diff --git a/netbox_agent/ethtool.py b/netbox_agent/ethtool.py
index 46b55ad..ae78fda 100644
--- a/netbox_agent/ethtool.py
+++ b/netbox_agent/ethtool.py
@@ -1,7 +1,8 @@
 #  Originally from https://github.com/opencoff/useful-scripts/blob/master/linktest.py
 
 # mapping fields from ethtool output to simple names
-field_map = { 'Supported ports': 'ports',
+field_map = {
+    'Supported ports': 'ports',
     'Supported link modes': 'sup_link_modes',
     'Supports auto-negotiation': 'sup_autoneg',
     'Advertised link modes':  'adv_link_modes',
@@ -13,28 +14,29 @@ field_map = { 'Supported ports': 'ports',
     'Link detected': 'link',
 }
 
+
 def parse_ethtool_output(data):
-    """parse ethtool output"""
+    """
+    parse ethtool output
+    """
 
     fields = {}
-    field  = ""
-    fields['speed']  = "-"
-    fields['link']   = "-"
+    field = ''
+    fields['speed'] = '-'
+    fields['link'] = '-'
     fields['duplex'] = '-'
     for line in data.split('\n')[1:]:
         line = line.rstrip()
-        r    = line.find(':')
-        #verbose("       line=|%s|", line)
+        r = line.find(':')
         if r > 0:
             field = line[:r].strip()
             if field not in field_map:
                 continue
             field = field_map[field]
-            data  = line[r+1:].strip()
+            data = line[r+1:].strip()
             fields[field] = data
-            #verbose("  %s=%s", field, data)
         else:
             if len(field) > 0 and \
                field in field_map.keys():
-                fields[field] +=  ' ' + line.strip()
+                fields[field] += ' ' + line.strip()
     return fields
diff --git a/netbox_agent/network.py b/netbox_agent/network.py
index e26888e..c9ffd14 100644
--- a/netbox_agent/network.py
+++ b/netbox_agent/network.py
@@ -1,21 +1,31 @@
 import os
 import re
-import socket
 import subprocess
 
+from netaddr import IPAddress
 import netifaces
 
-from netbox_agent.ethtool import parse_ethtool_output
 from netbox_agent.config import netbox_instance as nb
+from netbox_agent.ethtool import parse_ethtool_output
 
 # Regex to match base interface name
 # Doesn't match vlan interfaces and other loopback etc
 INTERFACE_REGEX = re.compile('^(eth[0-9]+|ens[0-9]+|enp[0-9]+s[0-9]f[0-9])$')
 
+# FIXME: finish mapping tabble
+ETHTOOL_TO_NETBOX_TYPE = {
+    1200: 'SFP+ (10GE)',
+    1150: '10g baseT',
+    1000: '1G cuivre',
+    1400: '40G',
+    }
+
+
 class Network():
-    def __init__(self, *args, **kwargs):
+    def __init__(self, server, *args, **kwargs):
         self.nics = []
 
+        self.server = server
         self.scan()
 
     def _ethtool_for_interface(self, interface):
@@ -30,7 +40,10 @@ class Network():
                     'name': interface,
                     'mac': open('/sys/class/net/{}/address'.format(interface), 'r').read().strip(),
                     'ip': [
-                        x['addr'] for x in ip_addr
+                        '{}/{}'.format(
+                            x['addr'],
+                            IPAddress(x['netmask']).netmask_bits()
+                        ) for x in ip_addr
                         ] if ip_addr else None,  # FIXME: handle IPv6 addresses
                     'ethtool': self._ethtool_for_interface(interface)
                 }
@@ -39,13 +52,40 @@ class Network():
     def get_network_cards(self):
         return self.nics
 
-    def get_netbox_network_cards(self):
-        pass
-
     def update_netbox_network_cards(self):
-        # if network doesn't exist we create it
-        if True:
-            pass
-        # or we check if it needs update
-        else:
-            pass
+        device = self.server.get_netbox_server()
+        for nic in self.nics:
+            interface = nb.dcim.interfaces.get(
+                device=device,
+                mac_address=nic['mac'],
+                )
+            # if network doesn't exist we create it
+            if not interface:
+                new_interface = nb.dcim.interfaces.create(
+                    device=device.id,
+                    name=nic['name'],
+                    mac_address=nic['mac'],
+                    )
+                if nic['ip']:
+                    # for each ip, we try to find it
+                    # assign the device's interface to it
+                    # or simply create it
+                    for ip in nic['ip']:
+                        netbox_ip = nb.ipam.ip_addresses.get(
+                            address=ip,
+                        )
+                        if netbox_ip:
+                            netbox_ip.interface = new_interface
+                            netbox_ip.save()
+                        else:
+                            netbox_ip = nb.ipam.ip_addresses.create(
+                                address=ip,
+                                interface=new_interface.id,
+                                status=1,
+                            )
+            # or we check if it needs update
+            else:
+                # FIXME: implement update
+                # update name or ip
+                # see https://github.com/Solvik/netbox_agent/issues/9
+                pass
diff --git a/netbox_agent/server.py b/netbox_agent/server.py
index bce9e62..fb67bb8 100644
--- a/netbox_agent/server.py
+++ b/netbox_agent/server.py
@@ -1,9 +1,11 @@
 from pprint import pprint
+import socket
 
 from netbox_agent.config import netbox_instance as nb
 import netbox_agent.dmidecode as dmidecode
 from netbox_agent.network import Network
 
+
 class ServerBase():
     def __init__(self, dmi=None):
         if dmi:
@@ -13,7 +15,7 @@ class ServerBase():
         self.system = self.dmi.get_by_type('System')
         self.bios = self.dmi.get_by_type('BIOS')
 
-        self.network = Network(service_tag=self.get_service_tag())
+        self.network = Network(server=self)
 
     def get_product_name(self):
         """
@@ -110,6 +112,9 @@ class ServerBase():
         )
         return new_server
 
+    def get_netbox_server(self):
+        return nb.dcim.devices.get(serial=self.get_service_tag())
+
     def netbox_create(self):
         if self.is_blade():
             # let's find the blade
@@ -139,6 +144,8 @@ class ServerBase():
             if not server:
                 self._netbox_create_server()
 
+        self.network.update_netbox_network_cards()
+
     def print_debug(self):
         # FIXME: do something more generic by looping on every get_* methods
         print('Datacenter:', self.get_datacenter())
diff --git a/requirements.txt b/requirements.txt
index 0e602b2..6b76e04 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,3 @@
 pynetbox >= 4.0
+netaddr >= 0.7
+netifaces >= 0.10