Like arp(8), this utility already uses the NetBSD 8 protocol for
talking to the operating system through routing sockets.
Like arp(8), this utility is not fully functional, due to limitations
of lwIP. While ndp(8) should provide a proper (read-only) view of the
contents of the Neighbor Discovery table, any attempts to modify the
table will fail. In addition, various other ndp(8) features are not
supported. On MINIX 3, the prefix and default router lists are not
managed by the operating system however, but rather by dhcpcd(8);
therefore, an implementation of the features related to those lists
would not provide any actual functionality.