Re: PATCH: VLAN support for 3c59x/3c90x

From: Ben Greear (greearb_at_candelatech.com)
Date: 07/29/04

  • Next message: Peter Chubb: "Re: stat very inefficient" 
    Date:	Wed, 28 Jul 2004 15:30:53 -0700
To: Alan Cox <alan@redhat.com>

    Alan Cox wrote:
    > On Wed, Jul 28, 2004 at 02:33:56PM -0700, Ben Greear wrote:
    >
    >>>Stefan de Konink ported this code from the 2.4 VLAN patches and tested it
    >>>extensively. I cleaned up the ifdefs and fixed a problem with bracketing
    >>>that made older cards fail.
    >>
    >>I am sure this will be appreciated by the VLAN users!
    >>
    >>Also, do you happen to know how large of an MTU these cards
    >>can support?
    >
    >
    > In VLAN mode they support just the extra VLAN bits, with the length
    > checking turned off its either FDDI or jumbo frame size but I don't remember
    > which. I think FDDI.

    So if you try to configure the MTU to 1504 using ifconfig or whatever,
    will that actually work?

    One reason I ask is that I saw a report of a bug/issue where it was
    not possible to send a raw-packet from user space that is bigger than
    the MTU. This would preclude user-space from generating a VLAN packet
    with the extra 4 bytes. Being able to change the MTU would at least
    partially work around this issue.

    Ben 

    -- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com
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