I installed linuxptp via
sudo yum install linuxptp
I read everything regarding reverse path filtering and configured correctly:
cat /proc/sys/net/ipv4/conf/default/rp_filter reports 0
cat /proc/sys/net/ipv4/conf/all/rp_filter reports 0
cat /proc/sys/net/ipv4/conf/ens1/rp_filter reports 0
ens1 is Intel I210.
But there’s no IPv4 multicast traffic arriving (can be sent though). Reading timestamps via the error queue does work though, but no multicast PTP messages can be read.
Could anybody be so kind and explain how one can make ptp4l work on AlmaLinux 9.1?