for _, fam := range ipFamilies {
		switch fam {
		case api.IPv4Protocol:
			_, cidr, _ := netutils.ParseCIDRSloppy("10.0.0.0/16")
			ipAllocs[fam] = makeIPAllocator(cidr)
		case api.IPv6Protocol:
			_, cidr, _ := netutils.ParseCIDRSloppy("2000::/108")
			ipAllocs[fam] = makeIPAllocator(cidr)
		default:
			t.Fatalf("Unknown IPFamily: %v", fam)
		}
	}