I see the topmost masked IP address has a /16 netmask. The link-local 169.254.?.? addresses typically have that mask. They are used by
avahi-daemon for zero-configuration networking: the auto-detection of printers and other shareable services in other devices in the same network segment. Oracle Clusterware / Grid technology also uses the link-local addresses.
Otherwise, I think it would be fairly unlikely to see a /16 mask anywhere in modern IPv4 networks.
avahi-daemon is enabled by default on modern RedHat/CentOS systems and many other Linux distributions.
avahi-daemon is not useful in a server, it is fairly common to disable it, in particular in servers that need to be highly available, in order to reduce system complexity and potential attack surface. It is possible that the system administrator had previously stopped
avahi-daemon. but not prevented it from starting at boot, so it probably was restarted when the system was rebooted.
Compare the outputs of
systemctl status avahi-daemon on all cluster nodes. If only the problem system indicates
avahi-daemon is running, you can stop it with
systemctl stop avahi-daemon and prevent it from starting at boot time with
systemctl disable avahi-daemon. This command is a "soft" disable: if some other
systemd service is marked as requiring
avahi-daemon and that service is configured to start at boot,
avahi-daemon would still be started automatically. It's kind of similar to placing a Windows service into "Manual" start-up mode.
The command for a "hard" disable (= "don't start this service for any reason, no matter what, even if it causes something else to not work") would be
systemctl mask <service-name>. This is the equivalent of setting a Windows service to a "Disabled" state. To allow the service to start again, you'd need
systemctl unmask <service-name>.
If you choose to fully disable
avahi-daemon, and you're using classic RedHat-style
/etc/sysconfig/network-scripts/ifcfg-* files for network configuration (instead of using NetworkManager), you may also want to add the line