diff --git a/acceptance/openstack/networking/v2/port_test.go b/acceptance/openstack/networking/v2/port_test.go
index 03e8e27..91bf5bd 100644
--- a/acceptance/openstack/networking/v2/port_test.go
+++ b/acceptance/openstack/networking/v2/port_test.go
@@ -45,10 +45,20 @@
 	th.AssertEquals(t, p.ID, portID)
 
 	// Update port
-	p, err = ports.Update(Client, portID, ports.UpdateOpts{Name: "new_port_name"}).Extract()
+	updateOpts := ports.UpdateOpts{
+		Name: "new_port_name",
+		AllowedAddressPairs: []ports.AddressPair{
+			ports.AddressPair{IPAddress: "192.168.199.201"},
+		},
+	}
+	p, err = ports.Update(Client, portID, updateOpts).Extract()
+
 	th.AssertNoErr(t, err)
 	th.AssertEquals(t, p.Name, "new_port_name")
 
+	updatedPort, err := ports.Get(Client, portID).Extract()
+	th.AssertEquals(t, updatedPort.AllowedAddressPairs[0].IPAddress, "192.168.199.201")
+
 	// Delete port
 	res := ports.Delete(Client, portID)
 	th.AssertNoErr(t, res.Err)
@@ -82,8 +92,8 @@
 		th.AssertNoErr(t, err)
 
 		for _, p := range portList {
-			t.Logf("Port: ID [%s] Name [%s] Status [%s] MAC addr [%s] Fixed IPs [%#v] Security groups [%#v]",
-				p.ID, p.Name, p.Status, p.MACAddress, p.FixedIPs, p.SecurityGroups)
+			t.Logf("Port: ID [%s] Name [%s] Status [%s] MAC addr [%s] Fixed IPs [%#v] Security groups [%#v] Allowed Address Pairs [%#v]",
+				p.ID, p.Name, p.Status, p.MACAddress, p.FixedIPs, p.SecurityGroups, p.AllowedAddressPairs)
 		}
 
 		return true, nil
@@ -108,6 +118,9 @@
 		IPVersion:  subnets.IPv4,
 		Name:       "my_subnet",
 		EnableDHCP: subnets.Down,
+		AllocationPools: []subnets.AllocationPool{
+			subnets.AllocationPool{Start: "192.168.199.2", End: "192.168.199.200"},
+		},
 	}).Extract()
 	return s.ID, err
 }
diff --git a/openstack/db/v1/configurations/results.go b/openstack/db/v1/configurations/results.go
index 37a77ad..d0d1d6e 100644
--- a/openstack/db/v1/configurations/results.go
+++ b/openstack/db/v1/configurations/results.go
@@ -1,6 +1,8 @@
 package configurations
 
 import (
+	"fmt"
+	"reflect"
 	"time"
 
 	"github.com/mitchellh/mapstructure"
@@ -43,12 +45,18 @@
 		Configs []Config `mapstructure:"configurations" json:"configurations"`
 	}
 
-	err := mapstructure.Decode(casted, &resp)
+	if err := mapstructure.Decode(casted, &resp); err != nil {
+		return nil, err
+	}
 
 	var vals []interface{}
-	switch (casted).(type) {
-	case interface{}:
+	switch casted.(type) {
+	case map[string]interface{}:
 		vals = casted.(map[string]interface{})["configurations"].([]interface{})
+	case map[string][]interface{}:
+		vals = casted.(map[string][]interface{})["configurations"]
+	default:
+		return resp.Configs, fmt.Errorf("Unknown type: %v", reflect.TypeOf(casted))
 	}
 
 	for i, v := range vals {
@@ -71,7 +79,7 @@
 		}
 	}
 
-	return resp.Configs, err
+	return resp.Configs, nil
 }
 
 type commonResult struct {
diff --git a/openstack/db/v1/instances/results.go b/openstack/db/v1/instances/results.go
index 9a49510..95aed16 100644
--- a/openstack/db/v1/instances/results.go
+++ b/openstack/db/v1/instances/results.go
@@ -1,6 +1,8 @@
 package instances
 
 import (
+	"fmt"
+	"reflect"
 	"time"
 
 	"github.com/mitchellh/mapstructure"
@@ -142,16 +144,22 @@
 func ExtractInstances(page pagination.Page) ([]Instance, error) {
 	casted := page.(InstancePage).Body
 
-	var response struct {
+	var resp struct {
 		Instances []Instance `mapstructure:"instances"`
 	}
 
-	err := mapstructure.Decode(casted, &response)
+	if err := mapstructure.Decode(casted, &resp); err != nil {
+		return nil, err
+	}
 
 	var vals []interface{}
-	switch (casted).(type) {
-	case interface{}:
+	switch casted.(type) {
+	case map[string]interface{}:
 		vals = casted.(map[string]interface{})["instances"].([]interface{})
+	case map[string][]interface{}:
+		vals = casted.(map[string][]interface{})["instances"]
+	default:
+		return resp.Instances, fmt.Errorf("Unknown type: %v", reflect.TypeOf(casted))
 	}
 
 	for i, v := range vals {
@@ -160,21 +168,21 @@
 		if t, ok := val["created"].(string); ok && t != "" {
 			creationTime, err := time.Parse(time.RFC3339, t)
 			if err != nil {
-				return response.Instances, err
+				return resp.Instances, err
 			}
-			response.Instances[i].Created = creationTime
+			resp.Instances[i].Created = creationTime
 		}
 
 		if t, ok := val["updated"].(string); ok && t != "" {
 			updatedTime, err := time.Parse(time.RFC3339, t)
 			if err != nil {
-				return response.Instances, err
+				return resp.Instances, err
 			}
-			response.Instances[i].Updated = updatedTime
+			resp.Instances[i].Updated = updatedTime
 		}
 	}
 
-	return response.Instances, err
+	return resp.Instances, nil
 }
 
 // UserRootResult represents the result of an operation to enable the root user.
diff --git a/openstack/networking/v2/ports/requests.go b/openstack/networking/v2/ports/requests.go
index 2caf1ca..e73e10a 100644
--- a/openstack/networking/v2/ports/requests.go
+++ b/openstack/networking/v2/ports/requests.go
@@ -95,15 +95,16 @@
 
 // CreateOpts represents the attributes used when creating a new port.
 type CreateOpts struct {
-	NetworkID      string
-	Name           string
-	AdminStateUp   *bool
-	MACAddress     string
-	FixedIPs       interface{}
-	DeviceID       string
-	DeviceOwner    string
-	TenantID       string
-	SecurityGroups []string
+	NetworkID           string
+	Name                string
+	AdminStateUp        *bool
+	MACAddress          string
+	FixedIPs            interface{}
+	DeviceID            string
+	DeviceOwner         string
+	TenantID            string
+	SecurityGroups      []string
+	AllowedAddressPairs []AddressPair
 }
 
 // ToPortCreateMap casts a CreateOpts struct to a map.
@@ -139,6 +140,9 @@
 	if opts.MACAddress != "" {
 		p["mac_address"] = opts.MACAddress
 	}
+	if opts.AllowedAddressPairs != nil {
+		p["allowed_address_pairs"] = opts.AllowedAddressPairs
+	}
 
 	return map[string]interface{}{"port": p}, nil
 }
@@ -168,12 +172,13 @@
 
 // UpdateOpts represents the attributes used when updating an existing port.
 type UpdateOpts struct {
-	Name           string
-	AdminStateUp   *bool
-	FixedIPs       interface{}
-	DeviceID       string
-	DeviceOwner    string
-	SecurityGroups []string
+	Name                string
+	AdminStateUp        *bool
+	FixedIPs            interface{}
+	DeviceID            string
+	DeviceOwner         string
+	SecurityGroups      []string
+	AllowedAddressPairs []AddressPair
 }
 
 // ToPortUpdateMap casts an UpdateOpts struct to a map.
@@ -198,6 +203,9 @@
 	if opts.Name != "" {
 		p["name"] = opts.Name
 	}
+	if opts.AllowedAddressPairs != nil {
+		p["allowed_address_pairs"] = opts.AllowedAddressPairs
+	}
 
 	return map[string]interface{}{"port": p}, nil
 }
diff --git a/openstack/networking/v2/ports/requests_test.go b/openstack/networking/v2/ports/requests_test.go
index 9e323ef..b442996 100644
--- a/openstack/networking/v2/ports/requests_test.go
+++ b/openstack/networking/v2/ports/requests_test.go
@@ -164,7 +164,13 @@
 								"ip_address": "10.0.0.2"
 						}
 				],
-				"security_groups": ["foo"]
+				"security_groups": ["foo"],
+        "allowed_address_pairs": [
+          {
+            "ip_address": "10.0.0.4",
+            "mac_address": "fa:16:3e:c9:cb:f0"
+          }
+        ]
     }
 }
 			`)
@@ -177,7 +183,6 @@
     "port": {
         "status": "DOWN",
         "name": "private-port",
-        "allowed_address_pairs": [],
         "admin_state_up": true,
         "network_id": "a87cc70a-3e15-4acf-8205-9b711a3531b7",
         "tenant_id": "d6700c0c9ffa4f1cb322cd4a1f3906fa",
@@ -193,6 +198,12 @@
         "security_groups": [
             "f0ac4394-7e4a-4409-9701-ba8be283dbc3"
         ],
+        "allowed_address_pairs": [
+          {
+            "ip_address": "10.0.0.4",
+            "mac_address": "fa:16:3e:c9:cb:f0"
+          }
+        ],
         "device_id": ""
     }
 }
@@ -208,6 +219,9 @@
 			IP{SubnetID: "a0304c3a-4f08-4c43-88af-d796509c97d2", IPAddress: "10.0.0.2"},
 		},
 		SecurityGroups: []string{"foo"},
+		AllowedAddressPairs: []AddressPair{
+			AddressPair{IPAddress: "10.0.0.4", MACAddress: "fa:16:3e:c9:cb:f0"},
+		},
 	}
 	n, err := Create(fake.ServiceClient(), options).Extract()
 	th.AssertNoErr(t, err)
@@ -224,6 +238,9 @@
 	})
 	th.AssertEquals(t, n.ID, "65c0ee9f-d634-4522-8954-51021b570b0d")
 	th.AssertDeepEquals(t, n.SecurityGroups, []string{"f0ac4394-7e4a-4409-9701-ba8be283dbc3"})
+	th.AssertDeepEquals(t, n.AllowedAddressPairs, []AddressPair{
+		AddressPair{IPAddress: "10.0.0.4", MACAddress: "fa:16:3e:c9:cb:f0"},
+	})
 }
 
 func TestRequiredCreateOpts(t *testing.T) {
@@ -252,6 +269,12 @@
                 "ip_address": "10.0.0.3"
             }
         ],
+        "allowed_address_pairs": [
+          {
+            "ip_address": "10.0.0.4",
+            "mac_address": "fa:16:3e:c9:cb:f0"
+          }
+        ],
 				"security_groups": [
             "f0ac4394-7e4a-4409-9701-ba8be283dbc3"
         ]
@@ -278,6 +301,12 @@
                 "ip_address": "10.0.0.3"
             }
         ],
+        "allowed_address_pairs": [
+          {
+            "ip_address": "10.0.0.4",
+            "mac_address": "fa:16:3e:c9:cb:f0"
+          }
+        ],
         "id": "65c0ee9f-d634-4522-8954-51021b570b0d",
         "security_groups": [
             "f0ac4394-7e4a-4409-9701-ba8be283dbc3"
@@ -294,6 +323,9 @@
 			IP{SubnetID: "a0304c3a-4f08-4c43-88af-d796509c97d2", IPAddress: "10.0.0.3"},
 		},
 		SecurityGroups: []string{"f0ac4394-7e4a-4409-9701-ba8be283dbc3"},
+		AllowedAddressPairs: []AddressPair{
+			AddressPair{IPAddress: "10.0.0.4", MACAddress: "fa:16:3e:c9:cb:f0"},
+		},
 	}
 
 	s, err := Update(fake.ServiceClient(), "65c0ee9f-d634-4522-8954-51021b570b0d", options).Extract()
@@ -303,6 +335,9 @@
 	th.AssertDeepEquals(t, s.FixedIPs, []IP{
 		IP{SubnetID: "a0304c3a-4f08-4c43-88af-d796509c97d2", IPAddress: "10.0.0.3"},
 	})
+	th.AssertDeepEquals(t, s.AllowedAddressPairs, []AddressPair{
+		AddressPair{IPAddress: "10.0.0.4", MACAddress: "fa:16:3e:c9:cb:f0"},
+	})
 	th.AssertDeepEquals(t, s.SecurityGroups, []string{"f0ac4394-7e4a-4409-9701-ba8be283dbc3"})
 }
 
diff --git a/openstack/networking/v2/ports/results.go b/openstack/networking/v2/ports/results.go
index 2511ff5..1f7eea1 100644
--- a/openstack/networking/v2/ports/results.go
+++ b/openstack/networking/v2/ports/results.go
@@ -19,7 +19,6 @@
 	var res struct {
 		Port *Port `json:"port"`
 	}
-
 	err := mapstructure.Decode(r.Body, &res)
 
 	return res.Port, err
@@ -51,6 +50,11 @@
 	IPAddress string `mapstructure:"ip_address" json:"ip_address,omitempty"`
 }
 
+type AddressPair struct {
+	IPAddress  string `mapstructure:"ip_address" json:"ip_address,omitempty"`
+	MACAddress string `mapstructure:"mac_address" json:"mac_address,omitempty"`
+}
+
 // Port represents a Neutron port. See package documentation for a top-level
 // description of what this is.
 type Port struct {
@@ -78,6 +82,8 @@
 	SecurityGroups []string `mapstructure:"security_groups" json:"security_groups"`
 	// Identifies the device (e.g., virtual server) using this port.
 	DeviceID string `mapstructure:"device_id" json:"device_id"`
+	// Identifies the list of IP addresses the port will recognize/accept
+	AllowedAddressPairs []AddressPair `mapstructure:"allowed_address_pairs" json:"allowed_address_pairs"`
 }
 
 // PortPage is the page returned by a pager when traversing over a collection
diff --git a/provider_client.go b/provider_client.go
index 9264355..152a091 100644
--- a/provider_client.go
+++ b/provider_client.go
@@ -246,6 +246,8 @@
 		return []int{201, 202}
 	case method == "PUT":
 		return []int{201, 202}
+	case method == "PATCH":
+		return []int{200, 204}
 	case method == "DELETE":
 		return []int{202, 204}
 	}
@@ -299,6 +301,24 @@
 	return client.Request("PUT", url, *opts)
 }
 
+func (client *ProviderClient) Patch(url string, JSONBody interface{}, JSONResponse *interface{}, opts *RequestOpts) (*http.Response, error) {
+	if opts == nil {
+		opts = &RequestOpts{}
+	}
+
+	if v, ok := (JSONBody).(io.ReadSeeker); ok {
+		opts.RawBody = v
+	} else if JSONBody != nil {
+		opts.JSONBody = JSONBody
+	}
+
+	if JSONResponse != nil {
+		opts.JSONResponse = JSONResponse
+	}
+
+	return client.Request("PATCH", url, *opts)
+}
+
 func (client *ProviderClient) Delete(url string, opts *RequestOpts) (*http.Response, error) {
 	if opts == nil {
 		opts = &RequestOpts{}
diff --git a/rackspace/db/v1/backups/results.go b/rackspace/db/v1/backups/results.go
index 82b551d..04faf32 100644
--- a/rackspace/db/v1/backups/results.go
+++ b/rackspace/db/v1/backups/results.go
@@ -1,6 +1,8 @@
 package backups
 
 import (
+	"fmt"
+	"reflect"
 	"time"
 
 	"github.com/mitchellh/mapstructure"
@@ -109,12 +111,18 @@
 		Backups []Backup `mapstructure:"backups" json:"backups"`
 	}
 
-	err := mapstructure.Decode(casted, &resp)
+	if err := mapstructure.Decode(casted, &resp); err != nil {
+		return nil, err
+	}
 
 	var vals []interface{}
-	switch (casted).(type) {
-	case interface{}:
+	switch casted.(type) {
+	case map[string]interface{}:
 		vals = casted.(map[string]interface{})["backups"].([]interface{})
+	case map[string][]interface{}:
+		vals = casted.(map[string][]interface{})["backups"]
+	default:
+		return resp.Backups, fmt.Errorf("Unknown type: %v", reflect.TypeOf(casted))
 	}
 
 	for i, v := range vals {
@@ -137,5 +145,5 @@
 		}
 	}
 
-	return resp.Backups, err
+	return resp.Backups, nil
 }
diff --git a/rackspace/db/v1/instances/results.go b/rackspace/db/v1/instances/results.go
index 4b1317e..cdcc9c7 100644
--- a/rackspace/db/v1/instances/results.go
+++ b/rackspace/db/v1/instances/results.go
@@ -1,6 +1,8 @@
 package instances
 
 import (
+	"fmt"
+	"reflect"
 	"time"
 
 	"github.com/mitchellh/mapstructure"
@@ -147,16 +149,22 @@
 func ExtractInstances(page pagination.Page) ([]Instance, error) {
 	casted := page.(os.InstancePage).Body
 
-	var response struct {
+	var resp struct {
 		Instances []Instance `mapstructure:"instances"`
 	}
 
-	err := mapstructure.Decode(casted, &response)
+	if err := mapstructure.Decode(casted, &resp); err != nil {
+		return nil, err
+	}
 
 	var vals []interface{}
-	switch (casted).(type) {
-	case interface{}:
+	switch casted.(type) {
+	case map[string]interface{}:
 		vals = casted.(map[string]interface{})["instances"].([]interface{})
+	case map[string][]interface{}:
+		vals = casted.(map[string][]interface{})["instances"]
+	default:
+		return resp.Instances, fmt.Errorf("Unknown type: %v", reflect.TypeOf(casted))
 	}
 
 	for i, v := range vals {
@@ -165,19 +173,19 @@
 		if t, ok := val["created"].(string); ok && t != "" {
 			creationTime, err := time.Parse(time.RFC3339, t)
 			if err != nil {
-				return response.Instances, err
+				return resp.Instances, err
 			}
-			response.Instances[i].Created = creationTime
+			resp.Instances[i].Created = creationTime
 		}
 
 		if t, ok := val["updated"].(string); ok && t != "" {
 			updatedTime, err := time.Parse(time.RFC3339, t)
 			if err != nil {
-				return response.Instances, err
+				return resp.Instances, err
 			}
-			response.Instances[i].Updated = updatedTime
+			resp.Instances[i].Updated = updatedTime
 		}
 	}
 
-	return response.Instances, err
+	return resp.Instances, nil
 }