Re: Disabling VLAN_HWTAGGING

From: Ruslan Ermilov (ru_at_freebsd.org)
Date: 03/26/04

  • Next message: Jacob S. Barrett: "Re: Disabling VLAN_HWTAGGING" 
    Date: Fri, 26 Mar 2004 01:45:27 +0200
To: "Jacob S. Barrett" <jbarrett@amduat.net>

    On Thu, Mar 25, 2004 at 11:18:40AM -0800, Jacob S. Barrett wrote:
    > Can you disable VLAN_HWTAGGING?
    >
    Not without modifying if_nge.c, but it should be pretty trivial.

    > I am seeing very strange behavior on a if_nge card with VLANs. If i try and
    > connect an if_vlan to it the kernel panics. If I connect a ng_vlan to it
    > tcpdump show that the tagged frames are "leaving" the if_nge interface, but
    > tcpdump running on a remote host that is crossed over (if_em) show no frames
    > leaving the if_nge.
    >
    ng_vlan(4) doesn't provide support for hardware VLAN tagging for output
    frames -- it always emits ETHERTYPE_VLAN type Ethernet frames.

    > I am wondering if it is something to do VLAN_HWTAGGING. The if_em cards I
    > have don't do it and work fine, but the if_nge cards don't work at all.
    >
    What FreeBSD version you're seeing the panic on?

    Cheers, 

    -- 
Ruslan Ermilov
FreeBSD committer
ru@FreeBSD.org

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