# Two NICs (Wi-Fi wlo1, dock ethernet enp0s13f0u3u4u3) share 192.168.1.0/24.
# With the defaults (arp_ignore=0/arp_announce=0) the host answers ARP for any
# local address on any interface, so the subnet's mapping collapses onto
# whichever NIC replied last -- traffic aimed at the Wi-Fi IP lands on the dock,
# and the Wi-Fi path silently never gets exercised.
# 1 = only answer ARP for addresses configured on the receiving interface.
# 2 = always use the best local address for the target subnet when announcing.
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2