# Network Interfaces

## Introduction

Zadara Cloud Services UI supports network configurations for VM instances
based on the following common network concepts:

* **Subnets** - Standard IP subnet based on IP address and mask.
* **Network Interfaces** - A network interface is simply a specific IP
  address assigned to a VM instance.  To help maintain network consistency,
  a network interface can be defined as an IP on a specific subnet.  The
  UI will ensure that the selected IP is within the selected subnet.

## Creating Network Interfaces

**To define a network interface:**

1. Navigate to the **Networking > Network Interfaces** view.
2. From the top toolbar, click **Create**.
3. In the **Create Elastic Network Interface** dialog, enter the following:
   * **Name** - name of the network interface.
   * **Description** - optional description of the network interface.
   * **VPC** - VPC on which the network interface should be assigned.
   * **Subnet** - select from an existing subnet configured for the VPC or
     define a new subnet to be added to the VPC.
   * **Private IP** - select private IP within the subnet defined above.
   * **Security Groups** - select security group to control the traffic on
     the network interface.

## Network Interface Operations

After creation of a network interface, it will be displayed in the network
interface list in the **Networking > Network Interface** view. The following
operations can be performed by selecting a network interface from the list,
and clicking the appropriate icon.

**From top toolbar:**

* **Modify** - to change the name of the network interface.
* **Security Group** - to change the security group associated with the
  network interface.
* **Delete**
* **Detach Subnet** - to detach a specific network interface from a VM instance.
* **Soft Reset** - rebind all VM ports.
* **Hard Reset** - unbind and then rebind all relevant ports.

**From lower toolbar:**

* **Overview** - to see general information related to VM instance associated
  with the network interface, select **Overview** tab.
* **Events** - to view configuration events (info) or alarms for the
  network interface, select the **Events** tab in lower portion of view.