Re: Disabling VLAN_HWTAGGING

From: Jacob S. Barrett (jbarrett_at_amduat.net)
Date: 03/27/04

  • Next message: leo luis: "MPD multilink with modems" 
    To: Ruslan Ermilov <ru@freebsd.org>
Date: Sat, 27 Mar 2004 08:48:37 -0800

    On Saturday 27 March 2004 07:53 am, Jacob S. Barrett wrote:
    > Well with a new "correct" MAC that pings go back and forth just fine now.
    > I will back out all my changes and see if they still work with the hardware
    > tagging/detagging enabled.

    OK, with the hardware support re-enabled the frame now enters the driver. It
    is detected as VLAN frame and sent to VLAN_INPUT_TAG. The frame is then
    delivered via lower hook to the ng_vlan where it doesn't match the vlan tag
    so it goes out the nomatch hook. I guess with the VLAN tag stripped from the
    frame that ng_vlan can't match it. Is this the expected behavior with
    ng_vlan? I can just comment out the VLAN stripping line in the driver if it
    is the expected behavior. That isn't a big deal really.

    I haven't done a whole lot with the network interface drivers other than a few
    minor fixes here and there, but would it be hard to add some sort of flag to
    enable/disable the tag stripping via ifconfig? I was thinking that could be
    down through a "linkx" flag right? If the driver got the say "link1" it
    would down the interface, set clear the stripping config bits, and then re-up
    the interface. Or would this be better handled by a sysctl option? Does
    that sound safe and do-able? 

    -- 
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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