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    Error due to multiple IP addresses

    When the PROFINET Controller is started, it checks the network for duplicate IP addresses. The operation of establishing the connection can be aborted with the error message "ARP multiple IP addresses" although there are actually no duplicate addresses. Linux systems with multiple Ethernet ports within the same network can be affected by this "ARP flux" effect.

    This can be corrected with this commands:

    sysctl -w net.ipv4.conf.all.arp_announce=1
sysctl -w net.ipv4.conf.all.arp_ignore=2