diff --git a/ifupdown2/addons/address.py b/ifupdown2/addons/address.py
index 756b1ec..54704bd 100644
--- a/ifupdown2/addons/address.py
+++ b/ifupdown2/addons/address.py
@@ -835,19 +835,25 @@ class address(AddonWithIpBlackList, moduleBase):
                     self.sysfs.link_set_mtu(ifaceobj.name, mtu_str=self.default_mtu, mtu_int=self.default_mtu_int)
                 return
 
-            if (ifupdownconfig.config.get('adjust_logical_dev_mtu', '1') != '0'
-                and ifaceobj.lowerifaces):
-                # set vlan interface mtu to lower device mtu
-                if (ifaceobj.link_kind & ifaceLinkKind.VLAN):
-                    lower_iface = ifaceobj.lowerifaces[0]
-                    lower_iface_mtu_int = self.cache.get_link_mtu(lower_iface)
+            # set vlan interface mtu to lower device mtu
+            if (
+                ifupdownconfig.config.get('adjust_logical_dev_mtu', '1') != '0'
+                and ifaceobj.lowerifaces
+                and ifaceobj.link_kind & ifaceLinkKind.VLAN
+            ):
+                lower_iface = ifaceobj.lowerifaces[0]
+                lower_iface_mtu_int = self.cache.get_link_mtu(lower_iface)
 
-                    if lower_iface_mtu_int != cached_link_mtu:
-                        self.sysfs.link_set_mtu(ifaceobj.name, mtu_str=str(lower_iface_mtu_int), mtu_int=lower_iface_mtu_int)
+                if lower_iface_mtu_int != cached_link_mtu:
+                    self.sysfs.link_set_mtu(ifaceobj.name, mtu_str=str(lower_iface_mtu_int), mtu_int=lower_iface_mtu_int)
 
-        elif (not (ifaceobj.name == 'lo') and not ifaceobj.link_kind and
-              not (ifaceobj.link_privflags & ifaceLinkPrivFlags.BOND_SLAVE) and
-              self.default_mtu):
+        elif (
+            not (ifaceobj.name == 'lo')
+            and not ifaceobj.link_kind
+            and not (ifaceobj.link_privflags & ifaceLinkPrivFlags.BOND_SLAVE)
+            and self.default_mtu
+            and cached_link_mtu != self.default_mtu_int
+        ):
             # logical devices like bridges and vlan devices rely on mtu
             # from their lower devices. ie mtu travels from
             # lower devices to upper devices. For bonds mtu travels from
@@ -856,8 +862,7 @@ class address(AddonWithIpBlackList, moduleBase):
             # config by the kernel in play, we try to be cautious here
             # on which devices we want to reset mtu to default.
             # essentially only physical interfaces which are not bond slaves
-            if cached_link_mtu != self.default_mtu_int:
-                self.sysfs.link_set_mtu(ifaceobj.name, mtu_str=self.default_mtu, mtu_int=self.default_mtu_int)
+            self.sysfs.link_set_mtu(ifaceobj.name, mtu_str=self.default_mtu, mtu_int=self.default_mtu_int)
 
     def _set_bridge_forwarding(self, ifaceobj):
         """ set ip forwarding to 0 if bridge interface does not have a
@@ -1183,12 +1188,11 @@ class address(AddonWithIpBlackList, moduleBase):
 
         if hwaddress_int != utils.mac_str_to_int(running_hwaddress):
             slave_down = False
-            if ifaceobj.link_kind & ifaceLinkKind.BOND:
+            if ifaceobj.link_kind & ifaceLinkKind.BOND and ifaceobj.lowerifaces:
                 # if bond, down all the slaves
-                if ifaceobj.lowerifaces:
-                    for l in ifaceobj.lowerifaces:
-                        self.netlink.link_down(l)
-                    slave_down = True
+                for l in ifaceobj.lowerifaces:
+                    self.netlink.link_down(l)
+                slave_down = True
             try:
                 self.netlink.link_set_address(ifaceobj.name, hwaddress, hwaddress_int)
                 old_mac_addr = running_hwaddress
@@ -1411,8 +1415,7 @@ class address(AddonWithIpBlackList, moduleBase):
         # removed from the configuration file but the IP is still configured on
         # the device, so we need to mark them as FAIL (we will only mark them
         # as failure on the first sibling).
-        if ifaceobj.flags & iface.HAS_SIBLINGS:
-            if not ifaceobj.flags & iface.YOUNGEST_SIBLING:
+        if ifaceobj.flags & iface.HAS_SIBLINGS and not ifaceobj.flags & iface.YOUNGEST_SIBLING:
                 return
 
         all_stanza_user_config_ip = self.cache.get_user_configured_addresses(ifaceobj_list)