diff --git a/src/inactive_w5500.rs b/src/inactive_w5500.rs
index 3bc7f7f..3aa68ad 100644
--- a/src/inactive_w5500.rs
+++ b/src/inactive_w5500.rs
@@ -1,26 +1,28 @@
 use bus::{ActiveFourWire, ActiveThreeWire, Bus, FourWire, ThreeWire};
+use network::Network;
 use embedded_hal::digital::v2::OutputPin;
 use embedded_hal::spi::FullDuplex;
 use w5500::W5500;
 
-pub struct InactiveW5500<SpiBus: Bus> {
+pub struct InactiveW5500<SpiBus: Bus, NetworkImpl: Network> {
     bus: SpiBus,
+    network: NetworkImpl
 }
 
-impl<SpiBus: Bus> InactiveW5500<SpiBus> {
-    pub fn new(bus: SpiBus) -> Self {
-        Self { bus }
+impl<SpiBus: Bus, NetworkImpl: Network> InactiveW5500<SpiBus, NetworkImpl> {
+    pub fn new(bus: SpiBus, network: NetworkImpl) -> Self {
+        Self { bus, network }
     }
 }
 
-impl<ChipSelect: OutputPin> InactiveW5500<FourWire<ChipSelect>> {
-    pub fn activate<Spi: FullDuplex<u8>>(self, spi: Spi) -> W5500<ActiveFourWire<Spi, ChipSelect>> {
-        W5500::new(self.bus.activate(spi))
+impl<ChipSelect: OutputPin, NetworkImpl: Network> InactiveW5500<FourWire<ChipSelect>, NetworkImpl> {
+    pub fn activate<Spi: FullDuplex<u8>>(self, spi: Spi) -> W5500<ActiveFourWire<Spi, ChipSelect>, NetworkImpl> {
+        W5500::new(self.bus.activate(spi), self.network)
     }
 }
 
-impl InactiveW5500<ThreeWire> {
-    pub fn activate<Spi: FullDuplex<u8>>(self, spi: Spi) -> W5500<ActiveThreeWire<Spi>> {
-        W5500::new(self.bus.activate(spi))
+impl<NetworkImpl: Network> InactiveW5500<ThreeWire, NetworkImpl> {
+    pub fn activate<Spi: FullDuplex<u8>>(self, spi: Spi) -> W5500<ActiveThreeWire<Spi>, NetworkImpl> {
+        W5500::new(self.bus.activate(spi), self.network)
     }
 }
diff --git a/src/lib.rs b/src/lib.rs
index 5c94d26..5689b1e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -945,3 +945,4 @@ pub mod inactive_w5500;
 pub mod uninitialized_w5500;
 pub mod w5500;
 mod register;
+mod network;
diff --git a/src/network/dhcp.rs b/src/network/dhcp.rs
new file mode 100644
index 0000000..e1dddea
--- /dev/null
+++ b/src/network/dhcp.rs
@@ -0,0 +1,29 @@
+use crate::bus::ActiveBus;
+use crate::network::{Network,NetworkSettings};
+use crate::MacAddress;
+
+pub struct Dhcp {
+    settings: NetworkSettings,
+    current: NetworkSettings,
+}
+
+impl Dhcp {
+    pub fn new(mac: MacAddress) -> Self {
+        let settings = NetworkSettings {
+            mac,
+            ..NetworkSettings::default()
+        };
+        Self {
+            settings,
+            current: NetworkSettings::default(),
+        }
+    }
+}
+
+impl Network for Dhcp {
+    /// Gets (if necessary) and sets the network settings on the chip
+    fn refresh<SpiBus: ActiveBus>(&mut self, _bus: &mut SpiBus) -> Result<(), SpiBus::Error> {
+        // TODO actually negotiate settings from DHCP
+        Ok(())
+    }
+}
diff --git a/src/network/manual.rs b/src/network/manual.rs
new file mode 100644
index 0000000..979fb79
--- /dev/null
+++ b/src/network/manual.rs
@@ -0,0 +1,36 @@
+use crate::network::NetworkSettings;
+use crate::network::Network;
+use crate::bus::ActiveBus;
+use crate::{MacAddress, IpAddress};
+
+pub struct Manual {
+    is_setup: bool,
+    settings: NetworkSettings,
+    current: NetworkSettings,
+}
+
+impl Manual {
+    pub fn new(mac: MacAddress, ip: IpAddress, gateway: IpAddress, subnet: IpAddress) -> Self {
+        Self {
+            is_setup: false,
+            settings: NetworkSettings {
+                mac,
+                ip,
+                gateway,
+                subnet,
+            },
+            current: NetworkSettings::default()
+        }
+    }
+}
+
+impl Network for Manual {
+    /// Gets (if necessary) and sets the network settings on the chip
+    fn refresh<SpiBus: ActiveBus>(&mut self, bus: &mut SpiBus) -> Result<(), SpiBus::Error> {
+        if !self.is_setup {
+            Self::write_settings(bus, &mut self.current, &self.settings)?;
+            self.is_setup = true;
+        }
+        Ok(())
+    }
+}
diff --git a/src/network/mod.rs b/src/network/mod.rs
new file mode 100644
index 0000000..4f698f4
--- /dev/null
+++ b/src/network/mod.rs
@@ -0,0 +1,49 @@
+mod dhcp;
+mod manual;
+
+use crate::{MacAddress,IpAddress};
+use crate::bus::ActiveBus;
+use crate::register;
+pub use self::dhcp::Dhcp;
+pub use self::manual::Manual;
+
+#[derive(Default)]
+pub struct NetworkSettings {
+    mac: MacAddress,
+    ip: IpAddress,
+    gateway: IpAddress,
+    subnet: IpAddress,
+}
+
+pub trait Network {
+    /// Gets (if necessary) and sets the network settings on the chip
+    fn refresh<SpiBus: ActiveBus>(&mut self, bus: &mut SpiBus) -> Result<(), SpiBus:: Error>;
+
+    /// Write changed settings to chip
+    ///
+    /// Will check all settings and write any new ones to the chip.  Will update the settings returned by `current`
+    /// with any changes.
+    fn write_settings<SpiBus: ActiveBus>(bus: &mut SpiBus, current: &mut NetworkSettings, settings: &NetworkSettings) -> Result<(), SpiBus::Error> {
+        if settings.gateway != current.gateway {
+            let mut address = settings.gateway.address;
+            block!(bus.transfer_frame(register::COMMON, register::common::GATEWAY, true, &mut address))?;
+            current.gateway = settings.gateway;
+        }
+        if settings.subnet != current.subnet {
+            let mut address = settings.subnet.address;
+            block!(bus.transfer_frame(register::COMMON, register::common::SUBNET_MASK, true, &mut address))?;
+            current.subnet = settings.subnet;
+        }
+        if settings.mac != current.mac {
+            let mut address = settings.mac.address;
+            block!(bus.transfer_frame(register::COMMON, register::common::MAC, true, &mut address))?;
+            current.mac = settings.mac;
+        }
+        if settings.ip != current.ip {
+            let mut address = settings.ip.address;
+            block!(bus.transfer_frame(register::COMMON, register::common::IP, true, &mut address))?;
+            current.ip = settings.ip;
+        }
+        Ok(())
+    }
+}
diff --git a/src/register.rs b/src/register.rs
index 043056a..1c5147a 100644
--- a/src/register.rs
+++ b/src/register.rs
@@ -2,5 +2,10 @@
 pub const COMMON: u8 = 0;
 
 pub mod common {
-	pub const MODE: u16 = 0;
+	pub const MODE: u16 = 0x0;
+	pub const GATEWAY: u16 = 0x1;
+	pub const SUBNET_MASK: u16 = 0x5;
+	pub const MAC: u16 = 0x9;
+	pub const IP: u16 = 0xF;
+	pub const VERSION: u16 = 0x39;
 }
diff --git a/src/w5500.rs b/src/w5500.rs
index d159927..8cf7864 100644
--- a/src/w5500.rs
+++ b/src/w5500.rs
@@ -1,17 +1,19 @@
 use crate::inactive_w5500::InactiveW5500;
 use crate::uninitialized_w5500::UninitializedW5500;
 use bus::{ActiveBus, ActiveFourWire, ActiveThreeWire, FourWire, ThreeWire};
+use network::Network;
 use embedded_hal::digital::v2::OutputPin;
 use embedded_hal::spi::FullDuplex;
 use register;
 
-pub struct W5500<SpiBus: ActiveBus> {
+pub struct W5500<SpiBus: ActiveBus, NetworkImpl: Network> {
     bus: SpiBus,
+    network: NetworkImpl,
 }
 
-impl<SpiBus: ActiveBus> W5500<SpiBus> {
-    pub fn new(bus: SpiBus) -> Self {
-        W5500 { bus }
+impl<SpiBus: ActiveBus, NetworkImpl: Network> W5500<SpiBus, NetworkImpl> {
+    pub fn new(bus: SpiBus, network: NetworkImpl) -> Self {
+        W5500 { bus, network }
     }
     pub fn reset(mut self) -> Result<UninitializedW5500<SpiBus>, SpiBus::Error> {
         // TODO accept all sockets back
@@ -29,16 +31,16 @@ impl<SpiBus: ActiveBus> W5500<SpiBus> {
     //TODO open_udp_socket
 }
 
-impl<Spi: FullDuplex<u8>, ChipSelect: OutputPin> W5500<ActiveFourWire<Spi, ChipSelect>> {
-    pub fn deactivate(self) -> (InactiveW5500<FourWire<ChipSelect>>, Spi) {
+impl<Spi: FullDuplex<u8>, ChipSelect: OutputPin, NetworkImpl: Network> W5500<ActiveFourWire<Spi, ChipSelect>, NetworkImpl> {
+    pub fn deactivate(self) -> (InactiveW5500<FourWire<ChipSelect>, NetworkImpl>, Spi) {
         let (bus, spi) = self.bus.deactivate();
-        (InactiveW5500::new(bus), spi)
+        (InactiveW5500::new(bus, self.network), spi)
     }
 }
 
-impl<Spi: FullDuplex<u8>> W5500<ActiveThreeWire<Spi>> {
-    pub fn deactivate(self) -> (InactiveW5500<ThreeWire>, Spi) {
+impl<Spi: FullDuplex<u8>, NetworkImpl: Network> W5500<ActiveThreeWire<Spi>, NetworkImpl> {
+    pub fn deactivate(self) -> (InactiveW5500<ThreeWire, NetworkImpl>, Spi) {
         let (bus, spi) = self.bus.deactivate();
-        (InactiveW5500::new(bus), spi)
+        (InactiveW5500::new(bus, self.network), spi)
     }
 }