diff --git a/network/nxos/nxos_overlay_global.py b/network/nxos/nxos_overlay_global.py
new file mode 100644
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--- /dev/null
+++ b/network/nxos/nxos_overlay_global.py
@@ -0,0 +1,409 @@
+#!/usr/bin/python
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+DOCUMENTATION = '''
+---
+module: nxos_overlay_global
+version_added: "2.2"
+short_description: Configures anycast gateway MAC of the switch.
+description:
+    - Configures anycast gateway MAC of the switch.
+author: Gabriele Gerbino (@GGabriele)
+extends_documentation_fragment: nxos
+notes:
+    - Default restores params default value
+    - Supported MAC address format are "E.E.E", "EE-EE-EE-EE-EE-EE",
+      "EE:EE:EE:EE:EE:EE" and "EEEE.EEEE.EEEE"
+options:
+    anycast_gateway_mac:
+        description:
+            - Anycast gateway mac of the switch.
+        required: true
+        default: null
+'''
+
+EXAMPLES = '''
+- nxos_overlay_global:
+    anycast_gateway_mac="b.b.b"
+    username: "{{ un }}"
+    password: "{{ pwd }}"
+    host: "{{ inventory_hostname }}"
+'''
+
+RETURN = '''
+proposed:
+    description: k/v pairs of parameters passed into module
+    returned: verbose mode
+    type: dict
+    sample: {"asn": "65535", "router_id": "1.1.1.1", "vrf": "test"}
+existing:
+    description: k/v pairs of existing BGP configuration
+    returned: verbose mode
+    type: dict
+    sample: {"asn": "65535", "bestpath_always_compare_med": false,
+            "bestpath_aspath_multipath_relax": false,
+            "bestpath_compare_neighborid": false,
+            "bestpath_compare_routerid": false,
+            "bestpath_cost_community_ignore": false,
+            "bestpath_med_confed": false,
+            "bestpath_med_missing_as_worst": false,
+            "bestpath_med_non_deterministic": false, "cluster_id": "",
+            "confederation_id": "", "confederation_peers": "",
+            "graceful_restart": true, "graceful_restart_helper": false,
+            "graceful_restart_timers_restart": "120",
+            "graceful_restart_timers_stalepath_time": "300", "local_as": "",
+            "log_neighbor_changes": false, "maxas_limit": "",
+            "neighbor_down_fib_accelerate": false, "reconnect_interval": "60",
+            "router_id": "11.11.11.11", "suppress_fib_pending": false,
+            "timer_bestpath_limit": "", "timer_bgp_hold": "180",
+            "timer_bgp_keepalive": "60", "vrf": "test"}
+end_state:
+    description: k/v pairs of BGP configuration after module execution
+    returned: verbose mode
+    type: dict
+    sample: {"asn": "65535", "bestpath_always_compare_med": false,
+            "bestpath_aspath_multipath_relax": false,
+            "bestpath_compare_neighborid": false,
+            "bestpath_compare_routerid": false,
+            "bestpath_cost_community_ignore": false,
+            "bestpath_med_confed": false,
+            "bestpath_med_missing_as_worst": false,
+            "bestpath_med_non_deterministic": false, "cluster_id": "",
+            "confederation_id": "", "confederation_peers": "",
+            "graceful_restart": true, "graceful_restart_helper": false,
+            "graceful_restart_timers_restart": "120",
+            "graceful_restart_timers_stalepath_time": "300", "local_as": "",
+            "log_neighbor_changes": false, "maxas_limit": "",
+            "neighbor_down_fib_accelerate": false, "reconnect_interval": "60",
+            "router_id": "1.1.1.1",  "suppress_fib_pending": false,
+            "timer_bestpath_limit": "", "timer_bgp_hold": "180",
+            "timer_bgp_keepalive": "60", "vrf": "test"}
+updates:
+    description: commands sent to the device
+    returned: always
+    type: list
+    sample: ["router bgp 65535", "vrf test", "router-id 1.1.1.1"]
+changed:
+    description: check to see if a change was made on the device
+    returned: always
+    type: boolean
+    sample: true
+'''
+
+# COMMON CODE FOR MIGRATION
+import re
+
+from ansible.module_utils.basic import get_exception
+from ansible.module_utils.netcfg import NetworkConfig, ConfigLine
+from ansible.module_utils.shell import ShellError
+
+try:
+    from ansible.module_utils.nxos import get_module
+except ImportError:
+    from ansible.module_utils.nxos import NetworkModule
+
+
+def to_list(val):
+     if isinstance(val, (list, tuple)):
+         return list(val)
+     elif val is not None:
+         return [val]
+     else:
+         return list()
+
+
+class CustomNetworkConfig(NetworkConfig):
+
+    def expand_section(self, configobj, S=None):
+        if S is None:
+            S = list()
+        S.append(configobj)
+        for child in configobj.children:
+            if child in S:
+                continue
+            self.expand_section(child, S)
+        return S
+
+    def get_object(self, path):
+        for item in self.items:
+            if item.text == path[-1]:
+                parents = [p.text for p in item.parents]
+                if parents == path[:-1]:
+                    return item
+
+    def to_block(self, section):
+        return '\n'.join([item.raw for item in section])
+
+    def get_section(self, path):
+        try:
+            section = self.get_section_objects(path)
+            return self.to_block(section)
+        except ValueError:
+            return list()
+
+    def get_section_objects(self, path):
+        if not isinstance(path, list):
+            path = [path]
+        obj = self.get_object(path)
+        if not obj:
+            raise ValueError('path does not exist in config')
+        return self.expand_section(obj)
+
+
+    def add(self, lines, parents=None):
+        """Adds one or lines of configuration
+        """
+
+        ancestors = list()
+        offset = 0
+        obj = None
+
+        ## global config command
+        if not parents:
+            for line in to_list(lines):
+                item = ConfigLine(line)
+                item.raw = line
+                if item not in self.items:
+                    self.items.append(item)
+
+        else:
+            for index, p in enumerate(parents):
+                try:
+                    i = index + 1
+                    obj = self.get_section_objects(parents[:i])[0]
+                    ancestors.append(obj)
+
+                except ValueError:
+                    # add parent to config
+                    offset = index * self.indent
+                    obj = ConfigLine(p)
+                    obj.raw = p.rjust(len(p) + offset)
+                    if ancestors:
+                        obj.parents = list(ancestors)
+                        ancestors[-1].children.append(obj)
+                    self.items.append(obj)
+                    ancestors.append(obj)
+
+            # add child objects
+            for line in to_list(lines):
+                # check if child already exists
+                for child in ancestors[-1].children:
+                    if child.text == line:
+                        break
+                else:
+                    offset = len(parents) * self.indent
+                    item = ConfigLine(line)
+                    item.raw = line.rjust(len(line) + offset)
+                    item.parents = ancestors
+                    ancestors[-1].children.append(item)
+                    self.items.append(item)
+
+
+def get_network_module(**kwargs):
+    try:
+        return get_module(**kwargs)
+    except NameError:
+        return NetworkModule(**kwargs)
+
+def get_config(module, include_defaults=False):
+    config = module.params['config']
+    if not config:
+        try:
+            config = module.get_config()
+        except AttributeError:
+            defaults = module.params['include_defaults']
+            config = module.config.get_config(include_defaults=defaults)
+    return CustomNetworkConfig(indent=2, contents=config)
+
+def load_config(module, candidate):
+    config = get_config(module)
+
+    commands = candidate.difference(config)
+    commands = [str(c).strip() for c in commands]
+
+    save_config = module.params['save']
+
+    result = dict(changed=False)
+
+    if commands:
+        if not module.check_mode:
+            try:
+                module.configure(commands)
+            except AttributeError:
+                module.config(commands)
+
+            if save_config:
+                try:
+                    module.config.save_config()
+                except AttributeError:
+                    module.execute(['copy running-config startup-config'])
+
+        result['changed'] = True
+        result['updates'] = commands
+
+    return result
+# END OF COMMON CODE
+
+PARAM_TO_COMMAND_KEYMAP = {
+    'anycast_gateway_mac': 'fabric forwarding anycast-gateway-mac',
+}
+
+
+def invoke(name, *args, **kwargs):
+    func = globals().get(name)
+    if func:
+        return func(*args, **kwargs)
+
+
+def get_value(arg, config, module):
+    REGEX = re.compile(r'(?:{0}\s)(?P<value>.*)$'.format(PARAM_TO_COMMAND_KEYMAP[arg]), re.M)
+    value = ''
+    if PARAM_TO_COMMAND_KEYMAP[arg] in config:
+        value = REGEX.search(config).group('value')
+    return value
+
+
+def get_existing(module, args):
+    existing = {}
+    config = str(get_config(module))
+
+    for arg in args:
+        existing[arg] = get_value(arg, config, module)
+    return existing
+
+
+def apply_key_map(key_map, table):
+    new_dict = {}
+    for key, value in table.items():
+        new_key = key_map.get(key)
+        if new_key:
+            value = table.get(key)
+            if value:
+                new_dict[new_key] = value
+            else:
+                new_dict[new_key] = value
+    return new_dict
+
+
+def get_commands(module, existing, proposed, candidate):
+    commands = list()
+    proposed_commands = apply_key_map(PARAM_TO_COMMAND_KEYMAP, proposed)
+    existing_commands = apply_key_map(PARAM_TO_COMMAND_KEYMAP, existing)
+
+    for key, value in proposed_commands.iteritems():
+        if value == 'default':
+            existing_value = existing_commands.get(key)
+            if existing_value:
+                commands.append('no {0} {1}'.format(key, existing_value))
+        else:
+            if 'anycast-gateway-mac' in key:
+                value = normalize_mac(value, module)
+            command = '{0} {1}'.format(key, value)
+            commands.append(command)
+
+    if commands:
+        candidate.add(commands, parents=[])
+
+
+def normalize_mac(proposed_mac, module):
+    try:
+        if '-' in proposed_mac:
+            splitted_mac = proposed_mac.split('-')
+            if len(splitted_mac) != 6:
+                raise ValueError
+
+            for octect in splitted_mac:
+                if len(octect) != 2:
+                    raise ValueError
+
+        elif '.' in proposed_mac:
+            splitted_mac = []
+            splitted_dot_mac = proposed_mac.split('.')
+            if len(splitted_dot_mac) != 3:
+                raise ValueError
+
+            for octect in splitted_dot_mac:
+                if len(octect) > 4:
+                    raise ValueError
+                else:
+                    octect_len = len(octect)
+                    padding = 4 - octect_len
+                    splitted_mac.append(octect.zfill(padding+1))
+
+        elif ':' in proposed_mac:
+            splitted_mac = proposed_mac.split(':')
+            if len(splitted_mac) != 6:
+                raise ValueError
+
+            for octect in splitted_mac:
+                if len(octect) != 2:
+                    raise ValueError
+        else:
+            raise ValueError
+    except ValueError:
+        module.fail_json(msg='Invalid MAC address format',
+                             proposed_mac=proposed_mac)
+
+    joined_mac = ''.join(splitted_mac)
+    mac = [joined_mac[i:i+4] for i in range(0, len(joined_mac), 4)]
+    return '.'.join(mac).upper()
+
+
+def main():
+    argument_spec = dict(
+            anycast_gateway_mac=dict(required=True, type='str'),
+            m_facts=dict(required=False, default=False, type='bool'),
+            include_defaults=dict(default=True),
+            config=dict(),
+            save=dict(type='bool', default=False)
+    )
+    module = get_network_module(argument_spec=argument_spec,
+                                supports_check_mode=True)
+
+    args =  [
+            'anycast_gateway_mac'
+        ]
+
+    existing = invoke('get_existing', module, args)
+    end_state = existing
+    proposed = dict((k, v) for k, v in module.params.iteritems()
+                    if v is not None and k in args)
+
+    result = {}
+    candidate = CustomNetworkConfig(indent=3)
+    invoke('get_commands', module, existing, proposed, candidate)
+
+    try:
+        response = load_config(module, candidate)
+        result.update(response)
+    except ShellError:
+        exc = get_exception()
+        module.fail_json(msg=str(exc))
+
+    result['connected'] = module.connected
+    if module._verbosity > 0:
+        end_state = invoke('get_existing', module, args)
+        result['end_state'] = end_state
+        result['existing'] = existing
+        result['proposed'] = proposed
+
+    module.exit_json(**result)
+
+
+if __name__ == '__main__':
+    main()