diff --git a/src/settings/plugins/ifcfg-rh/reader.c b/src/settings/plugins/ifcfg-rh/reader.c
index ca512fc6c2..14a743dec6 100644
--- a/src/settings/plugins/ifcfg-rh/reader.c
+++ b/src/settings/plugins/ifcfg-rh/reader.c
@@ -4993,8 +4993,17 @@ connection_from_file_full (const char *filename,
 		type = svGetValue (parsed, "TYPE", FALSE);
 
 	if (!type) {
+		gs_free char *tmp = NULL;
 		char *device;
 
+		if ((tmp = svGetValue (parsed, "IPV6TUNNELIPV4", FALSE))) {
+			if (out_ignore_error)
+				*out_ignore_error = TRUE;
+			g_set_error (error, NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_INVALID_CONNECTION,
+			             "Ignoring unsupported connection due to IPV6TUNNELIPV4");
+			goto done;
+		}
+
 		device = svGetValue (parsed, "DEVICE", FALSE);
 		if (!device) {
 			g_set_error (error, NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_INVALID_CONNECTION,
diff --git a/src/settings/plugins/ifcfg-rh/tests/network-scripts/ifcfg-test-sit-ignore b/src/settings/plugins/ifcfg-rh/tests/network-scripts/ifcfg-test-sit-ignore
new file mode 100644
index 0000000000..a2581db67c
--- /dev/null
+++ b/src/settings/plugins/ifcfg-rh/tests/network-scripts/ifcfg-test-sit-ignore
@@ -0,0 +1,12 @@
+# this ifcfg-file represents a "sit" type without explicit TYPE.
+# Such connection types are not supported by NetworkManager and
+# the connection should be ignored based on the presence of
+# IPV6TUNNELIPV4.
+
+DEVICE=sit1
+BOOTPROTO=none
+ONBOOT=yes
+IPV6INIT=yes
+IPV6TUNNELIPV4=5.4.3.6
+IPV6TUNNELIPV4LOCAL=172.17.1.9
+IPV6ADDR=2001:470:2:3:4::2/64
diff --git a/src/settings/plugins/ifcfg-rh/tests/test-ifcfg-rh.c b/src/settings/plugins/ifcfg-rh/tests/test-ifcfg-rh.c
index 5fa84ed81f..1856a3a62a 100644
--- a/src/settings/plugins/ifcfg-rh/tests/test-ifcfg-rh.c
+++ b/src/settings/plugins/ifcfg-rh/tests/test-ifcfg-rh.c
@@ -8735,6 +8735,20 @@ test_read_vlan_trailing_spaces (void)
 	g_object_unref (connection);
 }
 
+/*****************************************************************************/
+
+static void
+test_sit_read_ignore (void)
+{
+	gs_free_error GError *error = NULL;
+
+	_connection_from_file_fail (TEST_IFCFG_DIR "/network-scripts/ifcfg-test-sit-ignore",
+	                            NULL, TYPE_ETHERNET, &error);
+	nmtst_assert_error (error, 0, 0, "*Ignoring unsupported connection due to IPV6TUNNELIPV4*");
+}
+
+/*****************************************************************************/
+
 
 #define TPATH "/settings/plugins/ifcfg-rh/"
 
@@ -8971,6 +8985,8 @@ int main (int argc, char **argv)
 	g_test_add_func (TPATH "team/write-port", test_write_team_port);
 	g_test_add_func (TPATH "team/read-port-empty-config", test_read_team_port_empty_config);
 
+	g_test_add_func (TPATH "sit/read/ignore", test_sit_read_ignore);
+
 	/* Stuff we expect to fail for now */
 	g_test_add_func (TPATH "pppoe/write-wired", test_write_wired_pppoe);
 	g_test_add_func (TPATH "vpn/write", test_write_vpn);