From 608db4bb4416202b2b34edd85e0ec953da72810b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bastian=20M=C3=A4user?= <mephisto@mephis.to>
Date: Sat, 21 Jul 2018 01:45:36 +0200
Subject: [PATCH] Substract Batman Overhead from v6 radvd MTU Link announce

---
 roles/radvd/templates/radvd.conf.j2 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/roles/radvd/templates/radvd.conf.j2 b/roles/radvd/templates/radvd.conf.j2
index 79e7a33..809169b 100644
--- a/roles/radvd/templates/radvd.conf.j2
+++ b/roles/radvd/templates/radvd.conf.j2
@@ -6,7 +6,7 @@ interface br-{{ site_code }} {
   AdvManagedFlag off;
   AdvOtherConfigFlag on;
   MaxRtrAdvInterval 200;
-  AdvLinkMTU {{ mtu }};
+  AdvLinkMTU {{ (mtu | int) - 32 }};
   prefix {{ batman_ipv6 | ipaddr('address') | ipsubnet(64) }} {
     AdvOnLink on;
     AdvAutonomous on;