systemd/patches/systemd-228-networkd-link-do-not-drop-config-for-loopback-device.patch

--- systemd/src/network/networkd-link.c	2016-01-14 14:31:32.518552946 +0100
+++ systemd-patched/src/network/networkd-link.c	2016-01-14 14:33:29.874884552 +0100
@@ -2040,9 +2040,13 @@
         assert(link->network);
         assert(link->state == LINK_STATE_PENDING);
 
-        r = link_drop_foreign_config(link);
-        if (r < 0)
-                return r;
+        /* Drop foreign config, but ignore loopback device.
+         * We do not want to remove loopback address. */
+        if (!(link->flags & IFF_LOOPBACK)) {
+                r = link_drop_foreign_config(link);
+                if (r < 0)
+                        return r;
+        }
 
         r = link_set_bridge_fdb(link);
         if (r < 0)
1	--- systemd/src/network/networkd-link.c 2016-01-14 14:31:32.518552946 +0100
2	+++ systemd-patched/src/network/networkd-link.c 2016-01-14 14:33:29.874884552 +0100
3	@@ -2040,9 +2040,13 @@
4	assert(link->network);
5	assert(link->state == LINK_STATE_PENDING);
6
7	- r = link_drop_foreign_config(link);
8	- if (r < 0)
9	- return r;
10	+ /* Drop foreign config, but ignore loopback device.
11	+ * We do not want to remove loopback address. */
12	+ if (!(link->flags & IFF_LOOPBACK)) {
13	+ r = link_drop_foreign_config(link);
14	+ if (r < 0)
15	+ return r;
16	+ }
17
18	r = link_set_bridge_fdb(link);
19	if (r < 0)