diff --git a/src/PepperDash.Essentials.Core/DeviceTypeInterfaces/INetworkSwitchControl.cs b/src/PepperDash.Essentials.Core/DeviceTypeInterfaces/INetworkSwitchControl.cs
new file mode 100644
index 00000000..ba3215fe
--- /dev/null
+++ b/src/PepperDash.Essentials.Core/DeviceTypeInterfaces/INetworkSwitchControl.cs
@@ -0,0 +1,122 @@
+using System;
+
+namespace PepperDash.Essentials.Core.DeviceTypeInterfaces;
+
+/// <summary>
+/// Interface for network switches that support VLAN assignment on individual ports.
+/// </summary>
+public interface INetworkSwitchVlanManager
+{
+    /// <summary>
+    /// Returns the current access VLAN ID configured on the port.
+    /// Return -1 when the value is unavailable (e.g. the switch has not been polled yet
+    /// or the implementation does not support VLAN queries).
+    /// </summary>
+    /// <param name="port">Switch port identifier</param>
+    /// <returns>VLAN ID or -1 when unavailable</returns>
+    int GetPortCurrentVlan(string port);
+
+    /// <summary>
+    /// Changes the access VLAN of a single switch port.
+    /// The implementation is responsible for entering/exiting privileged/config mode.
+    /// </summary>
+    /// <param name="port">Switch port identifier (e.g. "1/0/3" for Netgear, "gi1/0/3" for Cisco)</param>
+    /// <param name="vlanId">Target VLAN ID (1-4093)</param>
+    void SetPortVlan(string port, uint vlanId);
+}
+
+/// <summary>
+/// Interface for network switches that support Power over Ethernet (PoE) control on individual ports.
+/// </summary>
+public interface INetworkSwitchPoeManager
+{
+    /// <summary>
+    /// Enables or disables PoE power delivery on a single switch port.
+    /// The implementation is responsible for entering/exiting privileged/config mode.
+    /// </summary>
+    /// <param name="port">Switch port identifier</param>
+    /// <param name="enabled">True to enable PoE; false to disable PoE</param>
+    void SetPortPoeState(string port, bool enabled);
+}
+
+/// <summary>
+/// Standardized interface for network switch devices that support per-port PoE control
+/// and VLAN assignment.
+/// </summary>
+public interface INetworkSwitchPoeVlanManager : INetworkSwitchVlanManager, INetworkSwitchPoeManager
+{
+    /// <summary>
+    /// Event that is raised when the state of a switch port changes, such as a VLAN change or PoE state change.
+    /// </summary>
+    event EventHandler<NetworkSwitchPortEventArgs> PortStateChanged;
+
+}
+
+/// <summary>
+/// Event arguments for port state changes on a network switch, such as VLAN changes or PoE state changes.
+/// </summary>
+public class NetworkSwitchPortEventArgs : EventArgs
+{
+    /// <summary>
+    /// The identifier of the port that changed state (e.g. "1/0/3" for Netgear, "gi1/0/3" for Cisco).
+    /// </summary>
+    public string Port { get; private set; }
+
+    /// <summary>
+    /// The type of event that occurred on the port (e.g. VLAN change, PoE enabled/disabled).
+    /// </summary>
+    public NetworkSwitchPortEventType EventType { get; private set; }
+
+    /// <summary>
+    /// Constructor for NetworkSwitchPortEventArgs
+    /// </summary>
+    /// <param name="port">The identifier of the port that changed state</param>
+    /// <param name="eventType">The type of event that occurred on the port</param>
+    public NetworkSwitchPortEventArgs(string port, NetworkSwitchPortEventType eventType)
+    {
+        Port = port;
+        EventType = eventType;
+    }
+}
+
+/// <summary>
+/// Event arguments for port state changes on a network switch, such as VLAN changes or PoE state changes.
+/// </summary>
+public enum NetworkSwitchPortEventType
+{
+    /// <summary>
+    /// Indicates that the type of event is unknown or cannot be determined.
+    /// </summary>
+    Unknown,
+
+    /// <summary>
+    /// Indicates that a VLAN change is in progress on the port, either through a call to SetPortVlan or an external change detected by polling.
+    /// </summary>
+    VlanChangeInProgress,
+
+    /// <summary>
+    /// Indicates that the access VLAN on a port has changed, either through a successful call to SetPortVlan
+    /// </summary>
+    VlanChanged,
+
+    /// <summary>
+    /// Indicates that PoE is being disabled on the port, either through a call to SetPortPoeState or an external change detected by polling.
+    /// </summary>
+    PoeDisableInProgress,
+
+    /// <summary>
+    /// Indicates that the PoE state on a port has changed, either through a successful call to SetPortPoeState
+    /// </summary>
+    PoEDisabled,
+
+    /// <summary> 
+    /// Indicates that PoE is being enabled on the port, either through a call to SetPortPoeState or an external change detected by polling. 
+    /// </summary>
+    PoeEnableInProgress,
+
+    /// <summary>
+    /// Indicates that the PoE state on a port has changed, either through a successful call to SetPortPoeState
+    /// </summary>
+    PoEEnabled
+}
+