From 1440ef93e13d15e2247cbfc2cb4ea2afb266fc9e Mon Sep 17 00:00:00 2001
From: Yuxiang Zhu <vfreex@gmail.com>
Date: Thu, 29 Dec 2022 08:12:26 +0000
Subject: T4898: Add mtu config option for dummy interfaces

I use dummy interfaces in a VRF as source-interfaces for VXLAN in order to force VXLAN send underlay UDP traffic through the VRF where the dummy interface resides.

However dummy interface has no mtu option so it always gets an MTU of 1500. This will cause an error when the mtu of dummy is not large enough for the VXLAN traffic.

Adding this option in the config template will solve this.
---
 interface-definitions/interfaces-dummy.xml.in | 1 +
 1 file changed, 1 insertion(+)

diff --git a/interface-definitions/interfaces-dummy.xml.in b/interface-definitions/interfaces-dummy.xml.in
index eb525b547..1ffd04a3d 100644
--- a/interface-definitions/interfaces-dummy.xml.in
+++ b/interface-definitions/interfaces-dummy.xml.in
@@ -27,6 +27,7 @@
               #include <include/interface/source-validation.xml.i>
             </children>
           </node>
+          #include <include/interface/mtu-68-16000.xml.i>
           #include <include/interface/mirror.xml.i>
           #include <include/interface/netns.xml.i>
           #include <include/interface/redirect.xml.i>
-- 
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