* Problem Report: ns83820 / 802.1Q vlan / 2.4.23
@ 2003-12-08 13:56 Stephan von Krawczynski
2003-12-08 16:40 ` Stephan von Krawczynski
0 siblings, 1 reply; 2+ messages in thread
From: Stephan von Krawczynski @ 2003-12-08 13:56 UTC (permalink / raw)
To: linux-ns83820; +Cc: linux-kernel
Hello,
I just experienced a problem with ns83820 and 802.1Q vlan support. It seems
that incoming packets get dropped if the device is connected to a tagged switch
port. Reducing the mtu solves the problem but is of course not nice.
I remember some old docs where it says there can be problems because of the
oversized tagged packets. Intel e100 seems to work flawlessly in same setup.
Regards,
Stephan
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Problem Report: ns83820 / 802.1Q vlan / 2.4.23
2003-12-08 13:56 Problem Report: ns83820 / 802.1Q vlan / 2.4.23 Stephan von Krawczynski
@ 2003-12-08 16:40 ` Stephan von Krawczynski
0 siblings, 0 replies; 2+ messages in thread
From: Stephan von Krawczynski @ 2003-12-08 16:40 UTC (permalink / raw)
To: linux-ns83820; +Cc: linux-kernel
On Mon, 8 Dec 2003 14:56:22 +0100
Stephan von Krawczynski <skraw@ithnet.com> wrote:
> Hello,
>
> I just experienced a problem with ns83820 and 802.1Q vlan support. It seems
> that incoming packets get dropped if the device is connected to a tagged
> switch port. Reducing the mtu solves the problem but is of course not nice.
> I remember some old docs where it says there can be problems because of the
> oversized tagged packets. Intel e100 seems to work flawlessly in same setup.
Regarding this problem I just did this incredibly complex patch, which seems to
work. Maintainer please beat me...
;-)
Regards,
Stephan
--- drivers/net/ns83820.c-orig 2003-12-08 17:33:14.000000000 +0100
+++ drivers/net/ns83820.c 2003-12-08 17:33:31.000000000 +0100
@@ -141,7 +141,7 @@
#define NR_TX_DESC 128
/* not tunable */
-#define REAL_RX_BUF_SIZE (RX_BUF_SIZE + 14) /* rx/tx mac addr + type */
+#define REAL_RX_BUF_SIZE (RX_BUF_SIZE + 14 + 4) /* rx/tx mac addr + type + vlan*/
#define MIN_TX_DESC_FREE 8
^ permalink raw reply [flat|nested] 2+ messages in thread
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