Try the following if you are using vlan's
--- bridge.orig/net/bridge/br_forward.c 2006-04-10 16:17:51.000000000 -0700
+++ bridge/net/bridge/br_forward.c 2006-04-19 10:03:58.000000000 -0700
@@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
+#include <linux/if_vlan.h>
#include <linux/netfilter_bridge.h>
#include "br_private.h"
@@ -29,11 +30,17 @@
return 1;
}
+static inline unsigned eth_length(const struct sk_buff *skb)
+{
+ return skb->protocol == htons(ETH_P_8021Q)
+ ? skb->len - VLAN_HLEN : skb->len;
+}
+
int br_dev_queue_push_xmit(struct sk_buff *skb)
{
- /* drop mtu oversized packets except tso */
- if (skb->len > skb->dev->mtu && !skb_shinfo(skb)->tso_size)
- kfree_skb(skb);
+ /* drop mtu oversized packets except tso (local) and allow vlan's */
+ if (eth_length(skb) > skb->dev->mtu && !skb_shinfo(skb)->tso_size)
+ dev_kfree_skb(skb);
else {
#ifdef CONFIG_BRIDGE_NETFILTER
/* ip_refrag calls ip_fragment, doesn't copy the MAC header. */
