diff --git a/openbsc/src/libiu/Makefile.am b/openbsc/src/libiu/Makefile.am
index 7b1ba4d..1968d3e 100644
--- a/openbsc/src/libiu/Makefile.am
+++ b/openbsc/src/libiu/Makefile.am
@@ -6,5 +6,5 @@
 
 noinst_LIBRARIES = libiu.a
 
-libiu_a_SOURCES = iu.c
+libiu_a_SOURCES = iu.c iu_vty.c
 
diff --git a/openbsc/src/libiu/iu_vty.c b/openbsc/src/libiu/iu_vty.c
new file mode 100644
index 0000000..91eed96
--- /dev/null
+++ b/openbsc/src/libiu/iu_vty.c
@@ -0,0 +1,50 @@
+/* OpenBSC Iu related interface to quagga VTY */
+/* (C) 2016 by sysmocom s.m.f.c. GmbH <info@sysmocom.de>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdlib.h>
+
+#include <osmocom/vty/command.h>
+#include <osmocom/vty/logging.h>
+
+/* Pointer to the actual asn_debug value as passed from main scopes. */
+static int *g_asn_debug_p = NULL;
+
+DEFUN(logging_asn_debug,
+      logging_asn_debug_cmd,
+      "logging asn1-debug (1|0)",
+      LOGGING_STR
+      "Log human readable representations of all ASN.1 messages to stderr\n"
+      "Log decoded ASN.1 messages to stderr\n"
+      "Do not log decoded ASN.1 messages to stderr\n")
+{
+	if (!g_asn_debug_p) {
+		vty_out(vty, "%%ASN.1 debugging not available%s", VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+
+	*g_asn_debug_p = atoi(argv[0]);
+	return CMD_SUCCESS;
+}
+
+void iu_vty_init(int *asn_debug_p)
+{
+	g_asn_debug_p = asn_debug_p;
+
+	install_element(CFG_LOG_NODE, &logging_asn_debug_cmd);
+}