Re: [Linuxptp-users] PTP packets not being acted upon by RHEL 7 server
PTP IEEE 1588 stack for Linux
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From: Dale S. <dal...@gm...> - 2016-12-16 00:37:56
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On Thu, Dec 15, 2016 at 7:27 PM, Keller, Jacob E <jac...@in...> wrote: > > Additionally, check that wireshark and tcpdump are not running in promiscuous mode when you test. It is possible that you have a firewall (firewalld for example) disabling the packets, but when you run tcpdump in promiscuous mode it will be bypassing the firewall. This I believe is the default firewall settings for RHEL 7 so you should make sure you change that in firewalld to enable the traffic. Yep.. Something very similar happened to me before. mdns was just not working and when I fired up wireshark, it *magically* got fixed. I needed to all "allmulti" to the iface. Check the interface with either ifconfig or ip link and make sure MULTICAST is enabled.... -Dale |