1 files changed, 5 insertions, 0 deletions
diff --git a/usr/local/www/interfaces_groups_edit.php b/usr/local/www/interfaces_groups_edit.php
index 51feffd..430bd7b 100755
--- a/usr/local/www/interfaces_groups_edit.php
+++ b/usr/local/www/interfaces_groups_edit.php
@@ -71,6 +71,11 @@ if ($_POST) {
 	if (preg_match("/([^a-zA-Z])+/", $_POST['ifname'], $match))
 		$input_errors[] = "Only letters A-Z are allowed as the group name.";
 
+	$ifaces = get_configured_interface_with_descr();
+	foreach ($ifaces as $gif => $gdescr) {
+		if ($gdescr == $_POST['ifname'] || $gif == $_POST['ifname'])
+			$input_errors[] = "The specified group name is already used by an interface. Please choose another name.";
+	}
 	$ifgroupentry = array();
 	$ifgroupentry['ifname'] = $_POST['ifname'];
 	$members = "";