diff --git a/planetstack/core/models/network.py b/planetstack/core/models/network.py
new file mode 100644
index 0000000..660107f
--- /dev/null
+++ b/planetstack/core/models/network.py
@@ -0,0 +1,84 @@
+import os
+import socket
+from django.db import models
+from core.models import PlCoreBase, Site, Slice, Sliver
+from django.contrib.contenttypes.models import ContentType
+from django.contrib.contenttypes import generic
+
+# If true, then IP addresses will be allocated by the model. If false, then
+# we will assume the observer handles it.
+#NO_OBSERVER=True
+
+class NetworkTemplate(PlCoreBase):
+    VISIBILITY_CHOICES = (('public', 'public'), ('private', 'private'))
+
+    name = models.CharField(max_length=32)
+    description = models.CharField(max_length=1024, blank=True, null=True)
+    guaranteedBandwidth = models.IntegerField(default=0)
+    visibility = models.CharField(max_length=30, choices=VISIBILITY_CHOICES, default="private")
+
+    def __unicode__(self):  return u'%s' % (self.name)
+
+class Network(PlCoreBase):
+    name = models.CharField(max_length=32)
+    template = models.ForeignKey(NetworkTemplate)
+    subnet = models.CharField(max_length=32, blank=True)
+    ports = models.CharField(max_length=1024, blank=True, null=True)
+    labels = models.CharField(max_length=1024, blank=True, null=True)
+    owner = models.ForeignKey(Slice, related_name="ownedNetworks")
+
+    guaranteedBandwidth = models.IntegerField(default=0)
+    permitAllSlices = models.BooleanField(default=False)
+    permittedSlices = models.ManyToManyField(Slice, blank=True, related_name="availableNetworks")
+    slices = models.ManyToManyField(Slice, blank=True, related_name="networks")
+    slivers = models.ManyToManyField(Sliver, blank=True, related_name="networks", through="NetworkSliver")
+
+    def __unicode__(self):  return u'%s' % (self.name)
+
+    def save(self, *args, **kwds):
+        if (not self.subnet) and (NO_OBSERVER):
+            from util.network_subnet_allocator import find_unused_subnet
+            self.subnet = find_unused_subnet(existing_subnets=[x.subnet for x in Network.objects.all()])
+        super(Network, self).save(*args, **kwds)
+
+class NetworkSliver(PlCoreBase):
+    network = models.ForeignKey(Network)
+    sliver = models.ForeignKey(Sliver)
+    ip = models.GenericIPAddressField(help_text="Sliver ip address", blank=True)
+
+    def save(self, *args, **kwds):
+        if (not self.ip) and (NO_OBSERVER):
+            from util.network_subnet_allocator import find_unused_address
+            self.ip = find_unused_address(self.network.subnet,
+                                          [x.ip for x in self.network.networksliver_set.all()])
+        super(NetworkSliver, self).save(*args, **kwds)
+
+    def __unicode__(self):  return u'%s-%s' % (self.network.name, self.sliver.instance_name)
+
+class Router(PlCoreBase):
+    name = models.CharField(max_length=32)
+    owner = models.ForeignKey(Slice, related_name="routers")
+    permittedNetworks = models.ManyToManyField(Network, blank=True, related_name="availableRouters")
+    networks = models.ManyToManyField(Network, blank=True, related_name="routers")
+
+    def __unicode__(self):  return u'%s' % (self.name)
+
+class NetworkParameterType(PlCoreBase):
+    name = models.SlugField(help_text="The name of this parameter", max_length=128)
+    description = models.CharField(max_length=1024)
+
+    def __unicode__(self):  return u'%s' % (self.name)
+
+class NetworkParameter(PlCoreBase):
+    parameter = models.ForeignKey(NetworkParameterType, related_name="parameters", help_text="The type of the parameter")
+    value = models.CharField(help_text="The value of this parameter", max_length=1024)
+
+    # The required fields to do a ObjectType lookup, and object_id assignment
+    content_type = models.ForeignKey(ContentType)
+    object_id = models.PositiveIntegerField()
+    content_object = generic.GenericForeignKey('content_type', 'object_id')
+
+    def __unicode__(self):
+        return self.parameter.name
+
+