Re: Disabling VLAN_HWTAGGING

From: David Gilbert (dgilbert_at_dclg.ca)
Date: 03/29/04

  • Next message: Ruslan Ermilov: "Re: Disabling VLAN_HWTAGGING" 
    Date: Mon, 29 Mar 2004 13:22:24 -0500
To: "Jacob S. Barrett" <jbarrett@amduat.net>

    >>>>> "Jacob" == Jacob S Barrett <jbarrett@amduat.net> writes:

    Jacob> On Thursday 25 March 2004 03:45 pm, you wrote:
    >> > Can you disable VLAN_HWTAGGING?
    >>
    >> Not without modifying if_nge.c, but it should be pretty trivial.

    Jacob> As trivial as setting chaning:
    ifp-> if_capabilities = IFCAP_HWCSUM | IFCAP_VLAN_HWTAGGING;
    Jacob> to:
    ifp-> if_capabilities = 0;

    Jacob> This didn't solve the problem completely though. On the remote
    Jacob> host I can now see tagged frames from the if_nge host, but the
    Jacob> reply frames from the if_em host or not visible at all on the
    Jacob> if_nge host (via tcpdump).

    Are you dumping all packets? We've found that you can dump a specific
    vlan on nge's, but you can't get good data by dumping the raw port
    itself. No matter how it's set, in both Linux and FreeBSD, many nge
    chipsets will not show vlan packets from the driver with a tcpdump.

    Dave. 

    -- 
============================================================================
|David Gilbert, Independent Contractor.       | Two things can only be     |
|Mail:       dave@daveg.ca                    |  equal if and only if they |
|http://daveg.ca                              |   are precisely opposite.  |
=========================================================GLO================
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  • Next message: Ruslan Ermilov: "Re: Disabling VLAN_HWTAGGING"