Re: Disabling VLAN_HWTAGGING

From: Roberto Nunnari (roberto.nunnari_at_supsi.ch)
Date: 03/29/04

  • Next message: David Gilbert: "Re: Disabling VLAN_HWTAGGING" 
    Date: Mon, 29 Mar 2004 19:58:16 +0200
To: "Jacob S. Barrett" <jbarrett@amduat.net>

    Hello.

    Jacob S. Barrett wrote:
    > 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.
    >

    Do you believe this may also be the root cause of my fatal
    trap 12 I'm experiencing? see my posts with subject:
    Fatal trap in rt_msg2

    Best regards. 

    -- 
               Roberto Nunnari -software engineer-
                mailto:roberto.nunnari@supsi.ch
  Scuola Universitaria Professionale della Svizzera Italiana
              Dipartimento Tecnologie Innovative
                   http://www.dti.supsi.ch
  SUPSI-DTI
  Via Cantonale                        tel: +41-91-6108561
  6928 Manno                 """       fax: +41-91-6108570
  Switzerland               (o o)
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  • Next message: David Gilbert: "Re: Disabling VLAN_HWTAGGING"