A Linux host with two or more Ethernet interfaces on the same subnet may cause the Address Resolution Protocol (ARP) flux issue when a machine responds to the ARP requests from both Ethernet interfaces of the same subnet.
To avoid the ARP flux issue:
Log in to the affected node.
Set the following network parameters:
sysctl -w net.ipv4.conf.all.arp_ignore=2
sysctl -w net.ipv6.conf.all.arp_ignore=2
This configuration enables responding to the ARP requests only if the target IP is a local address that is configured on the incoming interface and, together with the sender IP address, is part of the same subnet on this interface.