diff --git a/tobiko/openstack/stacks/__init__.py b/tobiko/openstack/stacks/__init__.py
index d1b7ae6c2..37b5e1f95 100644
--- a/tobiko/openstack/stacks/__init__.py
+++ b/tobiko/openstack/stacks/__init__.py
@@ -27,6 +27,7 @@ CirrosServerStackFixture = _cirros.CirrosServerStackFixture
 NetworkStackFixture = _neutron.NetworkStackFixture
 NetworkWithNetMtuWriteStackFixture = (
     _neutron.NetworkWithNetMtuWriteStackFixture)
+NetworkWithL3HAStackFixture = _neutron.NetworkWithL3HAStackFixture
 SecurityGroupsFixture = _neutron.SecurityGroupsFixture
 
 ServerStackFixture = _nova.ServerStackFixture
diff --git a/tobiko/openstack/stacks/_neutron.py b/tobiko/openstack/stacks/_neutron.py
index c2e353518..c935be9e2 100644
--- a/tobiko/openstack/stacks/_neutron.py
+++ b/tobiko/openstack/stacks/_neutron.py
@@ -63,7 +63,8 @@ class NetworkStackFixture(heat.HeatStackFixture):
             return None
 
     @property
-    def value_specs(self):
+    def network_value_specs(self):
+        """Extra network creation parameters"""
         return {}
 
     @property
@@ -71,6 +72,15 @@ class NetworkStackFixture(heat.HeatStackFixture):
         """Floating IP network where the Neutron floating IPs are created"""
         return CONF.tobiko.neutron.floating_network
 
+    ha = False
+
+    @property
+    def gateway_value_specs(self):
+        value_specs = {}
+        if self.has_l3_ha:
+            value_specs.update(ha=(self.ha or False))
+        return value_specs
+
     @property
     def has_gateway(self):
         """Whenever to setup gateway router"""
@@ -81,6 +91,11 @@ class NetworkStackFixture(heat.HeatStackFixture):
         """Whenever can obtain network MTU value"""
         return neutron.has_networking_extensions('net-mtu')
 
+    @property
+    def has_l3_ha(self):
+        """Whenever can obtain gateway router HA value"""
+        return neutron.has_networking_extensions('l3-ha')
+
     @property
     def network_details(self):
         return neutron.show_network(self.network_id)
@@ -136,12 +151,17 @@ class NetworkWithNetMtuWriteStackFixture(NetworkStackFixture):
         return CONF.tobiko.neutron.custom_mtu_size
 
     @property
-    def value_specs(self):
-        value_specs = super(
-            NetworkWithNetMtuWriteStackFixture, self).value_specs
+    def network_value_specs(self):
+        value_specs = super(NetworkWithNetMtuWriteStackFixture,
+                            self).network_value_specs
         return dict(value_specs, mtu=self.custom_mtu_size)
 
 
+@neutron.skip_if_missing_networking_extensions('l3-ha')
+class NetworkWithL3HAStackFixture(NetworkStackFixture):
+    ha = True
+
+
 @neutron.skip_if_missing_networking_extensions('security-group')
 class SecurityGroupsFixture(heat.HeatStackFixture):
     """Heat stack with some security groups
diff --git a/tobiko/openstack/stacks/neutron/network.yaml b/tobiko/openstack/stacks/neutron/network.yaml
index 5904b711a..de132a06c 100644
--- a/tobiko/openstack/stacks/neutron/network.yaml
+++ b/tobiko/openstack/stacks/neutron/network.yaml
@@ -12,7 +12,7 @@ parameters:
     type: boolean
     default: false
 
-  value_specs:
+  network_value_specs:
     description: Extra network creation parameters
     type: json
     default: {}
@@ -79,8 +79,18 @@ parameters:
     constraints:
     - custom_constraint: neutron.network
 
+  gateway_value_specs:
+    description: Extra gateway router creation parameters
+    type: json
+    default: {}
+
   has_net_mtu:
-    description: whenever net mtu extension is available
+    description: whenever net-mtu extension is available
+    type: boolean
+    default: false
+
+  has_l3_ha:
+    description: whenever l3-ha extension is available
     type: boolean
     default: false
 
@@ -108,6 +118,11 @@ conditions:
   has_net_mtu:
     get_param: has_net_mtu
 
+  has_l3_ha:
+    and:
+    - get_param: has_l3_ha
+    - get_param: has_gateway
+
 
 resources:
 
@@ -115,7 +130,7 @@ resources:
     type: OS::Neutron::Net
     properties:
       port_security_enabled: {get_param: port_security_enabled}
-      value_specs: {get_param: value_specs}
+      value_specs: {get_param: network_value_specs}
 
   ipv4_subnet:
     type: OS::Neutron::Subnet
@@ -143,6 +158,7 @@ resources:
     properties:
       external_gateway_info:
         network: {get_param: gateway_network}
+      value_specs: {get_param: gateway_value_specs}
 
   ipv4_gateway_interface:
     type: OS::Neutron::RouterInterface
diff --git a/tobiko/tests/scenario/neutron/test_floating_ip.py b/tobiko/tests/scenario/neutron/test_floating_ip.py
index 8c42bd3fc..30992e488 100644
--- a/tobiko/tests/scenario/neutron/test_floating_ip.py
+++ b/tobiko/tests/scenario/neutron/test_floating_ip.py
@@ -90,7 +90,7 @@ class FloatingIPTest(base.TobikoTest):
         """Actual port security group"""
         return set(self.stack.outputs.security_groups)
 
-    # --- test net-mtu and net-mtu-writable extensions -----------------------
+    # --- test net-mtu and net-mtu-writable extensions ------------------------
 
     @neutron.skip_if_missing_networking_extensions('net-mtu')
     def test_ping_with_net_mtu(self):
@@ -113,6 +113,15 @@ class FloatingIPTest(base.TobikoTest):
         """Actual MTU value for internal network"""
         return self.stack.network_stack.outputs.mtu
 
+    # --- test l3_ha extension ------------------------------------------------
+
+    @neutron.skip_if_missing_networking_extensions('l3-ha')
+    def test_l3_ha(self):
+        """Test 'mtu' network attribute"""
+        gateway = self.stack.network_stack.gateway_details
+        self.assertEqual(self.stack.network_stack.ha,
+                         gateway['ha'])
+
 
 # --- Test with port security enabled -----------------------------------------
 
@@ -222,3 +231,24 @@ class FloatingIpWithMtuWritableTest(FloatingIPTest):
     def expected_net_mtu(self):
         """Expected MTU value for internal network"""
         return self.stack.network_stack.custom_mtu_size
+
+
+# --- Test la-h3 extension --------------------------------------------
+
+@neutron.skip_if_missing_networking_extensions('l3-ha')
+class FloatingIPWithL3HAFixture(stacks.CirrosServerStackFixture):
+    """Heat stack for testing floating IP with a custom MTU network value"""
+
+    #: Heat stack for creating internal network with custom MTU value
+    network_stack = tobiko.required_setup_fixture(
+        stacks.NetworkWithL3HAStackFixture)
+
+
+@neutron.skip_if_missing_networking_extensions('l3-ha')
+@neutron.skip_if_missing_networking_agents(binary='neutron-l3-agent',
+                                           count=2)
+class NetworkWithL3HATest(FloatingIPTest):
+    """Tests connectivity via floating IP with a custom MTU value"""
+
+    #: Resources stack with floating IP and Nova server
+    stack = tobiko.required_setup_fixture(FloatingIPWithL3HAFixture)