Maximum ARP Entries

Does anyone know if there is a maximum number of ARP entries/ adjacencies that FBSD can handle before recycling? I want to route several thousand ips direct to some interfaces so it will have 3-4k ARP entries.. I'm curious because in Linux I have to set
the sysctl net.ipv4.neigh threshholds a lot higher or it bombs with 'too many neighbors'... I don't see a setting like this in BSD sysctl .



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