diff --git a/test/integration/component/test_multiple_subnets_in_isolated_network.py b/test/integration/component/test_multiple_subnets_in_isolated_network.py
index df0171c2330..9cbd3bb2fba 100644
--- a/test/integration/component/test_multiple_subnets_in_isolated_network.py
+++ b/test/integration/component/test_multiple_subnets_in_isolated_network.py
@@ -308,6 +308,21 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
         # 17. release new ip 4
         #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,"
         #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth3 -> new ip 3, eth4 -> new ip 6
+        # 18. release new ip 3
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth4,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth4 -> new ip 6
+        # 19. restart network
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth4,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth4 -> new ip 6
+        # 20. reboot router
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth3 -> new ip 6
+        # 21. restart network with cleanup
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth3 -> new ip 6
+        # 22. restart network with cleanup, makeredundant=true
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth3 -> new ip 6
         """
 
         # Create new domain1
@@ -719,6 +734,8 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_router_publicnic_state(router, host, "eth2|eth4")
 
         # 19. restart network
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth4,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth4 -> new ip 6
         self.network1.restart(self.apiclient)
         routers = self.get_routers(self.network1.id)
         for router in routers:
@@ -733,7 +750,9 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_ip_address_in_router(router, host, ipaddress_6.ipaddress.ipaddress, "eth4", True)
             self.verify_router_publicnic_state(router, host, "eth2|eth4")
 
-        # reboot router
+        # 20. reboot router
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth3 -> new ip 6
         for router in routers:
             cmd = rebootRouter.rebootRouterCmd()
             cmd.id = router.id
@@ -750,7 +769,9 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_ip_address_in_router(router, host, ipaddress_6.ipaddress.ipaddress, "eth3", True)
             self.verify_router_publicnic_state(router, host, "eth2|eth3")
 
-        # 20. restart network with cleanup
+        # 21. restart network with cleanup
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth3 -> new ip 6
         self.network1.restart(self.apiclient, cleanup=True)
         routers = self.get_routers(self.network1.id)
         for router in routers:
@@ -764,7 +785,9 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_ip_address_in_router(router, host, ipaddress_5.ipaddress.ipaddress, "eth3", False)
             self.verify_ip_address_in_router(router, host, ipaddress_6.ipaddress.ipaddress, "eth3", True)
 
-        # 21. restart network with cleanup, makeredundant=true
+        # 22. restart network with cleanup, makeredundant=true
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth3 -> new ip 6
         self.network1.restart(self.apiclient, cleanup=True, makeredundant=True)
         routers = self.get_routers(self.network1.id)
         for router in routers:
diff --git a/test/integration/component/test_multiple_subnets_in_isolated_network_rvr.py b/test/integration/component/test_multiple_subnets_in_isolated_network_rvr.py
index d798c2b2d9d..7b58e003e4a 100644
--- a/test/integration/component/test_multiple_subnets_in_isolated_network_rvr.py
+++ b/test/integration/component/test_multiple_subnets_in_isolated_network_rvr.py
@@ -308,6 +308,21 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
         # 17. release new ip 4
         #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,"
         #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth3 -> new ip 3, eth4 -> new ip 6
+        # 18. release new ip 3
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth4,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth4 -> new ip 6
+        # 19. restart network
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth4,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth4 -> new ip 6
+        # 20. reboot router
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth3 -> new ip 6
+        # 21. restart network with cleanup
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth3 -> new ip 6
+        # 22. restart network with cleanup, makeredundant=true
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth3 -> new ip 6
         """
 
         # Create new domain1
@@ -719,6 +734,8 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_router_publicnic_state(router, host, "eth2|eth4")
 
         # 19. restart network
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth4,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth4 -> new ip 6
         self.network1.restart(self.apiclient)
         routers = self.get_routers(self.network1.id)
         for router in routers:
@@ -733,7 +750,9 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_ip_address_in_router(router, host, ipaddress_6.ipaddress.ipaddress, "eth4", True)
             self.verify_router_publicnic_state(router, host, "eth2|eth4")
 
-        # reboot router
+        # 20. reboot router
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth3 -> new ip 6
         for router in routers:
             cmd = rebootRouter.rebootRouterCmd()
             cmd.id = router.id
@@ -750,7 +769,9 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_ip_address_in_router(router, host, ipaddress_6.ipaddress.ipaddress, "eth3", True)
             self.verify_router_publicnic_state(router, host, "eth2|eth3")
 
-        # 20. restart network with cleanup
+        # 21. restart network with cleanup
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth3 -> new ip 6
         self.network1.restart(self.apiclient, cleanup=True)
         routers = self.get_routers(self.network1.id)
         for router in routers:
@@ -764,3 +785,20 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_ip_address_in_router(router, host, ipaddress_5.ipaddress.ipaddress, "eth3", False)
             self.verify_ip_address_in_router(router, host, ipaddress_6.ipaddress.ipaddress, "eth3", True)
             self.verify_router_publicnic_state(router, host, "eth2|eth3")
+
+        # 22. restart network with cleanup, makeredundant=true
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,"
+        #   verify the IPs in VR. eth0 -> guest nic, eth2 -> source nat IP, eth3 -> new ip 6
+        self.network1.restart(self.apiclient, cleanup=True, makeredundant=True)
+        routers = self.get_routers(self.network1.id)
+        for router in routers:
+            host = self.get_router_host(router)
+            self.verify_network_interfaces_in_router(router, host, "eth0,eth1,eth2,eth3,")
+            guestIp, controlIp, sourcenatIp = self.get_router_ips(router)
+            self.verify_ip_address_in_router(router, host, guestIp, "eth0", True)
+            self.verify_ip_address_in_router(router, host, controlIp, "eth1", True)
+            self.verify_ip_address_in_router(router, host, sourcenatIp, "eth2", True)
+            self.verify_ip_address_in_router(router, host, ipaddress_4.ipaddress.ipaddress, "eth3", False)
+            self.verify_ip_address_in_router(router, host, ipaddress_5.ipaddress.ipaddress, "eth3", False)
+            self.verify_ip_address_in_router(router, host, ipaddress_6.ipaddress.ipaddress, "eth3", True)
+            self.verify_router_publicnic_state(router, host, "eth2|eth3")
diff --git a/test/integration/component/test_multiple_subnets_in_vpc.py b/test/integration/component/test_multiple_subnets_in_vpc.py
index f2b72af36c3..eaa42169771 100644
--- a/test/integration/component/test_multiple_subnets_in_vpc.py
+++ b/test/integration/component/test_multiple_subnets_in_vpc.py
@@ -318,6 +318,23 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
         # 18. release new ip 4
         #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,eth5,"
         #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> tier 1, eth3 -> new ip 3, eth4 -> tier 2, eth5 -> new ip 6
+        # 19. release new ip 3
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> tier 1, eth4 -> tier 2, eth5 -> new ip 6
+        # 20. restart tier1
+        # 22. restart VPC
+        # 23. Add private gateway
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> tier 1, eth4 -> tier 2, eth5 -> new ip 6, eth3-> private gateway
+        # 24. reboot router
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> new ip 6, eth3 -> tier 1, eth4 -> private gateway, eth5 -> tier 2
+        # 25. restart VPC with cleanup
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> new ip 6, eth3 -> tier 1, eth4 -> private gateway, eth5 -> tier 2
+        # 26. restart VPC with cleanup, makeredundant=true
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> new ip 6, eth3 -> tier 1, eth4 -> private gateway, eth5 -> tier 2
         """
 
         # Create new domain1
@@ -796,7 +813,7 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_router_publicnic_state(router, host, "eth1|eth3|eth5")
 
         # 19. release new ip 3
-        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,eth5,"
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth4,eth5,"
         #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> tier 1, eth4 -> tier 2, eth5 -> new ip 6
         ipaddress_3.delete(self.apiclient)
         routers = self.get_vpc_routers(self.vpc1.id)
@@ -855,7 +872,9 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_ip_address_in_router(router, host, ipaddress_6.ipaddress.ipaddress, "eth5", True)
             self.verify_router_publicnic_state(router, host, "eth1|eth5")
 
-        # Add private gateway
+        # 23. Add private gateway
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> tier 1, eth4 -> tier 2, eth5 -> new ip 6, eth3-> private gateway
         private_gateway_ip = "172.16." + str(random_subnet_number + 2) + ".1"
         private_gateway = PrivateGateway.create(
             self.apiclient,
@@ -879,7 +898,9 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_ip_address_in_router(router, host, ipaddress_6.ipaddress.ipaddress, "eth5", True)
             self.verify_router_publicnic_state(router, host, "eth1|eth3|eth5")
 
-        # reboot router
+        # 24. reboot router
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> new ip 6, eth3 -> tier 1, eth4 -> private gateway, eth5 -> tier 2
         routers = self.get_vpc_routers(self.vpc1.id)
         for router in routers:
             cmd = rebootRouter.rebootRouterCmd()
@@ -897,7 +918,9 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_ip_address_in_router(router, host, tier2_Ip, "eth5", True)
             self.verify_router_publicnic_state(router, host, "eth1|eth2|eth4")
 
-        # 23. restart VPC with cleanup
+        # 25. restart VPC with cleanup
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> new ip 6, eth3 -> tier 1, eth4 -> private gateway, eth5 -> tier 2
         self.vpc1.restart(self.apiclient, cleanup=True)
         routers = self.get_vpc_routers(self.vpc1.id)
         for router in routers:
@@ -912,7 +935,9 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_ip_address_in_router(router, host, tier2_Ip, "eth5", True)
             self.verify_router_publicnic_state(router, host, "eth1|eth2|eth4")
 
-        # 24. restart VPC with cleanup, makeredundant=true
+        # 26. restart VPC with cleanup, makeredundant=true
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> new ip 6, eth3 -> tier 1, eth4 -> private gateway, eth5 -> tier 2
         self.vpc1.restart(self.apiclient, cleanup=True, makeredundant=True)
         routers = self.get_vpc_routers(self.vpc1.id)
         for router in routers:
diff --git a/test/integration/component/test_multiple_subnets_in_vpc_rvr.py b/test/integration/component/test_multiple_subnets_in_vpc_rvr.py
index 84e8c824cd2..f6c0f5242d0 100644
--- a/test/integration/component/test_multiple_subnets_in_vpc_rvr.py
+++ b/test/integration/component/test_multiple_subnets_in_vpc_rvr.py
@@ -318,6 +318,23 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
         # 18. release new ip 4
         #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,eth5,"
         #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> tier 1, eth3 -> new ip 3, eth4 -> tier 2, eth5 -> new ip 6
+        # 19. release new ip 3
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> tier 1, eth4 -> tier 2, eth5 -> new ip 6
+        # 20. restart tier1
+        # 22. restart VPC
+        # 23. Add private gateway
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> tier 1, eth4 -> tier 2, eth5 -> new ip 6, eth3-> private gateway
+        # 24. reboot router
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> new ip 6, eth3 -> tier 1, eth4 -> private gateway, eth5 -> tier 2
+        # 25. restart VPC with cleanup
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> new ip 6, eth3 -> tier 1, eth4 -> private gateway, eth5 -> tier 2
+        # 26. restart VPC with cleanup, makeredundant=true
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> new ip 6, eth3 -> tier 1, eth4 -> private gateway, eth5 -> tier 2
         """
 
         # Create new domain1
@@ -796,7 +813,7 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_router_publicnic_state(router, host, "eth1|eth3|eth5")
 
         # 19. release new ip 3
-        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,eth5,"
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth4,eth5,"
         #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> tier 1, eth4 -> tier 2, eth5 -> new ip 6
         ipaddress_3.delete(self.apiclient)
         routers = self.get_vpc_routers(self.vpc1.id)
@@ -855,7 +872,9 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_ip_address_in_router(router, host, ipaddress_6.ipaddress.ipaddress, "eth5", True)
             self.verify_router_publicnic_state(router, host, "eth1|eth5")
 
-        # Add private gateway
+        # 23. Add private gateway
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> tier 1, eth4 -> tier 2, eth5 -> new ip 6, eth3-> private gateway
         private_gateway_ip = "172.16." + str(random_subnet_number + 2) + ".1"
         private_gateway = PrivateGateway.create(
             self.apiclient,
@@ -879,7 +898,9 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_ip_address_in_router(router, host, ipaddress_6.ipaddress.ipaddress, "eth5", True)
             self.verify_router_publicnic_state(router, host, "eth1|eth3|eth5")
 
-        # reboot router
+        # 24. reboot router
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> new ip 6, eth3 -> tier 1, eth4 -> private gateway, eth5 -> tier 2
         routers = self.get_vpc_routers(self.vpc1.id)
         for router in routers:
             cmd = rebootRouter.rebootRouterCmd()
@@ -897,7 +918,9 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_ip_address_in_router(router, host, tier2_Ip, "eth5", True)
             self.verify_router_publicnic_state(router, host, "eth1|eth2|eth4")
 
-        # 23. restart VPC with cleanup
+        # 25. restart VPC with cleanup
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> new ip 6, eth3 -> tier 1, eth4 -> private gateway, eth5 -> tier 2
         self.vpc1.restart(self.apiclient, cleanup=True)
         routers = self.get_vpc_routers(self.vpc1.id)
         for router in routers:
@@ -912,7 +935,9 @@ class TestMultiplePublicIpSubnets(cloudstackTestCase):
             self.verify_ip_address_in_router(router, host, tier2_Ip, "eth5", True)
             self.verify_router_publicnic_state(router, host, "eth1|eth2|eth4")
 
-        # 24. restart VPC with cleanup, makeredundant=true
+        # 26. restart VPC with cleanup, makeredundant=true
+        #   verify the available nics in VR should be "eth0,eth1,eth2,eth3,eth4,eth5,"
+        #   verify the IPs in VR. eth1 -> source nat IP, eth2 -> new ip 6, eth3 -> tier 1, eth4 -> private gateway, eth5 -> tier 2
         self.vpc1.restart(self.apiclient, cleanup=True, makeredundant=True)
         routers = self.get_vpc_routers(self.vpc1.id)
         for router in routers: