Linux stripping off VLAN header

Hi All,

In our system(RHEL 4 - 2.6.23.8) VLAN is being stripped off by the
driver(seems to be) wireshark capture doesnt show the VLAN tag. It is
important for our application which is acting as router to receive the
VLAN tags sent by the switch.
It happens only for incoming packets, outgoing packets are properly
left untouched, means tagged properly (tagged by our application). In
some discussion I saw that its related to VLAN hw acceleration being
enabled in the driver, if that is the reason then I still dont know
how to disable that.

Pls help.

Best Regards,
Prasanna.

Prasanna <(E-Mail Removed)> wrote:
> In our system(RHEL 4 - 2.6.23.8) VLAN is being stripped off by the
> driver(seems to be) wireshark capture doesnt show the VLAN tag. It
> is important for our application which is acting as router to
> receive the VLAN tags sent by the switch.

> It happens only for incoming packets, outgoing packets are properly
> left untouched, means tagged properly (tagged by our
> application). In some discussion I saw that its related to VLAN hw
> acceleration being enabled in the driver, if that is the reason then
> I still dont know how to disable that.

I can't say I know how to disable that in the driver either.
Particularly since you haven't mentioned _which_ driver you are using
and which version Even then I probably won't know how, but someone
else watching might. Or know if it is not possible at all.

rick jones
--
The computing industry isn't as much a game of "Follow The Leader" as
it is one of "Ring Around the Rosy" or perhaps "Duck Duck Goose."
- Rick Jones
these opinions are mine, all mine; HP might not want them anyway...
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...

Hi Ricky,

We are using Broadcam Corporation NetXtreme II BCM5708 Gigabit
ethernet card.

On Intel 82571EB giga eth controller this is not a problem VLAN
acceleration is disabled by default, but for us broadcam is the
onboard card we need to disable in that.

Best Regards,
Prasanna.

Prasanna <(E-Mail Removed)> wrote:
> Hi Ricky,

Um, who's Ricky? I've not been Ricky for nearly two-score years

> We are using Broadcam Corporation NetXtreme II BCM5708 Gigabit
> ethernet card.

I asked someone I know at Broadcom. The reply was that presently the
only way to avoid the stripping of the VLAN tags is to disable
management firmware. I was told you can request tools from the link
below to disable the management firmware.

http://www.broadcom.com/support/ethe...ortrequest.php

hth,

rick jones
--
portable adj, code that compiles under more than one compiler
these opinions are mine, all mine; HP might not want them anyway...
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...

On May 27, 8:57 pm, Rick Jones <rick.jon...@hp.com> wrote:
> Prasanna <prasannakumar...@gmail.com> wrote:
> > Hi Ricky,
>
> Um, who's Ricky? I've not been Ricky for nearly two-score years
>
> > We are using Broadcam Corporation NetXtreme II BCM5708 Gigabit
> > ethernet card.
>
> I asked someone I know at Broadcom. The reply was that presently the
> only way to avoid the stripping of the VLAN tags is to disable
> management firmware. I was told you can request tools from the link
> below to disable the management firmware.
>
> http://www.broadcom.com/support/ethe...ortrequest.php
>
> hth,
>
> rick jones
> --
> portable adj, code that compiles under more than one compiler
> these opinions are mine, all mine; HP might not want them anyway...
> feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...

Hi Rick Jones,

Sorry for Ricky and thanks for your answer.
After searching a lot I have also ended in that link I have to wait
and see for that.

Best Regards,
Prasanna.