Merge "Prevent raising exception if IP address is set in _hotplug_server"
diff --git a/tempest/scenario/test_network_basic_ops.py b/tempest/scenario/test_network_basic_ops.py
index d8584ec..f466729 100644
--- a/tempest/scenario/test_network_basic_ops.py
+++ b/tempest/scenario/test_network_basic_ops.py
@@ -297,9 +297,19 @@
         ip_mask = CONF.network.project_network_mask_bits
         # check if the address is not already in use, if not, set it
         if ' ' + ip_address + '/' + str(ip_mask) not in ip_output:
-            ssh_client.exec_command("sudo ip addr add %s/%s dev %s" % (
-                                    ip_address, ip_mask, new_nic))
-            ssh_client.exec_command("sudo ip link set %s up" % new_nic)
+            try:
+                ssh_client.exec_command("sudo ip addr add %s/%s dev %s" % (
+                                        ip_address, ip_mask, new_nic))
+                ssh_client.exec_command("sudo ip link set %s up" % new_nic)
+            except exceptions.SSHExecCommandFailed as exc:
+                if 'RTNETLINK answers: File exists' in str(exc):
+                    LOG.debug(
+                        'IP address %(ip_address)s is already set in device '
+                        '%(device)s\nPrevious "ip a" output: %(ip_output)s',
+                        {'ip_address': ip_address, 'device': new_nic,
+                         'ip_output': ip_output})
+                else:
+                    raise exc
 
     def _get_server_nics(self, ssh_client):
         reg = re.compile(r'(?P<num>\d+): (?P<nic_name>\w+)[@]?.*:')