Re: [Linuxptp-users] Error accessing /dev/ptp0
PTP IEEE 1588 stack for Linux
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Re: [Linuxptp-users] Error accessing /dev/ptp0
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From: Ronex D. <ron...@ya...> - 2014-08-07 13:41:24
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Hello, 1) PTP master/slave is not working while I tried to run it over same host. Following messages are displayed repeatedly: ptp4l[269.788]: sendto failed: No message of desired type ptp4l[269.789]: port 1: send sync failed ptp4l[269.789]: port 1: MASTER to FAULTY on FAULT_DETECTED (FT_UNSPECIFIED) ptp4l[269.861]: driver changed our HWTSTAMP options ptp4l[269.863]: tx_type 1 not 1 ptp4l[269.863]: rx_filter 1 not 12 ptp4l[269.864]: selected best master clock 169acc.fffe.7d54bd ptp4l[277.043]: driver changed our HWTSTAMP options ptp4l[277.046]: tx_type 1 not 1 ptp4l[277.046]: rx_filter 1 not 12 ptp4l[277.047]: selected best master clock 169acc.fffe.7d54bd ptp4l[284.513]: driver changed our HWTSTAMP options ptp4l[284.514]: tx_type 1 not 1 ptp4l[284.515]: rx_filter 1 not 12 ptp4l[284.516]: selected best master clock 169acc.fffe.7d54bd ptp4l[285.796]: driver changed our HWTSTAMP options ptp4l[285.798]: tx_type 1 not 1 ptp4l[285.798]: rx_filter 1 not 12 ptp4l[285.799]: port 1: FAULTY to LISTENING on FAULT_CLEARED ptp4l[290.943]: driver changed our HWTSTAMP options ptp4l[290.944]: tx_type 1 not 1 ptp4l[290.945]: rx_filter 1 not 12 ptp4l[290.946]: selected best master clock 169acc.fffe.7d54bd 2) And Can you please suggest How I could run it on two different linux host, Do I need to use some kind of multicast forwarding for that ? I tried to run PTP master behind, 10.0.0.1/24 and slave behind 10.0.1.1/24 +----------------------+ +----------------------+ | Linux Guest Host-1 | | Linux Guest Host-2 | | __________ | | __________ | | | | | | | | | | | eth0 | | | | eth0 | | | | 10.2.0.2 | | | | 10.1.0.2 | | | |__________| | | |__________| | | | | | +---------+------------+ +----------+-----------+ ____|____ ___|_____ | | | | |piface_1 | | piface_2| |10.2.0.2 | |10.2.0.1 | |_________| |_________| piface_1 and piface_2 exist on the host, where I am running two linux guest host. Now, I tried to run ptp master on linux guest host-1 ./ptp4l -i eth0 -m -q And ptp slave on linux guest host-2, ./ptp4l -i eth0 -m -s -q But On wireshark I could see sync, Follow_up messages from master(captured for piface_1) and on slave(captured over piface_2) I could just see IGMP massages, I think multicast frames from master doesn't reach to the slave. Am I missing here some configuration ? Regards, Ronex On Thursday, 7 August 2014 12:38 AM, Richard Cochran <ric...@gm...> wrote: On Thu, Aug 07, 2014 at 01:51:18AM +0800, Ronex Dicapriyo wrote: > And by `ptp subsystem`, Do you refer "<kernel_source>/drivers/ptp" ? Yes, some important files for the ptp subsystem are in drivers/ptp, but there are also drivers there. Overall it is not as simple you try to make it. When we say "driver" this can mean an Ethernet MAC driver, a PHY driver, or a PTP Hardware Clock driver. Also, the core ptp code is mostly in drivers/ptp, but there are some bits in the core networking code as well. You have the source. Now go and read it! > Does it sends ptp messages (like sync, delay etc..) to all the system in local LAN, and all the local IP's(Private and Public ethernet interface present on same host) ? It sends multicast messages on the given interface. > Now How am I supposed to check output, I believe log messages along with wireshark might can help here. You can use wireshark, sure. But the slave ptp4l program should print out the current time offset, once per second. > Does it stops after syncing the time between slave and master device ? No. > 3) Is it possible to establish ptp communication on one to one basis, means master sends ptp messages to slave IP,where ptp4l slave application is listening for master IP address ? Unicast messaging is possible with the protocol, but it is not implemented in linuxptp. Thanks, Richard |
