Re: Dell D800 (FBSD 5.2-release) Broadcom BCM5705M MTU/Jumbo Problem

From: Brooks Davis (brooks_at_one-eyed-alien.net)
Date: 01/23/04

  • Next message: Eric Anderson: "Re: [D800] Dell D800 (FBSD 5.2-release) Broadcom BCM5705M MTU/Jumbo Problem" 
    Date: Thu, 22 Jan 2004 17:28:06 -0800
To: Mike Hunter <mhunter@ack.Berkeley.EDU>

    On Thu, Jan 22, 2004 at 05:12:06PM -0800, Mike Hunter wrote:
    > Hi everybody,
    >
    > I'm going to be trying to get gigabit throughput between my laptop (Dell
    > Latitude D800 running 5.2-release) and a shuttle box running FreeBSD 5.1
    > (not in front of me at the moment.) As part of the process, I attempted
    > to increase the frame size on my laptop, only to be greeted with
    > disappointment:
    >
    > celeste# ifconfig bge0
    > bge0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
    > options=1b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING>
    > ether 00:0b:db:99:d6:06
    > media: Ethernet 1000baseTX <full-duplex> (none)
    > status: no carrier
    > celeste# ifconfig bge0 mtu 9000
    > ifconfig: ioctl (set mtu): Invalid argument
    > celeste# ifconfig bge0 mtu 1501
    > ifconfig: ioctl (set mtu): Invalid argument
    > celeste# ifconfig bge0 mtu 1500
    > celeste#
    >
    > The C file talks about being able to do jumbo frames when the mtu is big
    > enough...anybody know what I'm missing? My card is a "Broadcom BCM5705M"
    > and I'm running FreeBSD 5.2-release. When I asked google, it mostly
    > pointed me at comments in if_bge.c talking about jumbo frames :|

    From looking at the code, BCM5705's don't support Jumbo Frames.

    -- Brooks 

    -- 
Any statement of the form "X is the one, true Y" is FALSE.
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  • Next message: Eric Anderson: "Re: [D800] Dell D800 (FBSD 5.2-release) Broadcom BCM5705M MTU/Jumbo Problem"

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