sortedSizes := func(maskSizeIPv4, maskSizeIPv6 int) []int {
		nodeMaskCIDRs := make([]int, len(clusterCIDRs))

		for idx, clusterCIDR := range clusterCIDRs {
			if netutils.IsIPv6CIDR(clusterCIDR) {
				nodeMaskCIDRs[idx] = maskSizeIPv6
			} else {
				nodeMaskCIDRs[idx] = maskSizeIPv4
			}
		}
		return nodeMaskCIDRs
	}

		primaryClusterIPAllocator, err = ipallocator.NewMetaAllocator(
			networkingv1alphaClient,
			c.Informers.Networking().V1alpha1().ServiceCIDRs(),
			c.Informers.Networking().V1alpha1().IPAddresses(),
			netutils.IsIPv6CIDR(&serviceClusterIPRange),
		)
		if err != nil {
			return rangeRegistries{}, nil, nil, nil, fmt.Errorf("cannot create cluster IP allocator: %v", err)
		}
	}
	primaryClusterIPAllocator.EnableMetrics()

	sortedSizes := func(maskSizeIPv4, maskSizeIPv6 int) []int {
		nodeMaskCIDRs := make([]int, len(clusterCIDRs))

		for idx, clusterCIDR := range clusterCIDRs {
			if netutils.IsIPv6CIDR(clusterCIDR) {
				nodeMaskCIDRs[idx] = maskSizeIPv6
			} else {
				nodeMaskCIDRs[idx] = maskSizeIPv4
			}
		}
		return nodeMaskCIDRs
	}

	max := netutils.RangeSize(cidr)
	base := netutils.BigForIP(cidr.IP)
	rangeSpec := cidr.String()
	var family api.IPFamily

	if netutils.IsIPv6CIDR(cidr) {
		family = api.IPv6Protocol
		// Limit the max size, since the allocator keeps a bitmap of that size.
		if max > 65536 {
			max = 65536
		}
	} else {
		family = api.IPv4Protocol

	}

	// TODO: use the utils/net function once is available
	size := hostsPerNetwork(cidr)
	var family api.IPFamily
	if netutils.IsIPv6CIDR(cidr) {
		family = api.IPv6Protocol
	} else {
		family = api.IPv4Protocol
	}
	// Caching the first, offset and last addresses allows to optimize
	// the search loops by using the netip.Addr iterator instead