Wenn es dasselbe Subnetz ist, dann leg einen Alias mit /32 an.
alias Establish an additional network address for this interface. This is sometimes useful when changing network numbers, and one wishes to accept packets addressed to the old interface. If the address is on the same subnet as the first network address for this interface, a non-conflicting netmask must be given. Usually 0xffffffff is most appropriate.
Aliase im selben Subnetz sollen laut FreeBSD-Doku mit /32 angelegt werden.https://man.freebsd.org/cgi/man.cgi?ifconfigCode: [Select]alias Establish an additional network address for this interface. This is sometimes useful when changing network numbers, and one wishes to accept packets addressed to the old interface. If the address is on the same subnet as the first network address for this interface, a non-conflicting netmask must be given. Usually 0xffffffff is most appropriate.