int ip6_address_compare (ip6_address_t * a1, ip6_address_t * a2);
clib_error_t *ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst,
int ip6_address_compare (ip6_address_t * a1, ip6_address_t * a2);
clib_error_t *ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst,