diff --git a/api/src/main/java/org/apache/cloudstack/api/command/admin/network/NetworkOfferingBaseCmd.java b/api/src/main/java/org/apache/cloudstack/api/command/admin/network/NetworkOfferingBaseCmd.java
index 1c832b7217ef..9e5aed091913 100644
--- a/api/src/main/java/org/apache/cloudstack/api/command/admin/network/NetworkOfferingBaseCmd.java
+++ b/api/src/main/java/org/apache/cloudstack/api/command/admin/network/NetworkOfferingBaseCmd.java
@@ -153,11 +153,8 @@ public abstract class NetworkOfferingBaseCmd extends BaseCmd {
             since = "4.20.0")
     private Boolean nsxSupportsInternalLbService;
 
-    @Parameter(name = ApiConstants.NETWORK_MODE,
-            type = CommandType.STRING,
-            description = "Indicates the mode with which the network will operate. Valid option: NATTED or ROUTED",
-            since = "4.20.0")
-    private String networkMode;
+   @Parameter(name = ApiConstants.NETWORK_MODE, type = CommandType.STRING, required = true, description = "the network mode for the network offering")
+   private String networkMode;
 
     @Parameter(name = ApiConstants.FOR_TUNGSTEN,
             type = CommandType.BOOLEAN,
diff --git a/api/src/main/java/org/apache/cloudstack/api/command/admin/vpc/CreateVPCOfferingCmd.java b/api/src/main/java/org/apache/cloudstack/api/command/admin/vpc/CreateVPCOfferingCmd.java
index 2b934a60da7a..e75f8b258d68 100644
--- a/api/src/main/java/org/apache/cloudstack/api/command/admin/vpc/CreateVPCOfferingCmd.java
+++ b/api/src/main/java/org/apache/cloudstack/api/command/admin/vpc/CreateVPCOfferingCmd.java
@@ -144,10 +144,7 @@ public class CreateVPCOfferingCmd extends BaseAsyncCreateCmd {
             since = "4.16")
     private Boolean enable;
 
-    @Parameter(name = ApiConstants.NETWORK_MODE,
-            type = CommandType.STRING,
-            description = "Indicates the mode with which the network will operate. Valid option: NATTED or ROUTED",
-            since = "4.20.0")
+    @Parameter(name = ApiConstants.NETWORK_MODE, type = CommandType.STRING, required = true, description = "the network mode for the VPC offering")
     private String networkMode;
 
     @Parameter(name = ApiConstants.SPECIFY_AS_NUMBER, type = CommandType.BOOLEAN, since = "4.20.0",
diff --git a/ui/src/views/offering/AddNetworkOffering.vue b/ui/src/views/offering/AddNetworkOffering.vue
index 995b81ce68c6..b36fd82b6677 100644
--- a/ui/src/views/offering/AddNetworkOffering.vue
+++ b/ui/src/views/offering/AddNetworkOffering.vue
@@ -711,6 +711,8 @@ export default {
       })
       this.rules = reactive({
         name: [{ required: true, message: this.$t('message.error.name') }],
+        // ADD THIS LINE:
+        networkmode: [{ required: true, message: this.$t('message.error.select') }],
         networkrate: [{ type: 'number', validator: this.validateNumber }],
         serviceofferingid: [{ required: true, message: this.$t('message.error.select') }],
         domainid: [{ type: 'array', required: true, message: this.$t('message.error.select') }],
diff --git a/ui/src/views/offering/AddVpcOffering.vue b/ui/src/views/offering/AddVpcOffering.vue
index 780da6638f8e..470b56920628 100644
--- a/ui/src/views/offering/AddVpcOffering.vue
+++ b/ui/src/views/offering/AddVpcOffering.vue
@@ -366,6 +366,8 @@ export default {
       })
       this.rules = reactive({
         name: [{ required: true, message: this.$t('message.error.name') }],
+        // ADD THIS LINE:
+        networkmode: [{ required: true, message: this.$t('message.error.select') }],
         domainid: [{ type: 'array', required: true, message: this.$t('message.error.select') }],
         zoneid: [{
           type: 'array',