I have found the solution. For people experiencing the same issue here is
what I did wrong :
1) In my environment, the domainNumber was not the default one and so I had
to modify it.
2) I was using a separate interface, not my regular internet interface
(en0). Since I was using PTP over UDP, the interface must have an IP !
Thank you.
2018-04-12 16:07 GMT+02:00 Florent Lambert <florent.lamber...@gmail.com>:
> Hello,
>
> I try to be PTP synchronized with my network over UDP. Although I receive
> PTP packets (tested with tcpdump, see below for capture), when I run ptp4l,
> the local clock is elected as best master. It is as if there was no other
> master clock in the network. I can't find why.
>
>
> Here are some details of my environment :
> NIC : Intel X710
> NIC driver : i40e 2.4.6 (latest, compiled with CFLAGS_EXTRA="-DI40E_PTP")
> NIC firmware : NVM 6.01 (latest)
> Kernel version : 3.10.0-693.21.1.e17.x86_64
> CentOS 7.4.1708
> linuxptp : 1.8
>
> I tried with linux ptp from 1.6 to 1.9.2.
> I tried with different i40e driver/NIC firmware/kernel/linuxptp matching
> version.
>
> I know for sure that in my network, there is a working grand master. There
> is a switch in between me and the master but the switch is normally
> properly configurated.
>
> The config I use for ptp4l match the grand master's one.
>
> Here is the output of ptp4l :
>
> ptp4l -i interface -f /etc/ptp4l.conf -smq
>
> ptp4l[5042.815]: selected /dev/ptp1 as PTP clock
> ptp4l[5042.816]: port 1: INITIALIZING to LISTENING on INITIALIZE
> ptp4l[5042.816]: port 0: INITIALIZING to LISTENING on INITIALIZE
> ptp4l[5042.816]: port 1: link up
> ptp4l[5043.674]: selected best master clock 3cfdfe.fffe.a13059
> ptp4l[5044.576]: selected best master clock 3cfdfe.fffe.a13059
> ptp4l[5045.573]: selected best master clock 3cfdfe.fffe.a13059
>
> I get the same exact output if i don't even use a config file.
>
> The MAC address 3c:fd:fe:a1:30:59 is the MAC adress of the specified
> interface. (The interface that should be slave!)
> I don't have any logs like "new foreign master" ...
>
> Here is what a tcpdump on the interface looks like :
>
> 15:59:18.470412 IP 10.22.8.19.ptp-general > 224.0.1.129.ptp-general: UDP,
> length 60
> 15:59:18.471144 IP 10.22.8.3.ptp-general > 224.0.1.129.ptp-general: UDP,
> length 60
> 15:59:18.471441 IP 10.22.8.19.ptp-general > 224.0.1.129.ptp-general: UDP,
> length 60
> 15:59:18.472071 IP 10.22.8.19.ptp-general > 224.0.1.129.ptp-general: UDP,
> length 60
> 15:59:18.472552 IP 10.22.8.3.ptp-general > 224.0.1.129.ptp-general: UDP,
> length 60
> 15:59:18.473185 IP 10.22.8.3.ptp-general > 224.0.1.129.ptp-general: UDP,
> length 60
> 15:59:18.473656 IP 10.22.8.19.ptp-general > 224.0.1.129.ptp-general: UDP,
> length 60
> 15:59:18.476813 IP 10.195.1.250.ptp-general > 224.0.1.129.ptp-general:
> UDP, length 100
> 15:59:18.479403 IP 10.22.8.3.ptp-general > 224.0.1.129.ptp-general: UDP,
> length 60
> 15:59:18.479816 IP 10.22.8.19.ptp-general > 224.0.1.129.ptp-general: UDP,
> length 60
> 15:59:18.482479 IP 10.195.1.250.ptp-general > 224.0.1.129.ptp-general:
> UDP, length 100
> 15:59:18.485089 IP 10.22.8.3.ptp-general > 224.0.1.129.ptp-general: UDP,
> length 60
> 15:59:18.485488 IP 10.22.8.19.ptp-general > 224.0.1.129.ptp-general: UDP,
> length 60
> 15:59:18.487728 IP 10.195.1.250.ptp-general > 224.0.1.129.ptp-general:
> UDP, length 100
> 15:59:18.490379 IP 10.22.8.3.ptp-general > 224.0.1.129.ptp-general: UDP,
> length 60
> 15:59:18.490897 IP 10.22.8.19.ptp-general > 224.0.1.129.ptp-general: UDP,
> length 60
> 15:59:18.491309 IP 172.27.105.251.ptp-event > 224.0.1.129.ptp-event: UDP,
> length 44
> 15:59:18.518822 IP 172.27.105.251.ptp-general > 224.0.1.129.ptp-general:
> UDP, length 44
> 15:59:18.616328 IP 172.27.105.251.ptp-event > 224.0.1.129.ptp-event: UDP,
> length 44
> 15:59:18.620510 IP 172.27.105.251.ptp-general > 224.0.1.129.ptp-general:
> UDP, length 44
>
>
> I must be missing something. Any help is appreciated. I can provide other
> information if needed !
>
> Thanks.
>
>
>
>
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