diff --git a/pkg/apis/hive/v1alpha1/installconfig.go b/pkg/apis/hive/v1alpha1/installconfig.go
index 18f9f5e9d8f..2b6a7adc643 100644
--- a/pkg/apis/hive/v1alpha1/installconfig.go
+++ b/pkg/apis/hive/v1alpha1/installconfig.go
@@ -4,6 +4,8 @@ import (
 	corev1 "k8s.io/api/core/v1"
 
 	"net"
+
+	"github.com/openshift/installer/pkg/ipnet"
 )
 
 // InstallConfig is the configuration for an OpenShift install.
@@ -72,7 +74,8 @@ type AWSPlatform struct {
 	DefaultMachinePlatform *AWSMachinePoolPlatform `json:"defaultMachinePlatform,omitempty"`
 
 	// VPCCIDRBlock
-	VPCCIDRBlock string `json:"vpcCIDRBlock"`
+	// +optional
+	VPCCIDRBlock *ipnet.IPNet `json:"vpcCIDRBlock,omitempty"`
 }
 
 // LibvirtPlatform stores all the global configuration that
diff --git a/pkg/install/convertconfig.go b/pkg/install/convertconfig.go
index 31f22e23447..48cd94d4e12 100644
--- a/pkg/install/convertconfig.go
+++ b/pkg/install/convertconfig.go
@@ -18,7 +18,6 @@ package install
 
 import (
 	"fmt"
-	"net"
 
 	hivev1 "github.com/openshift/hive/pkg/apis/hive/v1alpha1"
 
@@ -97,13 +96,9 @@ func GenerateInstallConfig(cd *hivev1.ClusterDeployment, sshKey, pullSecret stri
 		SSHKey:     sshKey,
 		BaseDomain: spec.Config.BaseDomain,
 		Networking: types.Networking{
-			Type: networkType,
-			ServiceCIDR: ipnet.IPNet{
-				IPNet: parseCIDR(spec.Config.Networking.ServiceCIDR),
-			},
-			PodCIDR: &ipnet.IPNet{
-				IPNet: parseCIDR(spec.Config.Networking.PodCIDR),
-			},
+			Type:        networkType,
+			ServiceCIDR: *parseCIDR(spec.Config.Networking.ServiceCIDR),
+			PodCIDR:     parseCIDR(spec.Config.Networking.PodCIDR),
 		},
 		PullSecret: pullSecret,
 		Platform:   platform,
@@ -112,12 +107,11 @@ func GenerateInstallConfig(cd *hivev1.ClusterDeployment, sshKey, pullSecret stri
 	return ic, nil
 }
 
-func parseCIDR(s string) net.IPNet {
+func parseCIDR(s string) *ipnet.IPNet {
 	if s == "" {
-		return net.IPNet{}
+		return &ipnet.IPNet{}
 	}
-	_, cidr, _ := net.ParseCIDR(s)
-	return *cidr
+	return ipnet.MustParseCIDR(s)
 }
 
 func convertNetworkingType(hnt hivev1.NetworkType) (netopv1.NetworkType, error) {
diff --git a/pkg/install/convertconfig_test.go b/pkg/install/convertconfig_test.go
index bd7c722f0aa..b6a8929263b 100644
--- a/pkg/install/convertconfig_test.go
+++ b/pkg/install/convertconfig_test.go
@@ -43,7 +43,6 @@ const (
 	adminPassword   = "adminpassword"
 	adminSSHKey     = "adminSSH"
 	pullSecret      = "pullSecret"
-	vpcCIDRBlock    = "10.1.0.0/16"
 	awsInstanceType = "fake-aws-type"
 	awsRegion       = "us-east-1"
 	iamRoleName     = "rolename"
@@ -52,6 +51,10 @@ const (
 	ec2VolType      = "sometype"
 )
 
+var (
+	vpcCIDRBlock = ipnet.MustParseCIDR("10.1.0.0/16")
+)
+
 func buildValidClusterDeployment() *hivev1.ClusterDeployment {
 	replicas := int64(3)
 	return &hivev1.ClusterDeployment{
@@ -137,13 +140,9 @@ func buildBaseExpectedInstallConfig() *installtypes.InstallConfig {
 		PullSecret: pullSecret,
 		Networking: installtypes.Networking{
 			// TODO: Hardcoded to match installer for now.
-			Type: "OpenshiftSDN",
-			ServiceCIDR: ipnet.IPNet{
-				IPNet: parseCIDR("172.30.0.0/16"),
-			},
-			PodCIDR: &ipnet.IPNet{
-				IPNet: parseCIDR("10.128.0.0/14"),
-			},
+			Type:        "OpenshiftSDN",
+			ServiceCIDR: *ipnet.MustParseCIDR("172.30.0.0/16"),
+			PodCIDR:     ipnet.MustParseCIDR("10.128.0.0/14"),
 		},
 		Platform: installtypes.Platform{
 			AWS: &installawstypes.Platform{