Re: Disabling VLAN_HWTAGGING

From: Jacob S. Barrett (jbarrett_at_amduat.net)
Date: 03/29/04

  • Next message: Roberto Nunnari: "Re: Disabling VLAN_HWTAGGING" 
    To: Ruslan Ermilov <ru@FreeBSD.org>
Date: Mon, 29 Mar 2004 09:36:49 -0800

    On Monday 29 March 2004 12:12 am, Ruslan Ermilov <ru@FreeBSD.org> wrote:
    > No, this is not of course expected. Can you add some debug printfs
    > in the ng_vlan.c:ng_vlan_rcvdata() and see if it ever receives the
    > VLAN tag, and if so, print its value (perhaps the tag is entered by
    > a driver in a network byte order).

    Bingo... I will dig around in if_nge.c to figure out where to swap the bytes.

    > Well, for IP/TCP/UDP checksumming, it's possible to switch the
    > corresponding bit in the interface's enabled capabilities field.
    > OTOH, switching VLAN stripping on/off requires reprogramming of
    > the hardware.
    >
    > Generally, if the hardware supports IP/TCP/UDP checksumming and
    > or VLAN tag removal/insertion, it's better to use it. We'd
    > better find the root of the problem and fix it. ;)

    I agree, so now that we have found it I will try to fix it. Thanks for your
    help. 

    -- 
Jacob S. Barrett
jbarrett@amduat.net
www.amduat.net
"I don't suffer from insanity, I enjoy every minute of it."
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  • Next message: Roberto Nunnari: "Re: Disabling VLAN_HWTAGGING"