Update is_virtual_network_interface.html.markdown

Author: uibm

website/docs/r/is_virtual_network_interface.html.markdown

@@ -29,6 +29,8 @@ You can specify the following arguments for this resource.
 - `allow_ip_spoofing` - (Optional, Boolean) Indicates whether source IP spoofing is allowed on this interface. If `false`, source IP spoofing is prevented on this interface. If `true`, source IP spoofing is allowed on this interface.
 - `auto_delete` - (Optional, Boolean) Indicates whether this virtual network interface will be automatically deleted when`target` is deleted.
 - `enable_infrastructure_nat` - (Optional, Boolean) If `true`:- The VPC infrastructure performs any needed NAT operations.- `floating_ips` must not have more than one floating IP.If `false`:- Packets are passed unchanged to/from the network interface,  allowing the workload to perform any needed NAT operations.- `allow_ip_spoofing` must be `false`.- If the virtual network interface is attached:  - The target `resource_type` must be `bare_metal_server_network_attachment`.  - The target `interface_type` must not be `hipersocket`.
+
+~> **NOTE** to update/add new `ips` only existing `reserved_ip` is supported, new reserved_ip creation on update is not supported as it leads to unmanaged(dangling) reserved ips.
 - `ips` - (Optional, List) The reserved IPs bound to this virtual network interface.May be empty when `lifecycle_state` is `pending`.
 	Nested schema for **ips**:
 	- `address` - (Required, String) The IP address.If the address has not yet been selected, the value will be `0.0.0.0`.This property may add support for IPv6 addresses in the future. When processing a value in this property, verify that the address is in an expected format. If it is not, log an error. Optionally halt processing and surface the error, or bypass the resource on which the unexpected IP address format was encountered.