master switch
root@localhost:~# bridge link
6: swp0 state LOWERLAYERDOWN @eno2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 master switch state disabled priority 32 cost 100 
7: swp1 state UP @eno2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master switch state forwarding priority 32 cost 4 
root@localhost:~# ifconfig switch 1.1.1.2 netmask 255.255.255.0
root@localhost:~# ethtool -T swp0 |grep --color=never "PTP Hardware Clock"
PTP Hardware Clock: 1
root@localhost:~# ping 1.1.1.1 -c 10
PING 1.1.1.1 (1.1.1.1): 56 data bytes
64 bytes from 1.1.1.1: icmp_seq=0 ttl=64 time=0.524 ms
64 bytes from 1.1.1.1: icmp_seq=1 ttl=64 time=0.489 ms
root@localhost:~# ptp4l -i swp1 -p /dev/ptp1 -2 -m
ptp4l[280.895]: selected /dev/ptp1 as PTP clock
ptp4l[280.932]: port 1: INITIALIZING to LISTENING on INITIALIZE
ptp4l[280.932]: port 0: INITIALIZING to LISTENING on INITIALIZE
ptp4l[280.933]: port 1: link up
ptp4l[286.927]: port 1: new foreign master 00e00c.fffe.001302-1
ptp4l[287.771]: port 1: LISTENING to MASTER on ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES
ptp4l[287.771]: selected best master clock 00e00c.fffe.001602
ptp4l[287.772]: assuming the grand master role
ptp4l[290.927]: selected best master clock 00e00c.fffe.001302
ptp4l[290.927]: port 1: MASTER to UNCALIBRATED on RS_SLAVE
ptp4l[291.927]: master offset -106310946035 s0 freq      +0 path delay         0
ptp4l[292.927]: master offset -106310950168 s1 freq   -4132 path delay      2337
ptp4l[294.927]: master offset      -7002 s2 freq  -11134 path delay      1932

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