Date: Fri, 9 Jun 2006 20:25:32 -0400 From: Jung-uk Kim <jkim@FreeBSD.org> To: freebsd-net@FreeBSD.org Cc: Mikhail Teterin <mi+mx@aldan.algebra.com>, wpaul@windriver.com, Brad <brad@comstyle.com> Subject: Re: Can't turn on Jumbo Frames on bge0 Message-ID: <200606092025.35165.jkim@FreeBSD.org> In-Reply-To: <20060609235734.GG22853@blar.home.comstyle.com> References: <200606091949.07501.mi%2Bmx@aldan.algebra.com> <20060609235734.GG22853@blar.home.comstyle.com>
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On Friday 09 June 2006 07:57 pm, Brad wrote: > On Fri, Jun 09, 2006 at 07:49:07PM -0400, Mikhail Teterin wrote: > > Hello! > > > > I have a bge card, that's identified as: > > > > bge0: <Broadcom BCM5751 Gigabit Ethernet, ASIC rev. 0x4001> mem > > 0xfe8f0000-0xfe8fffff irq 16 at device 0.0 on pci2 > > > > According to > > http://h18000.www1.hp.com/products/quickspecs/12131_div/12131_div > >.HTML, the BCM5751 support jumbo frames up to 9Kb. > > > > However, when I try to increase the MTU on the card even by a > > little bit, I get: > > > > root@mi:/misha/mi (122) ifconfig bge0 mtu 1501 > > ifconfig: ioctl (set mtu): Invalid argument > > > > Is the hardware lacking the capability, or am I doing something > > wrong? > > There is a mistake on that web-page. None of Broadcom's PCI Express > chipsets support Jumbo frames. I believe you are correct. BTW, funny thing is I found several web pages by googling: http://manuals.fujitsu-siemens.com/serverbooks/content/manuals/html/broadcom/features.htm http://supportapj.dell.com/support/edocs/network/P29352/English/features.htm Fujitsu-Simens says: 'Jumbo frames (up to 9 KB) (except for BCM5721 and BCM5751)' Dell says: 'Jumbo frames (up to 9 kB) (only for BCM5721 and BCM5751)' :-) Jung-uk Kim
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