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Re: Static interface routes for IP address on different subnet doesn't send an ARP who-has

You should look at the actual routes in the kernel on FreeBSD, with
route -n monitor, and understand all the flags and sockaddrs.  Please
also send the result of 'netstat -nr' on FreeBSD.

As David suggests, you may need a /32 cloning route.

Sorry, but you are basically doing something that does not conform to
Internet standards, and that will probably require some code reading.  I
think we'd be inclined to take a change that enables doing this
(assuming it doesn't break other things), and it's quite possible that
kernel code changes will be required.

I would also suggest looking through the history of FreeBSD to see if
they made an explicit change to support this multiple-/32-on-a-wire

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