From: Guus Sliepen <guus@tinc-vpn.org>
Date: Thu, 15 Apr 2004 14:09:56 +0000 (+0000)
Subject: Increase MTU by 4 bytes to allow VLAN tagged Ethernet frames in hub and switch mode.
X-Git-Tag: import-tinc-1.1~783
X-Git-Url: https://git.meshlink.io/?a=commitdiff_plain;h=9e44f116bf0f72d1dd4f099440a351dbe0a74573;p=meshlink

Increase MTU by 4 bytes to allow VLAN tagged Ethernet frames in hub and switch mode.
---

diff --git a/src/net.h b/src/net.h
index 54663aa4..b5692ef2 100644
--- a/src/net.h
+++ b/src/net.h
@@ -28,9 +28,9 @@
 #include "ipv6.h"
 
 #ifdef ENABLE_JUMBOGRAMS
-#define MTU 9014				/* 9000 bytes payload + 14 bytes ethernet header */
+#define MTU 9018				/* 9000 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
 #else
-#define MTU 1514				/* 1500 bytes payload + 14 bytes ethernet header */
+#define MTU 1518				/* 1500 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
 #endif
 
 #define MAXSIZE (MTU + 4 + EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE + MTU/64 + 20)	/* MTU + seqno + padding + HMAC + compressor overhead */