Date: Thu, 22 Jan 2004 19:22:53 -0800 From: Mike Hunter <mhunter@ack.Berkeley.EDU> To: Brooks Davis <brooks@one-eyed-alien.net> Cc: freebsd-net@freebsd.org Subject: Re: Dell D800 (FBSD 5.2-release) Broadcom BCM5705M MTU/Jumbo Problem Message-ID: <20040123032253.GB19208@ack.Berkeley.EDU> In-Reply-To: <20040123012806.GA608@Odin.AC.HMC.Edu> References: <20040123011206.GA1701@ack.Berkeley.EDU> <20040123012806.GA608@Odin.AC.HMC.Edu>
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On Jan 22, "Brooks Davis" wrote: > On Thu, Jan 22, 2004 at 05:12:06PM -0800, Mike Hunter wrote: > > > > 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. Thanks for the help everybody. "I will not 'read' C files with `grep`. I will not 'read' C files with `grep`. I will not 'read' C files with `grep`...." Mike
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