diff --git a/docs/data-sources/foreman_subnet.md b/docs/data-sources/foreman_subnet.md
index 3957e3f..dd2090a 100644
--- a/docs/data-sources/foreman_subnet.md
+++ b/docs/data-sources/foreman_subnet.md
@@ -40,11 +40,11 @@ The following attributes are exported:
 - `httpboot_id` - HTTPBoot Proxy ID to use within this subnet
 - `ipam` - IP address auto-suggestion for this subnet. Valid values include: `"DHCP"`, `"Internal DB"`, `"Random DB"`,`"None"`.
 - `mask` - Netmask for this subnet.
-- `mtu` - MTU value for the subnet
+- `mtu` - MTU value for the subnet.
 - `name` - Name of a subnetwork.
 - `network` - Subnet network.
 - `network_address` - The Subnets CIDR in the format 169.254.0.0/16
-- `network_type` - Type or protocol, IPv4 or IPv6, defaults to IPv4.
+- `network_type` - Type or protocol, IPv4 or IPv6.
 - `template_id` - Template HTTP(S) Proxy ID to use within this subnet
 - `tftp_id` - TFTP Proxy ID to use within this subnet
 - `to` - Ending IP address for IP auto suggestion.
diff --git a/docs/resources/foreman_subnet.md b/docs/resources/foreman_subnet.md
index 66cbb79..15403b5 100644
--- a/docs/resources/foreman_subnet.md
+++ b/docs/resources/foreman_subnet.md
@@ -10,9 +10,13 @@ Foreman representation of a subnetwork.
 ```
 # Autogenerated example with required keys
 resource "foreman_subnet" "example" {
+  boot_mode = "DHCP"
+  ipam = "DHCP"
   mask = "255.255.255.0"
+  mtu = "1500"
   name = "10.228.247.0 BO1"
   network = "10.228.247.0"
+  network_type = "IPv4"
 }
 ```
 
@@ -22,7 +26,7 @@ resource "foreman_subnet" "example" {
 The following arguments are supported:
 
 - `bmc_id` - (Optional) BMC Proxy ID to use within this subnet
-- `boot_mode` - (Optional) Default boot mode for instances assigned to this subnet. Values include: `"Static"`, `"DHCP"`.
+- `boot_mode` - (Required) Default boot mode for instances assigned to this subnet. Values include: `"Static"`, `"DHCP"`.
 - `description` - (Optional) Description of the subnet
 - `dhcp_id` - (Optional) DHCP Proxy ID to use within this subnet
 - `dns_primary` - (Optional) Primary DNS server for this subnet.
@@ -31,13 +35,13 @@ The following arguments are supported:
 - `from` - (Optional) Start IP address for IP auto suggestion.
 - `gateway` - (Optional) Gateway server to use when connecting/communicating to anything not on the same network.
 - `httpboot_id` - (Optional) HTTPBoot Proxy ID to use within this subnet
-- `ipam` - (Optional) IP address auto-suggestion for this subnet. Valid values include: `"DHCP"`, `"Internal DB"`, `"Random DB"`,`"None"`.
+- `ipam` - (Required) IP address auto-suggestion for this subnet. Valid values include: `"DHCP"`, `"Internal DB"`, `"Random DB"`,`"None"`.
 - `mask` - (Required) Netmask for this subnet.
-- `mtu` - (Optional) MTU value for the subnet
+- `mtu` - (Required) MTU value for the subnet.
 - `name` - (Required) Subnet name.
 - `network` - (Required) Subnet network.
 - `network_address` - (Optional) The Subnets CIDR in the format 169.254.0.0/16
-- `network_type` - (Optional) Type or protocol, IPv4 or IPv6, defaults to IPv4.
+- `network_type` - (Required) Type or protocol, IPv4 or IPv6.
 - `template_id` - (Optional) Template HTTP(S) Proxy ID to use within this subnet
 - `tftp_id` - (Optional) TFTP Proxy ID to use within this subnet
 - `to` - (Optional) Ending IP address for IP auto suggestion.
@@ -60,11 +64,11 @@ The following attributes are exported:
 - `httpboot_id` - HTTPBoot Proxy ID to use within this subnet
 - `ipam` - IP address auto-suggestion for this subnet. Valid values include: `"DHCP"`, `"Internal DB"`, `"Random DB"`,`"None"`.
 - `mask` - Netmask for this subnet.
-- `mtu` - MTU value for the subnet
+- `mtu` - MTU value for the subnet.
 - `name` - Subnet name.
 - `network` - Subnet network.
 - `network_address` - The Subnets CIDR in the format 169.254.0.0/16
-- `network_type` - Type or protocol, IPv4 or IPv6, defaults to IPv4.
+- `network_type` - Type or protocol, IPv4 or IPv6.
 - `template_id` - Template HTTP(S) Proxy ID to use within this subnet
 - `tftp_id` - TFTP Proxy ID to use within this subnet
 - `to` - Ending IP address for IP auto suggestion.
diff --git a/foreman/resource_foreman_subnet.go b/foreman/resource_foreman_subnet.go
index 8ef0c5b..61cd17f 100644
--- a/foreman/resource_foreman_subnet.go
+++ b/foreman/resource_foreman_subnet.go
@@ -92,7 +92,7 @@ func resourceForemanSubnet() *schema.Resource {
 
 			"ipam": {
 				Type:     schema.TypeString,
-				Optional: true,
+				Required: true,
 				ValidateFunc: validation.StringInSlice([]string{
 					"DHCP",
 					"Internal DB",
@@ -100,10 +100,13 @@ func resourceForemanSubnet() *schema.Resource {
 					"None",
 					// NOTE(ALL): false - do not ignore case when comparing values
 				}, false),
-				Description: "IP address auto-suggestion for this subnet. Valid " +
-					"values include: `\"DHCP\"`, `\"Internal DB\"`, `\"Random DB\"`,`\"None\"`.",
+				Description: fmt.Sprintf(
+					"IP address auto-suggestion for this subnet. Valid "+
+						"values include: `\"DHCP\"`, `\"Internal DB\"`, `\"Random DB\"`,`\"None\"`."+
+						"%s \"DHCP\"",
+					autodoc.MetaExample,
+				),
 			},
-
 			"from": {
 				Type:         schema.TypeString,
 				Optional:     true,
@@ -120,14 +123,18 @@ func resourceForemanSubnet() *schema.Resource {
 
 			"boot_mode": {
 				Type:     schema.TypeString,
-				Optional: true,
+				Required: true,
 				ValidateFunc: validation.StringInSlice([]string{
 					"Static",
 					"DHCP",
 					// NOTE(ALL): false - do not ignore case when comparing values
 				}, false),
-				Description: "Default boot mode for instances assigned to this subnet. " +
-					"Values include: `\"Static\"`, `\"DHCP\"`.",
+				Description: fmt.Sprintf(
+					"Default boot mode for instances assigned to this subnet. "+
+						"Values include: `\"Static\"`, `\"DHCP\"`."+
+						"%s \"DHCP\"",
+					autodoc.MetaExample,
+				),
 			},
 			"network_address": {
 				Type:        schema.TypeString,
@@ -140,9 +147,13 @@ func resourceForemanSubnet() *schema.Resource {
 				Description: "VLAN id that is in use in the subnet",
 			},
 			"mtu": {
-				Type:        schema.TypeInt,
-				Optional:    true,
-				Description: "MTU value for the subnet",
+				Type:     schema.TypeInt,
+				Required: true,
+				Description: fmt.Sprintf(
+					"MTU value for the subnet. "+
+						"%s \"1500\"",
+					autodoc.MetaExample,
+				),
 			},
 			"template_id": {
 				Type:        schema.TypeInt,
@@ -179,12 +190,16 @@ func resourceForemanSubnet() *schema.Resource {
 			},
 			"network_type": {
 				Type:     schema.TypeString,
-				Optional: true,
+				Required: true,
 				ValidateFunc: validation.StringInSlice([]string{
 					"IPv4",
 					"IPv6",
 				}, false),
-				Description: "Type or protocol, IPv4 or IPv6, defaults to IPv4.",
+				Description: fmt.Sprintf(
+					"Type or protocol, IPv4 or IPv6. "+
+						"%s \"IPv4\"",
+					autodoc.MetaExample,
+				),
 			},
 			"description": {
 				Type:        schema.TypeString,