From f1d08a9205bf8396cd872d67c5671adfa09297a2 Mon Sep 17 00:00:00 2001
From: Franco Fichtner <franco@opnsense.org>
Date: Tue, 23 Oct 2018 08:39:33 +0200
Subject: [PATCH] interfaces: annotate review issue by @adschellevis

---
 src/etc/inc/interfaces.inc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/etc/inc/interfaces.inc b/src/etc/inc/interfaces.inc
index c8891cef1..7339c294f 100644
--- a/src/etc/inc/interfaces.inc
+++ b/src/etc/inc/interfaces.inc
@@ -1088,6 +1088,12 @@ function interface_bring_down($interface = "wan", $ifacecfg = false)
     }
 
     if (does_interface_exist($realifv6)) {
+        /*
+         * XXX So we flush ARP on IPv6 here!  But why?
+         *
+         * Either we want to flush NDP or both ARP
+         * and NDP, but then the same goes for IPv4.
+         */
         $arpflush[$realifv6] = 1;
 
         if (!empty(trim(@file_get_contents("/tmp/{$realifv6}_routerv6")))) {