[Network]az network express-route peering create: Support ipv6 address

src/azure-cli/azure/cli/command_modules/network/_help.py

@@ -2782,6 +2782,11 @@
             --peering-type MicrosoftPeering --peer-asn 10002 --vlan-id 103 \\
             --primary-peer-subnet 101.0.0.0/30 --secondary-peer-subnet 102.0.0.0/30 \\
             --advertised-public-prefixes 101.0.0.0/30
+  - name: Create Microsoft Peering settings with IPv6 configuration.
+    text: |
+        az network express-route peering create -g MyResourceGroup --circuit-name MyCircuit \\
+            --peering-type AzurePrivatePeering --peer-asn 10002 --vlan-id 103 --ip-version ipv6\\
+            --primary-peer-subnet 2002:db00::/126 --secondary-peer-subnet 2003:db00::/126
   - name: Create peering settings for an ExpressRoute circuit. (autogenerated)
     text: |
         az network express-route peering create --circuit-name MyCircuit --peer-asn 10002 --peering-type AzurePublicPeering --primary-peer-subnet 101.0.0.0/30 --resource-group MyResourceGroup --secondary-peer-subnet 102.0.0.0/30 --shared-key Abc123 --vlan-id 103

src/azure-cli/azure/cli/command_modules/network/_params.py

@@ -747,8 +747,8 @@ def load_arguments(self, _):
         c.argument('peering_type', validator=validate_peering_type, arg_type=get_enum_type(ExpressRoutePeeringType), help='BGP peering type for the circuit.')
         c.argument('sku_family', arg_type=get_enum_type(ExpressRouteCircuitSkuFamily))
         c.argument('sku_tier', arg_type=get_enum_type(ExpressRouteCircuitSkuTier))
-        c.argument('primary_peer_address_prefix', options_list=['--primary-peer-subnet'], help='/30 subnet used to configure IP addresses for primary interface.')
-        c.argument('secondary_peer_address_prefix', options_list=['--secondary-peer-subnet'], help='/30 subnet used to configure IP addresses for secondary interface.')
+        c.argument('primary_peer_address_prefix', options_list=['--primary-peer-subnet'], help='/30(ipv4) or /126(ipv6) subnet used to configure IP addresses for primary interface.')
+        c.argument('secondary_peer_address_prefix', options_list=['--secondary-peer-subnet'], help='/30(ipv4) or /126(ipv6) subnet used to configure IP addresses for secondary interface.')
         c.argument('shared_key', help='Key for generating an MD5 for the BGP session.')
 
     with self.argument_context('network express-route peering', arg_group='Microsoft Peering') as c:

src/azure-cli/azure/cli/command_modules/network/custom.py

@@ -2632,7 +2632,7 @@ def create_express_route_peering(
         cmd, client, resource_group_name, circuit_name, peering_type, peer_asn, vlan_id,
         primary_peer_address_prefix, secondary_peer_address_prefix, shared_key=None,
         advertised_public_prefixes=None, customer_asn=None, routing_registry_name=None,
-        route_filter=None, legacy_mode=None):
+        route_filter=None, legacy_mode=None, ip_version='IPv4'):
     (ExpressRouteCircuitPeering, ExpressRouteCircuitPeeringConfig, RouteFilter) = \
         cmd.get_models('ExpressRouteCircuitPeering', 'ExpressRouteCircuitPeeringConfig', 'RouteFilter')
 
@@ -2641,21 +2641,37 @@ def create_express_route_peering(
     else:
         ExpressRoutePeeringType = cmd.get_models('ExpressRouteCircuitPeeringType')
 
-    peering = ExpressRouteCircuitPeering(
-        peering_type=peering_type, peer_asn=peer_asn, vlan_id=vlan_id,
-        primary_peer_address_prefix=primary_peer_address_prefix,
-        secondary_peer_address_prefix=secondary_peer_address_prefix,
-        shared_key=shared_key)
-
-    if peering_type == ExpressRoutePeeringType.microsoft_peering.value:
-        peering.microsoft_peering_config = ExpressRouteCircuitPeeringConfig(
-            advertised_public_prefixes=advertised_public_prefixes,
-            customer_asn=customer_asn,
-            routing_registry_name=routing_registry_name)
-    if cmd.supported_api_version(min_api='2016-12-01') and route_filter:
-        peering.route_filter = RouteFilter(id=route_filter)
-    if cmd.supported_api_version(min_api='2017-10-01') and legacy_mode is not None:
-        peering.microsoft_peering_config.legacy_mode = legacy_mode
+    if ip_version == 'IPv6' and cmd.supported_api_version(min_api='2020-08-01'):
+        Ipv6ExpressRouteCircuitPeeringConfig = cmd.get_models('Ipv6ExpressRouteCircuitPeeringConfig')
+        if peering_type == ExpressRoutePeeringType.microsoft_peering.value:
+            microsoft_config = ExpressRouteCircuitPeeringConfig(advertised_public_prefixes=advertised_public_prefixes,
+                                                                customer_asn=customer_asn,
+                                                                routing_registry_name=routing_registry_name)
+        else:
+            microsoft_config = None
+        ipv6 = Ipv6ExpressRouteCircuitPeeringConfig(primary_peer_address_prefix=primary_peer_address_prefix,
+                                                    secondary_peer_address_prefix=secondary_peer_address_prefix,
+                                                    microsoft_peering_config=microsoft_config,
+                                                    route_filter=route_filter)
+        peering = ExpressRouteCircuitPeering(peering_type=peering_type, ipv6_peering_config=ipv6, peer_asn=peer_asn,
+                                             vlan_id=vlan_id)
+
+    else:
+        peering = ExpressRouteCircuitPeering(
+            peering_type=peering_type, peer_asn=peer_asn, vlan_id=vlan_id,
+            primary_peer_address_prefix=primary_peer_address_prefix,
+            secondary_peer_address_prefix=secondary_peer_address_prefix,
+            shared_key=shared_key)
+
+        if peering_type == ExpressRoutePeeringType.microsoft_peering.value:
+            peering.microsoft_peering_config = ExpressRouteCircuitPeeringConfig(
+                advertised_public_prefixes=advertised_public_prefixes,
+                customer_asn=customer_asn,
+                routing_registry_name=routing_registry_name)
+        if cmd.supported_api_version(min_api='2016-12-01') and route_filter:
+            peering.route_filter = RouteFilter(id=route_filter)
+        if cmd.supported_api_version(min_api='2017-10-01') and legacy_mode is not None:
+            peering.microsoft_peering_config.legacy_mode = legacy_mode
 
     return client.begin_create_or_update(resource_group_name, circuit_name, peering_type, peering)