diff --git a/lib/ansible/modules/network/f5/bigip_device_trust.py b/lib/ansible/modules/network/f5/bigip_device_trust.py
new file mode 100644
index 00000000000..4e7cdf7915f
--- /dev/null
+++ b/lib/ansible/modules/network/f5/bigip_device_trust.py
@@ -0,0 +1,324 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+#
+# Copyright (c) 2017 F5 Networks Inc.
+# GNU General Public License v3.0 (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
+
+ANSIBLE_METADATA = {'metadata_version': '1.1',
+                    'status': ['preview'],
+                    'supported_by': 'community'}
+
+DOCUMENTATION = r'''
+---
+module: bigip_device_trust
+short_description: Manage the trust relationships between BIG-IPs
+description:
+  - Manage the trust relationships between BIG-IPs. Devices, once peered, cannot
+    be updated. If updating is needed, the peer must first be removed before it
+    can be re-added to the trust.
+version_added: "2.5"
+options:
+  peer_server:
+    description:
+      - The peer address to connect to and trust for synchronizing configuration.
+        This is typically the management address of the remote device, but may
+        also be a Self IP.
+    required: True
+  peer_hostname:
+    description:
+      - The hostname that you want to associate with the device. This value will
+        be used to easily distinguish this device in BIG-IP configuration. If not
+        specified, the value of C(peer_server) will be used as a default.
+  peer_user:
+    description:
+      - The API username of the remote peer device that you are trusting. Note
+        that the CLI user cannot be used unless it too has an API account. If this
+        value is not specified, then the value of C(user), or the environment
+        variable C(F5_USER) will be used.
+  peer_password:
+    description:
+      - The password of the API username of the remote peer device that you are
+        trusting. If this value is not specified, then the value of C(password),
+        or the environment variable C(F5_PASSWORD) will be used.
+  type:
+    description:
+      - Specifies whether the device you are adding is a Peer or a Subordinate.
+        The default is C(peer).
+      - The difference between the two is a matter of mitigating risk of
+        compromise.
+      - A subordinate device cannot sign a certificate for another device.
+      - In the case where the security of an authority device in a trust domain
+        is compromised, the risk of compromise is minimized for any subordinate
+        device.
+      - Designating devices as subordinate devices is recommended for device
+        groups with a large number of member devices, where the risk of compromise
+        is high.
+    choices:
+      - peer
+      - subordinate
+    default: peer
+notes:
+    - Requires the f5-sdk Python package on the host. This is as easy as
+      pip install f5-sdk.
+requirements:
+  - f5-sdk
+  - netaddr
+extends_documentation_fragment: f5
+author:
+  - Tim Rupp (@caphrim007)
+'''
+
+EXAMPLES = r'''
+- name: Add trusts for all peer devices to Active device
+  bigip_device_trust:
+    server: lb.mydomain.com
+    user: admin
+    password: secret
+    peer_server: "{{ item.ansible_host }}"
+    peer_hostname: "{{ item.inventory_hostname }}"
+    peer_user: "{{ item.bigip_username }}"
+    peer_password: "{{ item.bigip_password }}"
+  with_items: hostvars
+  when: inventory_hostname in groups['master']
+  delegate_to: localhost
+'''
+
+RETURN = r'''
+peer_server:
+  description: The remote IP address of the trusted peer.
+  returned: changed
+  type: string
+  sample: 10.0.2.15
+peer_hostname:
+  description: The remote hostname used to identify the trusted peer.
+  returned: changed
+  type: string
+  sample: test-bigip-02.localhost.localdomain
+'''
+
+import re
+
+try:
+    import netaddr
+    HAS_NETADDR = True
+except ImportError:
+    HAS_NETADDR = False
+
+from ansible.module_utils.f5_utils import AnsibleF5Client
+from ansible.module_utils.f5_utils import AnsibleF5Parameters
+from ansible.module_utils.f5_utils import HAS_F5SDK
+from ansible.module_utils.f5_utils import F5ModuleError
+
+try:
+    from ansible.module_utils.f5_utils import iControlUnexpectedHTTPError
+except ImportError:
+    HAS_F5SDK = False
+
+
+class Parameters(AnsibleF5Parameters):
+    api_map = {
+        'deviceName': 'peer_hostname',
+        'caDevice': 'type',
+        'device': 'peer_server',
+        'username': 'peer_user',
+        'password': 'peer_password'
+    }
+
+    api_attributes = [
+        'name', 'caDevice', 'device', 'deviceName', 'username', 'password'
+    ]
+
+    returnables = [
+        'peer_server', 'peer_hostname'
+    ]
+
+    updatables = []
+
+    def to_return(self):
+        result = {}
+        try:
+            for returnable in self.returnables:
+                result[returnable] = getattr(self, returnable)
+            result = self._filter_params(result)
+            return result
+        except Exception:
+            return result
+
+    def api_params(self):
+        result = {}
+        for api_attribute in self.api_attributes:
+            if self.api_map is not None and api_attribute in self.api_map:
+                result[api_attribute] = getattr(self, self.api_map[api_attribute])
+            else:
+                result[api_attribute] = getattr(self, api_attribute)
+        result = self._filter_params(result)
+        return result
+
+    @property
+    def peer_server(self):
+        if self._values['peer_server'] is None:
+            return None
+        try:
+            result = str(netaddr.IPAddress(self._values['peer_server']))
+            return result
+        except netaddr.core.AddrFormatError:
+            raise F5ModuleError(
+                "The provided 'peer_server' parameter is not an IP address."
+            )
+
+    @property
+    def peer_hostname(self):
+        if self._values['peer_hostname'] is None:
+            return self.peer_server
+        regex = re.compile('[^a-zA-Z.-_]')
+        result = regex.sub('_', self._values['peer_hostname'])
+        return result
+
+    @property
+    def partition(self):
+        # Partitions are not supported when making peers.
+        # Everybody goes in Common.
+        return None
+
+    @property
+    def type(self):
+        if self._values['type'] == 'peer':
+            return True
+        return False
+
+
+class ModuleManager(object):
+    def __init__(self, client):
+        self.client = client
+        self.have = None
+        self.want = Parameters(self.client.module.params)
+        self.changes = Parameters()
+
+    def _set_changed_options(self):
+        changed = {}
+        for key in Parameters.returnables:
+            if getattr(self.want, key) is not None:
+                changed[key] = getattr(self.want, key)
+        if changed:
+            self.changes = Parameters(changed)
+
+    def exec_module(self):
+        changed = False
+        result = dict()
+        state = self.want.state
+
+        try:
+            if state == "present":
+                changed = self.present()
+            elif state == "absent":
+                changed = self.absent()
+        except iControlUnexpectedHTTPError as e:
+            raise F5ModuleError(str(e))
+
+        changes = self.changes.to_return()
+        result.update(**changes)
+        result.update(dict(changed=changed))
+        return result
+
+    def present(self):
+        if self.exists():
+            return False
+        else:
+            return self.create()
+
+    def create(self):
+        self._set_changed_options()
+        if self.want.peer_user is None:
+            self.want.update({'peer_user': self.want.user})
+        if self.want.peer_password is None:
+            self.want.update({'peer_password': self.want.password})
+        if self.want.peer_hostname is None:
+            self.want.update({'peer_hostname': self.want.server})
+        if self.client.check_mode:
+            return True
+        self.create_on_device()
+        return True
+
+    def absent(self):
+        if self.exists():
+            return self.remove()
+        return False
+
+    def remove(self):
+        if self.client.check_mode:
+            return True
+        self.remove_from_device()
+        if self.exists():
+            raise F5ModuleError("Failed to remove the trusted peer.")
+        return True
+
+    def exists(self):
+        result = self.client.api.tm.cm.devices.get_collection()
+        for device in result:
+            try:
+                if device.managementIp == self.want.peer_server:
+                    return True
+            except AttributeError:
+                pass
+        return False
+
+    def create_on_device(self):
+        params = self.want.api_params()
+        self.client.api.tm.cm.add_to_trust.exec_cmd(
+            'run',
+            name='Root',
+            **params
+        )
+
+    def remove_from_device(self):
+        result = self.client.api.tm.cm.remove_from_trust.exec_cmd(
+            'run', deviceName=self.want.peer_hostname
+        )
+        if result:
+            result.delete()
+
+
+class ArgumentSpec(object):
+    def __init__(self):
+        self.supports_check_mode = True
+        self.argument_spec = dict(
+            peer_server=dict(required=True),
+            peer_hostname=dict(),
+            peer_user=dict(),
+            peer_password=dict(no_log=True),
+            type=dict(
+                choices=['peer', 'subordinate'],
+                default='peer'
+            )
+        )
+        self.f5_product_name = 'bigip'
+
+
+def main():
+    try:
+        spec = ArgumentSpec()
+
+        client = AnsibleF5Client(
+            argument_spec=spec.argument_spec,
+            supports_check_mode=spec.supports_check_mode,
+            f5_product_name=spec.f5_product_name
+        )
+
+        if not HAS_F5SDK:
+            raise F5ModuleError("The python f5-sdk module is required")
+
+        if not HAS_NETADDR:
+            raise F5ModuleError("The python netaddr module is required")
+
+        mm = ModuleManager(client)
+        results = mm.exec_module()
+        client.module.exit_json(**results)
+    except F5ModuleError as e:
+        client.module.fail_json(msg=str(e))
+
+
+if __name__ == '__main__':
+    main()
diff --git a/test/units/modules/network/f5/test_bigip_device_trust.py b/test/units/modules/network/f5/test_bigip_device_trust.py
new file mode 100644
index 00000000000..10d1139e1e1
--- /dev/null
+++ b/test/units/modules/network/f5/test_bigip_device_trust.py
@@ -0,0 +1,176 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (c) 2017 F5 Networks Inc.
+# GNU General Public License v3.0 (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import os
+import json
+import sys
+
+from nose.plugins.skip import SkipTest
+if sys.version_info < (2, 7):
+    raise SkipTest("F5 Ansible modules require Python >= 2.7")
+
+from ansible.compat.tests import unittest
+from ansible.compat.tests.mock import patch, Mock
+from ansible.module_utils import basic
+from ansible.module_utils._text import to_bytes
+from ansible.module_utils.f5_utils import AnsibleF5Client
+
+try:
+    from library.bigip_device_trust import Parameters
+    from library.bigip_device_trust import ModuleManager
+    from library.bigip_device_trust import ArgumentSpec
+    from library.bigip_device_trust import HAS_F5SDK
+    from library.bigip_device_trust import HAS_NETADDR
+    from ansible.module_utils.f5_utils import iControlUnexpectedHTTPError
+except ImportError:
+    try:
+        from ansible.modules.network.f5.bigip_device_trust import Parameters
+        from ansible.modules.network.f5.bigip_device_trust import ModuleManager
+        from ansible.modules.network.f5.bigip_device_trust import ArgumentSpec
+        from ansible.modules.network.f5.bigip_device_trust import HAS_F5SDK
+        from ansible.modules.network.f5.bigip_device_trust import HAS_NETADDR
+        from ansible.module_utils.f5_utils import iControlUnexpectedHTTPError
+    except ImportError:
+        raise SkipTest("F5 Ansible modules require the f5-sdk Python library")
+
+    from ansible.modules.network.f5.bigip_device_trust import HAS_NETADDR
+    if not HAS_NETADDR:
+        raise SkipTest("F5 Ansible modules require the netaddr Python library")
+
+fixture_path = os.path.join(os.path.dirname(__file__), 'fixtures')
+fixture_data = {}
+
+
+def set_module_args(args):
+    args = json.dumps({'ANSIBLE_MODULE_ARGS': args})
+    basic._ANSIBLE_ARGS = to_bytes(args)
+
+
+def load_fixture(name):
+    path = os.path.join(fixture_path, name)
+
+    if path in fixture_data:
+        return fixture_data[path]
+
+    with open(path) as f:
+        data = f.read()
+
+    try:
+        data = json.loads(data)
+    except Exception:
+        pass
+
+    fixture_data[path] = data
+    return data
+
+
+class TestParameters(unittest.TestCase):
+    def test_module_parameters(self):
+        args = dict(
+            peer_server='10.10.10.10',
+            peer_hostname='foo.bar.baz',
+            peer_user='admin',
+            peer_password='secret'
+        )
+
+        p = Parameters(args)
+        assert p.peer_server == '10.10.10.10'
+        assert p.peer_hostname == 'foo.bar.baz'
+        assert p.peer_user == 'admin'
+        assert p.peer_password == 'secret'
+
+    def test_module_parameters_with_peer_type(self):
+        args = dict(
+            peer_server='10.10.10.10',
+            peer_hostname='foo.bar.baz',
+            peer_user='admin',
+            peer_password='secret',
+            type='peer'
+        )
+
+        p = Parameters(args)
+        assert p.peer_server == '10.10.10.10'
+        assert p.peer_hostname == 'foo.bar.baz'
+        assert p.peer_user == 'admin'
+        assert p.peer_password == 'secret'
+        assert p.type is True
+
+    def test_module_parameters_with_subordinate_type(self):
+        args = dict(
+            peer_server='10.10.10.10',
+            peer_hostname='foo.bar.baz',
+            peer_user='admin',
+            peer_password='secret',
+            type='subordinate'
+        )
+
+        p = Parameters(args)
+        assert p.peer_server == '10.10.10.10'
+        assert p.peer_hostname == 'foo.bar.baz'
+        assert p.peer_user == 'admin'
+        assert p.peer_password == 'secret'
+        assert p.type is False
+
+
+@patch('ansible.module_utils.f5_utils.AnsibleF5Client._get_mgmt_root',
+       return_value=True)
+class TestManager(unittest.TestCase):
+
+    def setUp(self):
+        self.spec = ArgumentSpec()
+
+    def test_create_device_trust(self, *args):
+        set_module_args(dict(
+            peer_server='10.10.10.10',
+            peer_hostname='foo.bar.baz',
+            peer_user='admin',
+            peer_password='secret',
+            server='localhost',
+            password='password',
+            user='admin'
+        ))
+
+        client = AnsibleF5Client(
+            argument_spec=self.spec.argument_spec,
+            supports_check_mode=self.spec.supports_check_mode,
+            f5_product_name=self.spec.f5_product_name
+        )
+
+        # Override methods in the specific type of manager
+        mm = ModuleManager(client)
+        mm.exists = Mock(side_effect=[False, True])
+        mm.create_on_device = Mock(return_value=True)
+
+        results = mm.exec_module()
+
+        assert results['changed'] is True
+
+    def test_create_device_trust_idempotent(self, *args):
+        set_module_args(dict(
+            peer_server='10.10.10.10',
+            peer_hostname='foo.bar.baz',
+            peer_user='admin',
+            peer_password='secret',
+            server='localhost',
+            password='password',
+            user='admin'
+        ))
+
+        client = AnsibleF5Client(
+            argument_spec=self.spec.argument_spec,
+            supports_check_mode=self.spec.supports_check_mode,
+            f5_product_name=self.spec.f5_product_name
+        )
+
+        # Override methods in the specific type of manager
+        mm = ModuleManager(client)
+        mm.exists = Mock(return_value=True)
+
+        results = mm.exec_module()
+
+        assert results['changed'] is False