diff --git a/sdk/peering/azure-mgmt-peering/HISTORY.rst b/sdk/peering/azure-mgmt-peering/HISTORY.rst
index 8a589f5f9a92..d3b55bbc1ccd 100644
--- a/sdk/peering/azure-mgmt-peering/HISTORY.rst
+++ b/sdk/peering/azure-mgmt-peering/HISTORY.rst
@@ -3,6 +3,13 @@
 Release History
 ===============
 
+0.1.0rc2 (2019-10-24)
++++++++++++++++++++++
+
+**Breaking changes**
+
+- Migrated operations from PeeringServicePrefixesOperations to PrefixesOperations
+
 0.1.0rc1 (2019-09-26)
 +++++++++++++++++++++
 
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/_peering_management_client.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/_peering_management_client.py
index 6509e2c4056a..9e303a0aa953 100644
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/_peering_management_client.py
+++ b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/_peering_management_client.py
@@ -20,7 +20,6 @@
 from .operations import PeeringLocationsOperations
 from .operations import PeeringsOperations
 from .operations import PeeringServiceLocationsOperations
-from .operations import PeeringServicePrefixesOperations
 from .operations import PrefixesOperations
 from .operations import PeeringServiceProvidersOperations
 from .operations import PeeringServicesOperations
@@ -45,8 +44,6 @@ class PeeringManagementClient(PeeringManagementClientOperationsMixin, SDKClient)
     :vartype peerings: azure.mgmt.peering.operations.PeeringsOperations
     :ivar peering_service_locations: PeeringServiceLocations operations
     :vartype peering_service_locations: azure.mgmt.peering.operations.PeeringServiceLocationsOperations
-    :ivar peering_service_prefixes: PeeringServicePrefixes operations
-    :vartype peering_service_prefixes: azure.mgmt.peering.operations.PeeringServicePrefixesOperations
     :ivar prefixes: Prefixes operations
     :vartype prefixes: azure.mgmt.peering.operations.PrefixesOperations
     :ivar peering_service_providers: PeeringServiceProviders operations
@@ -69,7 +66,7 @@ def __init__(
         super(PeeringManagementClient, self).__init__(self.config.credentials, self.config)
 
         client_models = {k: v for k, v in models.__dict__.items() if isinstance(v, type)}
-        self.api_version = '2019-08-01-preview'
+        self.api_version = '2019-09-01-preview'
         self._serialize = Serializer(client_models)
         self._deserialize = Deserializer(client_models)
 
@@ -85,8 +82,6 @@ def __init__(
             self._client, self.config, self._serialize, self._deserialize)
         self.peering_service_locations = PeeringServiceLocationsOperations(
             self._client, self.config, self._serialize, self._deserialize)
-        self.peering_service_prefixes = PeeringServicePrefixesOperations(
-            self._client, self.config, self._serialize, self._deserialize)
         self.prefixes = PrefixesOperations(
             self._client, self.config, self._serialize, self._deserialize)
         self.peering_service_providers = PeeringServiceProvidersOperations(
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/models/__init__.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/models/__init__.py
index 76921f6bcfa8..afe897a2a540 100644
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/models/__init__.py
+++ b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/models/__init__.py
@@ -31,6 +31,7 @@
     from ._models_py3 import PeeringService
     from ._models_py3 import PeeringServiceLocation
     from ._models_py3 import PeeringServicePrefix
+    from ._models_py3 import PeeringServicePrefixEvent
     from ._models_py3 import PeeringServiceProvider
     from ._models_py3 import PeeringSku
     from ._models_py3 import Resource
@@ -58,6 +59,7 @@
     from ._models import PeeringService
     from ._models import PeeringServiceLocation
     from ._models import PeeringServicePrefix
+    from ._models import PeeringServicePrefixEvent
     from ._models import PeeringServiceProvider
     from ._models import PeeringSku
     from ._models import Resource
@@ -110,6 +112,7 @@
     'PeeringService',
     'PeeringServiceLocation',
     'PeeringServicePrefix',
+    'PeeringServicePrefixEvent',
     'PeeringServiceProvider',
     'PeeringSku',
     'Resource',
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/models/_models.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/models/_models.py
index 60ac670ced22..fc31afd88ca0 100644
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/models/_models.py
+++ b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/models/_models.py
@@ -149,9 +149,9 @@ class DirectConnection(Model):
 
     :param bandwidth_in_mbps: The bandwidth of the connection.
     :type bandwidth_in_mbps: int
-    :param provisioned_bandwidth_in_mbps: The bandwidth that is actually
+    :ivar provisioned_bandwidth_in_mbps: The bandwidth that is actually
      provisioned.
-    :type provisioned_bandwidth_in_mbps: int
+    :vartype provisioned_bandwidth_in_mbps: int
     :param session_address_provider: The field indicating if Microsoft
      provides session ip addresses. Possible values include: 'Microsoft',
      'Peer'
@@ -173,10 +173,15 @@ class DirectConnection(Model):
     :param connection_identifier: The unique identifier (GUID) for the
      connection.
     :type connection_identifier: str
+    :ivar error_message: The error message related to the connection state, if
+     any.
+    :vartype error_message: str
     """
 
     _validation = {
+        'provisioned_bandwidth_in_mbps': {'readonly': True},
         'connection_state': {'readonly': True},
+        'error_message': {'readonly': True},
     }
 
     _attribute_map = {
@@ -188,18 +193,20 @@ class DirectConnection(Model):
         'connection_state': {'key': 'connectionState', 'type': 'str'},
         'bgp_session': {'key': 'bgpSession', 'type': 'BgpSession'},
         'connection_identifier': {'key': 'connectionIdentifier', 'type': 'str'},
+        'error_message': {'key': 'errorMessage', 'type': 'str'},
     }
 
     def __init__(self, **kwargs):
         super(DirectConnection, self).__init__(**kwargs)
         self.bandwidth_in_mbps = kwargs.get('bandwidth_in_mbps', None)
-        self.provisioned_bandwidth_in_mbps = kwargs.get('provisioned_bandwidth_in_mbps', None)
+        self.provisioned_bandwidth_in_mbps = None
         self.session_address_provider = kwargs.get('session_address_provider', None)
         self.use_for_peering_service = kwargs.get('use_for_peering_service', None)
         self.peering_db_facility_id = kwargs.get('peering_db_facility_id', None)
         self.connection_state = None
         self.bgp_session = kwargs.get('bgp_session', None)
         self.connection_identifier = kwargs.get('connection_identifier', None)
+        self.error_message = None
 
 
 class DirectPeeringFacility(Model):
@@ -291,10 +298,14 @@ class ExchangeConnection(Model):
     :param connection_identifier: The unique identifier (GUID) for the
      connection.
     :type connection_identifier: str
+    :ivar error_message: The error message related to the connection state, if
+     any.
+    :vartype error_message: str
     """
 
     _validation = {
         'connection_state': {'readonly': True},
+        'error_message': {'readonly': True},
     }
 
     _attribute_map = {
@@ -302,6 +313,7 @@ class ExchangeConnection(Model):
         'connection_state': {'key': 'connectionState', 'type': 'str'},
         'bgp_session': {'key': 'bgpSession', 'type': 'BgpSession'},
         'connection_identifier': {'key': 'connectionIdentifier', 'type': 'str'},
+        'error_message': {'key': 'errorMessage', 'type': 'str'},
     }
 
     def __init__(self, **kwargs):
@@ -310,6 +322,7 @@ def __init__(self, **kwargs):
         self.connection_state = None
         self.bgp_session = kwargs.get('bgp_session', None)
         self.connection_identifier = kwargs.get('connection_identifier', None)
+        self.error_message = None
 
 
 class ExchangePeeringFacility(Model):
@@ -487,12 +500,15 @@ class PeerAsn(Resource):
     :param validation_state: The validation state of the ASN associated with
      the peer. Possible values include: 'None', 'Pending', 'Approved', 'Failed'
     :type validation_state: str or ~azure.mgmt.peering.models.ValidationState
+    :ivar error_message: The error message for the validation state
+    :vartype error_message: str
     """
 
     _validation = {
         'name': {'readonly': True},
         'id': {'readonly': True},
         'type': {'readonly': True},
+        'error_message': {'readonly': True},
     }
 
     _attribute_map = {
@@ -503,6 +519,7 @@ class PeerAsn(Resource):
         'peer_contact_info': {'key': 'properties.peerContactInfo', 'type': 'ContactInfo'},
         'peer_name': {'key': 'properties.peerName', 'type': 'str'},
         'validation_state': {'key': 'properties.validationState', 'type': 'str'},
+        'error_message': {'key': 'properties.errorMessage', 'type': 'str'},
     }
 
     def __init__(self, **kwargs):
@@ -511,6 +528,7 @@ def __init__(self, **kwargs):
         self.peer_contact_info = kwargs.get('peer_contact_info', None)
         self.peer_name = kwargs.get('peer_name', None)
         self.validation_state = kwargs.get('validation_state', None)
+        self.error_message = None
 
 
 class Peering(Resource):
@@ -709,12 +727,15 @@ def __init__(self, **kwargs):
 class PeeringPropertiesDirect(Model):
     """The properties that define a direct peering.
 
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
     :param connections: The set of connections that constitute a direct
      peering.
     :type connections: list[~azure.mgmt.peering.models.DirectConnection]
-    :param use_for_peering_service: The flag that indicates whether or not the
+    :ivar use_for_peering_service: The flag that indicates whether or not the
      peering is used for peering service.
-    :type use_for_peering_service: bool
+    :vartype use_for_peering_service: bool
     :param peer_asn: The reference of the peer ASN.
     :type peer_asn: ~azure.mgmt.peering.models.SubResource
     :param direct_peering_type: The type of direct peering. Possible values
@@ -723,6 +744,10 @@ class PeeringPropertiesDirect(Model):
      ~azure.mgmt.peering.models.DirectPeeringType
     """
 
+    _validation = {
+        'use_for_peering_service': {'readonly': True},
+    }
+
     _attribute_map = {
         'connections': {'key': 'connections', 'type': '[DirectConnection]'},
         'use_for_peering_service': {'key': 'useForPeeringService', 'type': 'bool'},
@@ -733,7 +758,7 @@ class PeeringPropertiesDirect(Model):
     def __init__(self, **kwargs):
         super(PeeringPropertiesDirect, self).__init__(**kwargs)
         self.connections = kwargs.get('connections', None)
-        self.use_for_peering_service = kwargs.get('use_for_peering_service', None)
+        self.use_for_peering_service = None
         self.peer_asn = kwargs.get('peer_asn', None)
         self.direct_peering_type = kwargs.get('direct_peering_type', None)
 
@@ -870,16 +895,21 @@ class PeeringServicePrefix(Resource):
     :vartype id: str
     :ivar type: The type of the resource.
     :vartype type: str
-    :param prefix: Valid route prefix
+    :param prefix: The prefix from which your traffic originates.
     :type prefix: str
-    :param prefix_validation_state: The prefix validation state. Possible
+    :ivar prefix_validation_state: The prefix validation state. Possible
      values include: 'None', 'Invalid', 'Verified', 'Failed', 'Pending',
-     'Unknown'
-    :type prefix_validation_state: str or
+     'Warning', 'Unknown'
+    :vartype prefix_validation_state: str or
      ~azure.mgmt.peering.models.PrefixValidationState
-    :param learned_type: The prefix learned type. Possible values include:
-     'None', 'ViaPartner', 'ViaSession'
-    :type learned_type: str or ~azure.mgmt.peering.models.LearnedType
+    :ivar learned_type: The prefix learned type. Possible values include:
+     'None', 'ViaServiceProvider', 'ViaSession'
+    :vartype learned_type: str or ~azure.mgmt.peering.models.LearnedType
+    :ivar error_message: The error message for validation state
+    :vartype error_message: str
+    :ivar events: The list of events for peering service prefix
+    :vartype events:
+     list[~azure.mgmt.peering.models.PeeringServicePrefixEvent]
     :ivar provisioning_state: The provisioning state of the resource. Possible
      values include: 'Succeeded', 'Updating', 'Deleting', 'Failed'
     :vartype provisioning_state: str or
@@ -890,6 +920,10 @@ class PeeringServicePrefix(Resource):
         'name': {'readonly': True},
         'id': {'readonly': True},
         'type': {'readonly': True},
+        'prefix_validation_state': {'readonly': True},
+        'learned_type': {'readonly': True},
+        'error_message': {'readonly': True},
+        'events': {'readonly': True},
         'provisioning_state': {'readonly': True},
     }
 
@@ -900,17 +934,66 @@ class PeeringServicePrefix(Resource):
         'prefix': {'key': 'properties.prefix', 'type': 'str'},
         'prefix_validation_state': {'key': 'properties.prefixValidationState', 'type': 'str'},
         'learned_type': {'key': 'properties.learnedType', 'type': 'str'},
+        'error_message': {'key': 'properties.errorMessage', 'type': 'str'},
+        'events': {'key': 'properties.events', 'type': '[PeeringServicePrefixEvent]'},
         'provisioning_state': {'key': 'properties.provisioningState', 'type': 'str'},
     }
 
     def __init__(self, **kwargs):
         super(PeeringServicePrefix, self).__init__(**kwargs)
         self.prefix = kwargs.get('prefix', None)
-        self.prefix_validation_state = kwargs.get('prefix_validation_state', None)
-        self.learned_type = kwargs.get('learned_type', None)
+        self.prefix_validation_state = None
+        self.learned_type = None
+        self.error_message = None
+        self.events = None
         self.provisioning_state = None
 
 
+class PeeringServicePrefixEvent(Model):
+    """The details of the event associated with a prefix.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar event_timestamp: The timestamp of the event associated with a
+     prefix.
+    :vartype event_timestamp: datetime
+    :ivar event_type: The type of the event associated with a prefix.
+    :vartype event_type: str
+    :ivar event_summary: The summary of the event associated with a prefix.
+    :vartype event_summary: str
+    :ivar event_level: The level of the event associated with a prefix.
+    :vartype event_level: str
+    :ivar event_description: The description of the event associated with a
+     prefix.
+    :vartype event_description: str
+    """
+
+    _validation = {
+        'event_timestamp': {'readonly': True},
+        'event_type': {'readonly': True},
+        'event_summary': {'readonly': True},
+        'event_level': {'readonly': True},
+        'event_description': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'event_timestamp': {'key': 'eventTimestamp', 'type': 'iso-8601'},
+        'event_type': {'key': 'eventType', 'type': 'str'},
+        'event_summary': {'key': 'eventSummary', 'type': 'str'},
+        'event_level': {'key': 'eventLevel', 'type': 'str'},
+        'event_description': {'key': 'eventDescription', 'type': 'str'},
+    }
+
+    def __init__(self, **kwargs):
+        super(PeeringServicePrefixEvent, self).__init__(**kwargs)
+        self.event_timestamp = None
+        self.event_type = None
+        self.event_summary = None
+        self.event_level = None
+        self.event_description = None
+
+
 class PeeringServiceProvider(Resource):
     """PeeringService provider.
 
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/models/_models_py3.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/models/_models_py3.py
index 6f78c6170d1e..d92200c18eea 100644
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/models/_models_py3.py
+++ b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/models/_models_py3.py
@@ -149,9 +149,9 @@ class DirectConnection(Model):
 
     :param bandwidth_in_mbps: The bandwidth of the connection.
     :type bandwidth_in_mbps: int
-    :param provisioned_bandwidth_in_mbps: The bandwidth that is actually
+    :ivar provisioned_bandwidth_in_mbps: The bandwidth that is actually
      provisioned.
-    :type provisioned_bandwidth_in_mbps: int
+    :vartype provisioned_bandwidth_in_mbps: int
     :param session_address_provider: The field indicating if Microsoft
      provides session ip addresses. Possible values include: 'Microsoft',
      'Peer'
@@ -173,10 +173,15 @@ class DirectConnection(Model):
     :param connection_identifier: The unique identifier (GUID) for the
      connection.
     :type connection_identifier: str
+    :ivar error_message: The error message related to the connection state, if
+     any.
+    :vartype error_message: str
     """
 
     _validation = {
+        'provisioned_bandwidth_in_mbps': {'readonly': True},
         'connection_state': {'readonly': True},
+        'error_message': {'readonly': True},
     }
 
     _attribute_map = {
@@ -188,18 +193,20 @@ class DirectConnection(Model):
         'connection_state': {'key': 'connectionState', 'type': 'str'},
         'bgp_session': {'key': 'bgpSession', 'type': 'BgpSession'},
         'connection_identifier': {'key': 'connectionIdentifier', 'type': 'str'},
+        'error_message': {'key': 'errorMessage', 'type': 'str'},
     }
 
-    def __init__(self, *, bandwidth_in_mbps: int=None, provisioned_bandwidth_in_mbps: int=None, session_address_provider=None, use_for_peering_service: bool=None, peering_db_facility_id: int=None, bgp_session=None, connection_identifier: str=None, **kwargs) -> None:
+    def __init__(self, *, bandwidth_in_mbps: int=None, session_address_provider=None, use_for_peering_service: bool=None, peering_db_facility_id: int=None, bgp_session=None, connection_identifier: str=None, **kwargs) -> None:
         super(DirectConnection, self).__init__(**kwargs)
         self.bandwidth_in_mbps = bandwidth_in_mbps
-        self.provisioned_bandwidth_in_mbps = provisioned_bandwidth_in_mbps
+        self.provisioned_bandwidth_in_mbps = None
         self.session_address_provider = session_address_provider
         self.use_for_peering_service = use_for_peering_service
         self.peering_db_facility_id = peering_db_facility_id
         self.connection_state = None
         self.bgp_session = bgp_session
         self.connection_identifier = connection_identifier
+        self.error_message = None
 
 
 class DirectPeeringFacility(Model):
@@ -291,10 +298,14 @@ class ExchangeConnection(Model):
     :param connection_identifier: The unique identifier (GUID) for the
      connection.
     :type connection_identifier: str
+    :ivar error_message: The error message related to the connection state, if
+     any.
+    :vartype error_message: str
     """
 
     _validation = {
         'connection_state': {'readonly': True},
+        'error_message': {'readonly': True},
     }
 
     _attribute_map = {
@@ -302,6 +313,7 @@ class ExchangeConnection(Model):
         'connection_state': {'key': 'connectionState', 'type': 'str'},
         'bgp_session': {'key': 'bgpSession', 'type': 'BgpSession'},
         'connection_identifier': {'key': 'connectionIdentifier', 'type': 'str'},
+        'error_message': {'key': 'errorMessage', 'type': 'str'},
     }
 
     def __init__(self, *, peering_db_facility_id: int=None, bgp_session=None, connection_identifier: str=None, **kwargs) -> None:
@@ -310,6 +322,7 @@ def __init__(self, *, peering_db_facility_id: int=None, bgp_session=None, connec
         self.connection_state = None
         self.bgp_session = bgp_session
         self.connection_identifier = connection_identifier
+        self.error_message = None
 
 
 class ExchangePeeringFacility(Model):
@@ -487,12 +500,15 @@ class PeerAsn(Resource):
     :param validation_state: The validation state of the ASN associated with
      the peer. Possible values include: 'None', 'Pending', 'Approved', 'Failed'
     :type validation_state: str or ~azure.mgmt.peering.models.ValidationState
+    :ivar error_message: The error message for the validation state
+    :vartype error_message: str
     """
 
     _validation = {
         'name': {'readonly': True},
         'id': {'readonly': True},
         'type': {'readonly': True},
+        'error_message': {'readonly': True},
     }
 
     _attribute_map = {
@@ -503,6 +519,7 @@ class PeerAsn(Resource):
         'peer_contact_info': {'key': 'properties.peerContactInfo', 'type': 'ContactInfo'},
         'peer_name': {'key': 'properties.peerName', 'type': 'str'},
         'validation_state': {'key': 'properties.validationState', 'type': 'str'},
+        'error_message': {'key': 'properties.errorMessage', 'type': 'str'},
     }
 
     def __init__(self, *, peer_asn: int=None, peer_contact_info=None, peer_name: str=None, validation_state=None, **kwargs) -> None:
@@ -511,6 +528,7 @@ def __init__(self, *, peer_asn: int=None, peer_contact_info=None, peer_name: str
         self.peer_contact_info = peer_contact_info
         self.peer_name = peer_name
         self.validation_state = validation_state
+        self.error_message = None
 
 
 class Peering(Resource):
@@ -709,12 +727,15 @@ def __init__(self, *, peering_facilities=None, **kwargs) -> None:
 class PeeringPropertiesDirect(Model):
     """The properties that define a direct peering.
 
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
     :param connections: The set of connections that constitute a direct
      peering.
     :type connections: list[~azure.mgmt.peering.models.DirectConnection]
-    :param use_for_peering_service: The flag that indicates whether or not the
+    :ivar use_for_peering_service: The flag that indicates whether or not the
      peering is used for peering service.
-    :type use_for_peering_service: bool
+    :vartype use_for_peering_service: bool
     :param peer_asn: The reference of the peer ASN.
     :type peer_asn: ~azure.mgmt.peering.models.SubResource
     :param direct_peering_type: The type of direct peering. Possible values
@@ -723,6 +744,10 @@ class PeeringPropertiesDirect(Model):
      ~azure.mgmt.peering.models.DirectPeeringType
     """
 
+    _validation = {
+        'use_for_peering_service': {'readonly': True},
+    }
+
     _attribute_map = {
         'connections': {'key': 'connections', 'type': '[DirectConnection]'},
         'use_for_peering_service': {'key': 'useForPeeringService', 'type': 'bool'},
@@ -730,10 +755,10 @@ class PeeringPropertiesDirect(Model):
         'direct_peering_type': {'key': 'directPeeringType', 'type': 'str'},
     }
 
-    def __init__(self, *, connections=None, use_for_peering_service: bool=None, peer_asn=None, direct_peering_type=None, **kwargs) -> None:
+    def __init__(self, *, connections=None, peer_asn=None, direct_peering_type=None, **kwargs) -> None:
         super(PeeringPropertiesDirect, self).__init__(**kwargs)
         self.connections = connections
-        self.use_for_peering_service = use_for_peering_service
+        self.use_for_peering_service = None
         self.peer_asn = peer_asn
         self.direct_peering_type = direct_peering_type
 
@@ -870,16 +895,21 @@ class PeeringServicePrefix(Resource):
     :vartype id: str
     :ivar type: The type of the resource.
     :vartype type: str
-    :param prefix: Valid route prefix
+    :param prefix: The prefix from which your traffic originates.
     :type prefix: str
-    :param prefix_validation_state: The prefix validation state. Possible
+    :ivar prefix_validation_state: The prefix validation state. Possible
      values include: 'None', 'Invalid', 'Verified', 'Failed', 'Pending',
-     'Unknown'
-    :type prefix_validation_state: str or
+     'Warning', 'Unknown'
+    :vartype prefix_validation_state: str or
      ~azure.mgmt.peering.models.PrefixValidationState
-    :param learned_type: The prefix learned type. Possible values include:
-     'None', 'ViaPartner', 'ViaSession'
-    :type learned_type: str or ~azure.mgmt.peering.models.LearnedType
+    :ivar learned_type: The prefix learned type. Possible values include:
+     'None', 'ViaServiceProvider', 'ViaSession'
+    :vartype learned_type: str or ~azure.mgmt.peering.models.LearnedType
+    :ivar error_message: The error message for validation state
+    :vartype error_message: str
+    :ivar events: The list of events for peering service prefix
+    :vartype events:
+     list[~azure.mgmt.peering.models.PeeringServicePrefixEvent]
     :ivar provisioning_state: The provisioning state of the resource. Possible
      values include: 'Succeeded', 'Updating', 'Deleting', 'Failed'
     :vartype provisioning_state: str or
@@ -890,6 +920,10 @@ class PeeringServicePrefix(Resource):
         'name': {'readonly': True},
         'id': {'readonly': True},
         'type': {'readonly': True},
+        'prefix_validation_state': {'readonly': True},
+        'learned_type': {'readonly': True},
+        'error_message': {'readonly': True},
+        'events': {'readonly': True},
         'provisioning_state': {'readonly': True},
     }
 
@@ -900,17 +934,66 @@ class PeeringServicePrefix(Resource):
         'prefix': {'key': 'properties.prefix', 'type': 'str'},
         'prefix_validation_state': {'key': 'properties.prefixValidationState', 'type': 'str'},
         'learned_type': {'key': 'properties.learnedType', 'type': 'str'},
+        'error_message': {'key': 'properties.errorMessage', 'type': 'str'},
+        'events': {'key': 'properties.events', 'type': '[PeeringServicePrefixEvent]'},
         'provisioning_state': {'key': 'properties.provisioningState', 'type': 'str'},
     }
 
-    def __init__(self, *, prefix: str=None, prefix_validation_state=None, learned_type=None, **kwargs) -> None:
+    def __init__(self, *, prefix: str=None, **kwargs) -> None:
         super(PeeringServicePrefix, self).__init__(**kwargs)
         self.prefix = prefix
-        self.prefix_validation_state = prefix_validation_state
-        self.learned_type = learned_type
+        self.prefix_validation_state = None
+        self.learned_type = None
+        self.error_message = None
+        self.events = None
         self.provisioning_state = None
 
 
+class PeeringServicePrefixEvent(Model):
+    """The details of the event associated with a prefix.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar event_timestamp: The timestamp of the event associated with a
+     prefix.
+    :vartype event_timestamp: datetime
+    :ivar event_type: The type of the event associated with a prefix.
+    :vartype event_type: str
+    :ivar event_summary: The summary of the event associated with a prefix.
+    :vartype event_summary: str
+    :ivar event_level: The level of the event associated with a prefix.
+    :vartype event_level: str
+    :ivar event_description: The description of the event associated with a
+     prefix.
+    :vartype event_description: str
+    """
+
+    _validation = {
+        'event_timestamp': {'readonly': True},
+        'event_type': {'readonly': True},
+        'event_summary': {'readonly': True},
+        'event_level': {'readonly': True},
+        'event_description': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'event_timestamp': {'key': 'eventTimestamp', 'type': 'iso-8601'},
+        'event_type': {'key': 'eventType', 'type': 'str'},
+        'event_summary': {'key': 'eventSummary', 'type': 'str'},
+        'event_level': {'key': 'eventLevel', 'type': 'str'},
+        'event_description': {'key': 'eventDescription', 'type': 'str'},
+    }
+
+    def __init__(self, **kwargs) -> None:
+        super(PeeringServicePrefixEvent, self).__init__(**kwargs)
+        self.event_timestamp = None
+        self.event_type = None
+        self.event_summary = None
+        self.event_level = None
+        self.event_description = None
+
+
 class PeeringServiceProvider(Resource):
     """PeeringService provider.
 
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/models/_peering_management_client_enums.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/models/_peering_management_client_enums.py
index 37c0a42f2acb..2b757fd4427f 100644
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/models/_peering_management_client_enums.py
+++ b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/models/_peering_management_client_enums.py
@@ -126,11 +126,12 @@ class PrefixValidationState(str, Enum):
     verified = "Verified"
     failed = "Failed"
     pending = "Pending"
+    warning = "Warning"
     unknown = "Unknown"
 
 
 class LearnedType(str, Enum):
 
     none = "None"
-    via_partner = "ViaPartner"
+    via_service_provider = "ViaServiceProvider"
     via_session = "ViaSession"
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/__init__.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/__init__.py
index c5b265b97999..cdd15747d39d 100644
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/__init__.py
+++ b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/__init__.py
@@ -15,7 +15,6 @@
 from ._peering_locations_operations import PeeringLocationsOperations
 from ._peerings_operations import PeeringsOperations
 from ._peering_service_locations_operations import PeeringServiceLocationsOperations
-from ._peering_service_prefixes_operations import PeeringServicePrefixesOperations
 from ._prefixes_operations import PrefixesOperations
 from ._peering_service_providers_operations import PeeringServiceProvidersOperations
 from ._peering_services_operations import PeeringServicesOperations
@@ -28,7 +27,6 @@
     'PeeringLocationsOperations',
     'PeeringsOperations',
     'PeeringServiceLocationsOperations',
-    'PeeringServicePrefixesOperations',
     'PrefixesOperations',
     'PeeringServiceProvidersOperations',
     'PeeringServicesOperations',
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_legacy_peerings_operations.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_legacy_peerings_operations.py
index 2a60be96b3fc..131a2771c2c1 100644
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_legacy_peerings_operations.py
+++ b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_legacy_peerings_operations.py
@@ -24,7 +24,7 @@ class LegacyPeeringsOperations(object):
     :param config: Configuration of service client.
     :param serializer: An object model serializer.
     :param deserializer: An object model deserializer.
-    :ivar api_version: The client API version. Constant value: "2019-08-01-preview".
+    :ivar api_version: The client API version. Constant value: "2019-09-01-preview".
     """
 
     models = models
@@ -34,7 +34,7 @@ def __init__(self, client, config, serializer, deserializer):
         self._client = client
         self._serialize = serializer
         self._deserialize = deserializer
-        self.api_version = "2019-08-01-preview"
+        self.api_version = "2019-09-01-preview"
 
         self.config = config
 
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_operations.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_operations.py
index d94d1ea31dbc..3e049e50cc15 100644
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_operations.py
+++ b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_operations.py
@@ -24,7 +24,7 @@ class Operations(object):
     :param config: Configuration of service client.
     :param serializer: An object model serializer.
     :param deserializer: An object model deserializer.
-    :ivar api_version: The client API version. Constant value: "2019-08-01-preview".
+    :ivar api_version: The client API version. Constant value: "2019-09-01-preview".
     """
 
     models = models
@@ -34,7 +34,7 @@ def __init__(self, client, config, serializer, deserializer):
         self._client = client
         self._serialize = serializer
         self._deserialize = deserializer
-        self.api_version = "2019-08-01-preview"
+        self.api_version = "2019-09-01-preview"
 
         self.config = config
 
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peer_asns_operations.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peer_asns_operations.py
index 90f31ead3bf7..cb397734c859 100644
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peer_asns_operations.py
+++ b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peer_asns_operations.py
@@ -24,7 +24,7 @@ class PeerAsnsOperations(object):
     :param config: Configuration of service client.
     :param serializer: An object model serializer.
     :param deserializer: An object model deserializer.
-    :ivar api_version: The client API version. Constant value: "2019-08-01-preview".
+    :ivar api_version: The client API version. Constant value: "2019-09-01-preview".
     """
 
     models = models
@@ -34,7 +34,7 @@ def __init__(self, client, config, serializer, deserializer):
         self._client = client
         self._serialize = serializer
         self._deserialize = deserializer
-        self.api_version = "2019-08-01-preview"
+        self.api_version = "2019-09-01-preview"
 
         self.config = config
 
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_locations_operations.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_locations_operations.py
index 6935adb7da8f..6cf7c67dd8ee 100644
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_locations_operations.py
+++ b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_locations_operations.py
@@ -24,7 +24,7 @@ class PeeringLocationsOperations(object):
     :param config: Configuration of service client.
     :param serializer: An object model serializer.
     :param deserializer: An object model deserializer.
-    :ivar api_version: The client API version. Constant value: "2019-08-01-preview".
+    :ivar api_version: The client API version. Constant value: "2019-09-01-preview".
     """
 
     models = models
@@ -34,7 +34,7 @@ def __init__(self, client, config, serializer, deserializer):
         self._client = client
         self._serialize = serializer
         self._deserialize = deserializer
-        self.api_version = "2019-08-01-preview"
+        self.api_version = "2019-09-01-preview"
 
         self.config = config
 
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_service_locations_operations.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_service_locations_operations.py
index d5fcb77a4189..cdf508d203c0 100644
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_service_locations_operations.py
+++ b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_service_locations_operations.py
@@ -24,7 +24,7 @@ class PeeringServiceLocationsOperations(object):
     :param config: Configuration of service client.
     :param serializer: An object model serializer.
     :param deserializer: An object model deserializer.
-    :ivar api_version: The client API version. Constant value: "2019-08-01-preview".
+    :ivar api_version: The client API version. Constant value: "2019-09-01-preview".
     """
 
     models = models
@@ -34,7 +34,7 @@ def __init__(self, client, config, serializer, deserializer):
         self._client = client
         self._serialize = serializer
         self._deserialize = deserializer
-        self.api_version = "2019-08-01-preview"
+        self.api_version = "2019-09-01-preview"
 
         self.config = config
 
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_service_prefixes_operations.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_service_prefixes_operations.py
deleted file mode 100644
index 979613cd9dc5..000000000000
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_service_prefixes_operations.py
+++ /dev/null
@@ -1,229 +0,0 @@
-# coding=utf-8
-# --------------------------------------------------------------------------
-# Copyright (c) Microsoft Corporation. All rights reserved.
-# Licensed under the MIT License. See License.txt in the project root for
-# license information.
-#
-# Code generated by Microsoft (R) AutoRest Code Generator.
-# Changes may cause incorrect behavior and will be lost if the code is
-# regenerated.
-# --------------------------------------------------------------------------
-
-import uuid
-from msrest.pipeline import ClientRawResponse
-
-from .. import models
-
-
-class PeeringServicePrefixesOperations(object):
-    """PeeringServicePrefixesOperations operations.
-
-    You should not instantiate directly this class, but create a Client instance that will create it for you and attach it as attribute.
-
-    :param client: Client for service requests.
-    :param config: Configuration of service client.
-    :param serializer: An object model serializer.
-    :param deserializer: An object model deserializer.
-    :ivar api_version: The client API version. Constant value: "2019-08-01-preview".
-    """
-
-    models = models
-
-    def __init__(self, client, config, serializer, deserializer):
-
-        self._client = client
-        self._serialize = serializer
-        self._deserialize = deserializer
-        self.api_version = "2019-08-01-preview"
-
-        self.config = config
-
-    def get(
-            self, resource_group_name, peering_service_name, prefix_name, custom_headers=None, raw=False, **operation_config):
-        """Gets the peering service prefix.
-
-        :param resource_group_name: The resource group name.
-        :type resource_group_name: str
-        :param peering_service_name: The peering service name.
-        :type peering_service_name: str
-        :param prefix_name: The prefix name.
-        :type prefix_name: str
-        :param dict custom_headers: headers that will be added to the request
-        :param bool raw: returns the direct response alongside the
-         deserialized response
-        :param operation_config: :ref:`Operation configuration
-         overrides<msrest:optionsforoperations>`.
-        :return: PeeringServicePrefix or ClientRawResponse if raw=true
-        :rtype: ~azure.mgmt.peering.models.PeeringServicePrefix or
-         ~msrest.pipeline.ClientRawResponse
-        :raises:
-         :class:`ErrorResponseException<azure.mgmt.peering.models.ErrorResponseException>`
-        """
-        # Construct URL
-        url = self.get.metadata['url']
-        path_format_arguments = {
-            'resourceGroupName': self._serialize.url("resource_group_name", resource_group_name, 'str'),
-            'peeringServiceName': self._serialize.url("peering_service_name", peering_service_name, 'str'),
-            'prefixName': self._serialize.url("prefix_name", prefix_name, 'str'),
-            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
-        }
-        url = self._client.format_url(url, **path_format_arguments)
-
-        # Construct parameters
-        query_parameters = {}
-        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
-
-        # Construct headers
-        header_parameters = {}
-        header_parameters['Accept'] = 'application/json'
-        if self.config.generate_client_request_id:
-            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
-        if custom_headers:
-            header_parameters.update(custom_headers)
-        if self.config.accept_language is not None:
-            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
-
-        # Construct and send request
-        request = self._client.get(url, query_parameters, header_parameters)
-        response = self._client.send(request, stream=False, **operation_config)
-
-        if response.status_code not in [200]:
-            raise models.ErrorResponseException(self._deserialize, response)
-
-        deserialized = None
-        if response.status_code == 200:
-            deserialized = self._deserialize('PeeringServicePrefix', response)
-
-        if raw:
-            client_raw_response = ClientRawResponse(deserialized, response)
-            return client_raw_response
-
-        return deserialized
-    get.metadata = {'url': '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Peering/peeringServices/{peeringServiceName}/prefixes/{prefixName}'}
-
-    def create_or_update(
-            self, resource_group_name, peering_service_name, prefix_name, peering_service_prefix, custom_headers=None, raw=False, **operation_config):
-        """Creates or updates the peering prefix.
-
-        :param resource_group_name: The resource group name.
-        :type resource_group_name: str
-        :param peering_service_name: The peering service name.
-        :type peering_service_name: str
-        :param prefix_name: The prefix name
-        :type prefix_name: str
-        :param peering_service_prefix: The IP prefix for an peering
-        :type peering_service_prefix:
-         ~azure.mgmt.peering.models.PeeringServicePrefix
-        :param dict custom_headers: headers that will be added to the request
-        :param bool raw: returns the direct response alongside the
-         deserialized response
-        :param operation_config: :ref:`Operation configuration
-         overrides<msrest:optionsforoperations>`.
-        :return: PeeringServicePrefix or ClientRawResponse if raw=true
-        :rtype: ~azure.mgmt.peering.models.PeeringServicePrefix or
-         ~msrest.pipeline.ClientRawResponse
-        :raises:
-         :class:`ErrorResponseException<azure.mgmt.peering.models.ErrorResponseException>`
-        """
-        # Construct URL
-        url = self.create_or_update.metadata['url']
-        path_format_arguments = {
-            'resourceGroupName': self._serialize.url("resource_group_name", resource_group_name, 'str'),
-            'peeringServiceName': self._serialize.url("peering_service_name", peering_service_name, 'str'),
-            'prefixName': self._serialize.url("prefix_name", prefix_name, 'str'),
-            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
-        }
-        url = self._client.format_url(url, **path_format_arguments)
-
-        # Construct parameters
-        query_parameters = {}
-        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
-
-        # Construct headers
-        header_parameters = {}
-        header_parameters['Accept'] = 'application/json'
-        header_parameters['Content-Type'] = 'application/json; charset=utf-8'
-        if self.config.generate_client_request_id:
-            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
-        if custom_headers:
-            header_parameters.update(custom_headers)
-        if self.config.accept_language is not None:
-            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
-
-        # Construct body
-        body_content = self._serialize.body(peering_service_prefix, 'PeeringServicePrefix')
-
-        # Construct and send request
-        request = self._client.put(url, query_parameters, header_parameters, body_content)
-        response = self._client.send(request, stream=False, **operation_config)
-
-        if response.status_code not in [200, 201]:
-            raise models.ErrorResponseException(self._deserialize, response)
-
-        deserialized = None
-        if response.status_code == 200:
-            deserialized = self._deserialize('PeeringServicePrefix', response)
-        if response.status_code == 201:
-            deserialized = self._deserialize('PeeringServicePrefix', response)
-
-        if raw:
-            client_raw_response = ClientRawResponse(deserialized, response)
-            return client_raw_response
-
-        return deserialized
-    create_or_update.metadata = {'url': '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Peering/peeringServices/{peeringServiceName}/prefixes/{prefixName}'}
-
-    def delete(
-            self, resource_group_name, peering_service_name, prefix_name, custom_headers=None, raw=False, **operation_config):
-        """removes the peering prefix.
-
-        :param resource_group_name: The resource group name.
-        :type resource_group_name: str
-        :param peering_service_name: The peering service name.
-        :type peering_service_name: str
-        :param prefix_name: The prefix name
-        :type prefix_name: str
-        :param dict custom_headers: headers that will be added to the request
-        :param bool raw: returns the direct response alongside the
-         deserialized response
-        :param operation_config: :ref:`Operation configuration
-         overrides<msrest:optionsforoperations>`.
-        :return: None or ClientRawResponse if raw=true
-        :rtype: None or ~msrest.pipeline.ClientRawResponse
-        :raises:
-         :class:`ErrorResponseException<azure.mgmt.peering.models.ErrorResponseException>`
-        """
-        # Construct URL
-        url = self.delete.metadata['url']
-        path_format_arguments = {
-            'resourceGroupName': self._serialize.url("resource_group_name", resource_group_name, 'str'),
-            'peeringServiceName': self._serialize.url("peering_service_name", peering_service_name, 'str'),
-            'prefixName': self._serialize.url("prefix_name", prefix_name, 'str'),
-            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
-        }
-        url = self._client.format_url(url, **path_format_arguments)
-
-        # Construct parameters
-        query_parameters = {}
-        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
-
-        # Construct headers
-        header_parameters = {}
-        if self.config.generate_client_request_id:
-            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
-        if custom_headers:
-            header_parameters.update(custom_headers)
-        if self.config.accept_language is not None:
-            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
-
-        # Construct and send request
-        request = self._client.delete(url, query_parameters, header_parameters)
-        response = self._client.send(request, stream=False, **operation_config)
-
-        if response.status_code not in [200, 204]:
-            raise models.ErrorResponseException(self._deserialize, response)
-
-        if raw:
-            client_raw_response = ClientRawResponse(None, response)
-            return client_raw_response
-    delete.metadata = {'url': '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Peering/peeringServices/{peeringServiceName}/prefixes/{prefixName}'}
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_service_providers_operations.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_service_providers_operations.py
index 18197e1202f8..4aba0deb4a86 100644
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_service_providers_operations.py
+++ b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_service_providers_operations.py
@@ -24,7 +24,7 @@ class PeeringServiceProvidersOperations(object):
     :param config: Configuration of service client.
     :param serializer: An object model serializer.
     :param deserializer: An object model deserializer.
-    :ivar api_version: The client API version. Constant value: "2019-08-01-preview".
+    :ivar api_version: The client API version. Constant value: "2019-09-01-preview".
     """
 
     models = models
@@ -34,7 +34,7 @@ def __init__(self, client, config, serializer, deserializer):
         self._client = client
         self._serialize = serializer
         self._deserialize = deserializer
-        self.api_version = "2019-08-01-preview"
+        self.api_version = "2019-09-01-preview"
 
         self.config = config
 
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_services_operations.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_services_operations.py
index 7c5c7837466d..ecac472f7b58 100644
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_services_operations.py
+++ b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peering_services_operations.py
@@ -24,7 +24,7 @@ class PeeringServicesOperations(object):
     :param config: Configuration of service client.
     :param serializer: An object model serializer.
     :param deserializer: An object model deserializer.
-    :ivar api_version: The client API version. Constant value: "2019-08-01-preview".
+    :ivar api_version: The client API version. Constant value: "2019-09-01-preview".
     """
 
     models = models
@@ -34,7 +34,7 @@ def __init__(self, client, config, serializer, deserializer):
         self._client = client
         self._serialize = serializer
         self._deserialize = deserializer
-        self.api_version = "2019-08-01-preview"
+        self.api_version = "2019-09-01-preview"
 
         self.config = config
 
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peerings_operations.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peerings_operations.py
index f8b79147bc57..40da1c496759 100644
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peerings_operations.py
+++ b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_peerings_operations.py
@@ -24,7 +24,7 @@ class PeeringsOperations(object):
     :param config: Configuration of service client.
     :param serializer: An object model serializer.
     :param deserializer: An object model deserializer.
-    :ivar api_version: The client API version. Constant value: "2019-08-01-preview".
+    :ivar api_version: The client API version. Constant value: "2019-09-01-preview".
     """
 
     models = models
@@ -34,7 +34,7 @@ def __init__(self, client, config, serializer, deserializer):
         self._client = client
         self._serialize = serializer
         self._deserialize = deserializer
-        self.api_version = "2019-08-01-preview"
+        self.api_version = "2019-09-01-preview"
 
         self.config = config
 
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_prefixes_operations.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_prefixes_operations.py
index 08b618b2518e..3b94252cdd96 100644
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_prefixes_operations.py
+++ b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/operations/_prefixes_operations.py
@@ -24,7 +24,7 @@ class PrefixesOperations(object):
     :param config: Configuration of service client.
     :param serializer: An object model serializer.
     :param deserializer: An object model deserializer.
-    :ivar api_version: The client API version. Constant value: "2019-08-01-preview".
+    :ivar api_version: The client API version. Constant value: "2019-09-01-preview".
     """
 
     models = models
@@ -34,18 +34,219 @@ def __init__(self, client, config, serializer, deserializer):
         self._client = client
         self._serialize = serializer
         self._deserialize = deserializer
-        self.api_version = "2019-08-01-preview"
+        self.api_version = "2019-09-01-preview"
 
         self.config = config
 
+    def get(
+            self, resource_group_name, peering_service_name, prefix_name, expand=None, custom_headers=None, raw=False, **operation_config):
+        """Gets an existing prefix with the specified name under the given
+        subscription, resource group and peering service.
+
+        :param resource_group_name: The name of the resource group.
+        :type resource_group_name: str
+        :param peering_service_name: The name of the peering service.
+        :type peering_service_name: str
+        :param prefix_name: The name of the prefix.
+        :type prefix_name: str
+        :param expand: The properties to be expanded.
+        :type expand: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: PeeringServicePrefix or ClientRawResponse if raw=true
+        :rtype: ~azure.mgmt.peering.models.PeeringServicePrefix or
+         ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorResponseException<azure.mgmt.peering.models.ErrorResponseException>`
+        """
+        # Construct URL
+        url = self.get.metadata['url']
+        path_format_arguments = {
+            'resourceGroupName': self._serialize.url("resource_group_name", resource_group_name, 'str'),
+            'peeringServiceName': self._serialize.url("peering_service_name", peering_service_name, 'str'),
+            'prefixName': self._serialize.url("prefix_name", prefix_name, 'str'),
+            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        if expand is not None:
+            query_parameters['$expand'] = self._serialize.query("expand", expand, 'str')
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        header_parameters['Accept'] = 'application/json'
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct and send request
+        request = self._client.get(url, query_parameters, header_parameters)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [200]:
+            raise models.ErrorResponseException(self._deserialize, response)
+
+        deserialized = None
+        if response.status_code == 200:
+            deserialized = self._deserialize('PeeringServicePrefix', response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(deserialized, response)
+            return client_raw_response
+
+        return deserialized
+    get.metadata = {'url': '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Peering/peeringServices/{peeringServiceName}/prefixes/{prefixName}'}
+
+    def create_or_update(
+            self, resource_group_name, peering_service_name, prefix_name, prefix=None, custom_headers=None, raw=False, **operation_config):
+        """Creates a new prefix with the specified name under the given
+        subscription, resource group and peering service.
+
+        :param resource_group_name: The name of the resource group.
+        :type resource_group_name: str
+        :param peering_service_name: The name of the peering service.
+        :type peering_service_name: str
+        :param prefix_name: The name of the prefix.
+        :type prefix_name: str
+        :param prefix: The prefix from which your traffic originates.
+        :type prefix: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: PeeringServicePrefix or ClientRawResponse if raw=true
+        :rtype: ~azure.mgmt.peering.models.PeeringServicePrefix or
+         ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorResponseException<azure.mgmt.peering.models.ErrorResponseException>`
+        """
+        peering_service_prefix = models.PeeringServicePrefix(prefix=prefix)
+
+        # Construct URL
+        url = self.create_or_update.metadata['url']
+        path_format_arguments = {
+            'resourceGroupName': self._serialize.url("resource_group_name", resource_group_name, 'str'),
+            'peeringServiceName': self._serialize.url("peering_service_name", peering_service_name, 'str'),
+            'prefixName': self._serialize.url("prefix_name", prefix_name, 'str'),
+            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        header_parameters['Accept'] = 'application/json'
+        header_parameters['Content-Type'] = 'application/json; charset=utf-8'
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct body
+        body_content = self._serialize.body(peering_service_prefix, 'PeeringServicePrefix')
+
+        # Construct and send request
+        request = self._client.put(url, query_parameters, header_parameters, body_content)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [200, 201]:
+            raise models.ErrorResponseException(self._deserialize, response)
+
+        deserialized = None
+        if response.status_code == 200:
+            deserialized = self._deserialize('PeeringServicePrefix', response)
+        if response.status_code == 201:
+            deserialized = self._deserialize('PeeringServicePrefix', response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(deserialized, response)
+            return client_raw_response
+
+        return deserialized
+    create_or_update.metadata = {'url': '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Peering/peeringServices/{peeringServiceName}/prefixes/{prefixName}'}
+
+    def delete(
+            self, resource_group_name, peering_service_name, prefix_name, custom_headers=None, raw=False, **operation_config):
+        """Deletes an existing prefix with the specified name under the given
+        subscription, resource group and peering service.
+
+        :param resource_group_name: The name of the resource group.
+        :type resource_group_name: str
+        :param peering_service_name: The name of the peering service.
+        :type peering_service_name: str
+        :param prefix_name: The name of the prefix.
+        :type prefix_name: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: None or ClientRawResponse if raw=true
+        :rtype: None or ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorResponseException<azure.mgmt.peering.models.ErrorResponseException>`
+        """
+        # Construct URL
+        url = self.delete.metadata['url']
+        path_format_arguments = {
+            'resourceGroupName': self._serialize.url("resource_group_name", resource_group_name, 'str'),
+            'peeringServiceName': self._serialize.url("peering_service_name", peering_service_name, 'str'),
+            'prefixName': self._serialize.url("prefix_name", prefix_name, 'str'),
+            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct and send request
+        request = self._client.delete(url, query_parameters, header_parameters)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [200, 204]:
+            raise models.ErrorResponseException(self._deserialize, response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(None, response)
+            return client_raw_response
+    delete.metadata = {'url': '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Peering/peeringServices/{peeringServiceName}/prefixes/{prefixName}'}
+
     def list_by_peering_service(
-            self, resource_group_name, peering_service_name, custom_headers=None, raw=False, **operation_config):
-        """Lists the peerings prefix in the resource group.
+            self, resource_group_name, peering_service_name, expand=None, custom_headers=None, raw=False, **operation_config):
+        """Lists all prefixes under the given subscription, resource group and
+        peering service.
 
-        :param resource_group_name: The resource group name.
+        :param resource_group_name: The name of the resource group.
         :type resource_group_name: str
-        :param peering_service_name: The peering service name.
+        :param peering_service_name: The name of the peering service.
         :type peering_service_name: str
+        :param expand: The properties to be expanded.
+        :type expand: str
         :param dict custom_headers: headers that will be added to the request
         :param bool raw: returns the direct response alongside the
          deserialized response
@@ -70,6 +271,8 @@ def prepare_request(next_link=None):
 
                 # Construct parameters
                 query_parameters = {}
+                if expand is not None:
+                    query_parameters['$expand'] = self._serialize.query("expand", expand, 'str')
                 query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
 
             else:
diff --git a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/version.py b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/version.py
index 0529c1b3b0f0..ad4aa9eb3df5 100644
--- a/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/version.py
+++ b/sdk/peering/azure-mgmt-peering/azure/mgmt/peering/version.py
@@ -9,5 +9,5 @@
 # regenerated.
 # --------------------------------------------------------------------------
 
-VERSION = "0.1.0rc1"
+VERSION = "0.1.0rc2"
 
diff --git a/sdk/peering/azure-mgmt-peering/tests/recordings/test_mgmt_peering.test_peering.yaml b/sdk/peering/azure-mgmt-peering/tests/recordings/test_mgmt_peering.test_peering.yaml
new file mode 100644
index 000000000000..90ba1891bb3d
--- /dev/null
+++ b/sdk/peering/azure-mgmt-peering/tests/recordings/test_mgmt_peering.test_peering.yaml
@@ -0,0 +1,183 @@
+interactions:
+- request:
+    body: '{"properties": {"peeringServiceLocation": "California", "peeringServiceProvider":
+      "Kordia Limited"}, "location": "westus"}'
+    headers:
+      Accept:
+      - application/json
+      Accept-Encoding:
+      - gzip, deflate
+      Connection:
+      - keep-alive
+      Content-Length:
+      - '122'
+      Content-Type:
+      - application/json; charset=utf-8
+      User-Agent:
+      - python/3.6.8 (Linux-4.9.184-linuxkit-x86_64-with-Ubuntu-18.04-bionic) msrest/0.6.8
+        msrest_azure/0.4.34 azure-mgmt-peering/0.1.0rc1 Azure-SDK-For-Python
+      accept-language:
+      - en-US
+    method: PUT
+    uri: https://management.azure.com/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test_mgmt_peering_test_peeringc05b0c55/providers/Microsoft.Peering/peeringServices/MyPeerServiceName?api-version=2019-09-01-preview
+  response:
+    body:
+      string: "{\r\n  \"properties\": {\r\n    \"peeringServiceLocation\": \"California\"\
+        ,\r\n    \"peeringServiceProvider\": \"Kordia Limited\",\r\n    \"provisioningState\"\
+        : \"Succeeded\"\r\n  },\r\n  \"location\": \"westus\",\r\n  \"eTag\": \"e242c145-decb-4c6f-be6d-ddd1909a69e4\"\
+        ,\r\n  \"name\": \"MyPeerServiceName\",\r\n  \"id\": \"/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test_mgmt_peering_test_peeringc05b0c55/providers/Microsoft.Peering/peeringServices/MyPeerServiceName\"\
+        ,\r\n  \"type\": \"Microsoft.Peering/peeringServices\"\r\n}"
+    headers:
+      cache-control:
+      - no-cache
+      content-length:
+      - '496'
+      content-type:
+      - application/json; charset=utf-8
+      date:
+      - Thu, 24 Oct 2019 04:21:06 GMT
+      expires:
+      - '-1'
+      pragma:
+      - no-cache
+      strict-transport-security:
+      - max-age=31536000; includeSubDomains
+      x-content-type-options:
+      - nosniff
+      x-ms-ratelimit-remaining-subscription-resource-requests:
+      - '99'
+    status:
+      code: 201
+      message: Created
+- request:
+    body: '{"properties": {"prefix": "192.168.1.0/24"}}'
+    headers:
+      Accept:
+      - application/json
+      Accept-Encoding:
+      - gzip, deflate
+      Connection:
+      - keep-alive
+      Content-Length:
+      - '44'
+      Content-Type:
+      - application/json; charset=utf-8
+      User-Agent:
+      - python/3.6.8 (Linux-4.9.184-linuxkit-x86_64-with-Ubuntu-18.04-bionic) msrest/0.6.8
+        msrest_azure/0.4.34 azure-mgmt-peering/0.1.0rc1 Azure-SDK-For-Python
+      accept-language:
+      - en-US
+    method: PUT
+    uri: https://management.azure.com/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test_mgmt_peering_test_peeringc05b0c55/providers/Microsoft.Peering/peeringServices/MyPeerServiceName/prefixes/MyPeerPrefix?api-version=2019-09-01-preview
+  response:
+    body:
+      string: "{\r\n  \"properties\": {\r\n    \"prefix\": \"192.168.1.0/24\",\r\n\
+        \    \"prefixValidationState\": \"Pending\",\r\n    \"learnedType\": \"None\"\
+        ,\r\n    \"provisioningState\": \"Succeeded\"\r\n  },\r\n  \"name\": \"MyPeerPrefix\"\
+        ,\r\n  \"id\": \"/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test_mgmt_peering_test_peeringc05b0c55/providers/Microsoft.Peering/peeringServices/MyPeerServiceName/prefixes/MyPeerPrefix\"\
+        ,\r\n  \"type\": \"Microsoft.Peering/peeringServices/prefixes\"\r\n}"
+    headers:
+      cache-control:
+      - no-cache
+      content-length:
+      - '454'
+      content-type:
+      - application/json; charset=utf-8
+      date:
+      - Thu, 24 Oct 2019 04:21:07 GMT
+      expires:
+      - '-1'
+      pragma:
+      - no-cache
+      strict-transport-security:
+      - max-age=31536000; includeSubDomains
+      x-content-type-options:
+      - nosniff
+      x-ms-ratelimit-remaining-subscription-writes:
+      - '1199'
+    status:
+      code: 201
+      message: Created
+- request:
+    body: null
+    headers:
+      Accept:
+      - application/json
+      Accept-Encoding:
+      - gzip, deflate
+      Connection:
+      - keep-alive
+      Content-Length:
+      - '0'
+      User-Agent:
+      - python/3.6.8 (Linux-4.9.184-linuxkit-x86_64-with-Ubuntu-18.04-bionic) msrest/0.6.8
+        msrest_azure/0.4.34 azure-mgmt-peering/0.1.0rc1 Azure-SDK-For-Python
+      accept-language:
+      - en-US
+    method: DELETE
+    uri: https://management.azure.com/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test_mgmt_peering_test_peeringc05b0c55/providers/Microsoft.Peering/peeringServices/MyPeerServiceName/prefixes/MyPeerPrefix?api-version=2019-09-01-preview
+  response:
+    body:
+      string: ''
+    headers:
+      cache-control:
+      - no-cache
+      content-length:
+      - '0'
+      date:
+      - Thu, 24 Oct 2019 04:21:07 GMT
+      expires:
+      - '-1'
+      pragma:
+      - no-cache
+      strict-transport-security:
+      - max-age=31536000; includeSubDomains
+      x-content-type-options:
+      - nosniff
+      x-ms-ratelimit-remaining-subscription-deletes:
+      - '14999'
+    status:
+      code: 200
+      message: OK
+- request:
+    body: null
+    headers:
+      Accept:
+      - application/json
+      Accept-Encoding:
+      - gzip, deflate
+      Connection:
+      - keep-alive
+      Content-Length:
+      - '0'
+      User-Agent:
+      - python/3.6.8 (Linux-4.9.184-linuxkit-x86_64-with-Ubuntu-18.04-bionic) msrest/0.6.8
+        msrest_azure/0.4.34 azure-mgmt-peering/0.1.0rc1 Azure-SDK-For-Python
+      accept-language:
+      - en-US
+    method: DELETE
+    uri: https://management.azure.com/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test_mgmt_peering_test_peeringc05b0c55/providers/Microsoft.Peering/peeringServices/MyPeerServiceName?api-version=2019-09-01-preview
+  response:
+    body:
+      string: ''
+    headers:
+      cache-control:
+      - no-cache
+      content-length:
+      - '0'
+      date:
+      - Thu, 24 Oct 2019 04:21:08 GMT
+      expires:
+      - '-1'
+      pragma:
+      - no-cache
+      strict-transport-security:
+      - max-age=31536000; includeSubDomains
+      x-content-type-options:
+      - nosniff
+      x-ms-ratelimit-remaining-subscription-deletes:
+      - '14998'
+    status:
+      code: 200
+      message: OK
+version: 1
diff --git a/sdk/peering/azure-mgmt-peering/tests/test_mgmt_peering.py b/sdk/peering/azure-mgmt-peering/tests/test_mgmt_peering.py
new file mode 100644
index 000000000000..af3c9cad404e
--- /dev/null
+++ b/sdk/peering/azure-mgmt-peering/tests/test_mgmt_peering.py
@@ -0,0 +1,54 @@
+# coding: utf-8
+
+#-------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#--------------------------------------------------------------------------
+
+import unittest
+
+import azure.mgmt.peering
+from devtools_testutils import AzureMgmtTestCase, ResourceGroupPreparer
+
+AZURE_LOCATION = 'westus'
+
+class MgmtPeeringTest(AzureMgmtTestCase):
+
+    def setUp(self):
+        super(MgmtPeeringTest, self).setUp()
+        self.mgmt_client = self.create_mgmt_client(
+            azure.mgmt.peering.PeeringManagementClient
+        )
+    
+    @ResourceGroupPreparer(location=AZURE_LOCATION)
+    def test_peering(self, resource_group):
+
+        PEERING_SERVICE_NAME = "MyPeerServiceName"
+        PREFIX_NAME = "MyPeerPrefix"
+        PREFIX_VALUE = "192.168.1.0/24"
+
+        BODY = {
+          "properties": {
+            "peeringServiceLocation": "California",
+            "peeringServiceProvider": "Kordia Limited"
+          },
+          "location": "westus"
+        }
+        azure_operation_poller = self.mgmt_client.peering_services.create_or_update(resource_group.name, PEERING_SERVICE_NAME, BODY)
+        self.assertEqual(azure_operation_poller.name, PEERING_SERVICE_NAME)
+        self.assertEqual(azure_operation_poller.provisioning_state, "Succeeded")
+        
+        azure_operation_poller = self.mgmt_client.prefixes.create_or_update(resource_group.name, PEERING_SERVICE_NAME, PREFIX_NAME, prefix=PREFIX_VALUE)
+        self.assertEqual(azure_operation_poller.prefix, PREFIX_VALUE)
+        self.assertEqual(azure_operation_poller.provisioning_state, "Succeeded")
+
+        azure_operation_poller = self.mgmt_client.prefixes.delete(resource_group.name, PEERING_SERVICE_NAME, PREFIX_NAME, prefix=PREFIX_VALUE)
+
+        BODY = {}
+        azure_operation_poller = self.mgmt_client.peering_services.delete(resource_group.name, PEERING_SERVICE_NAME, BODY)
+
+
+#------------------------------------------------------------------------------
+if __name__ == '__main__':
+    unittest.main()