Date: Wed, 27 Jun 2007 17:22:16 +0900 From: Pyun YongHyeon <pyunyh@gmail.com> To: george+freebsd@m5p.com, freebsd-hackers@freebsd.org Subject: Re: Gigabit Ethernet w/Jumbo Frames Message-ID: <20070627082216.GB45303@cdnetworks.co.kr> In-Reply-To: <20070627061223.GE1221@funkthat.com> References: <200706270033.l5R0Xkf9084990@mail.reprise.com> <20070627061223.GE1221@funkthat.com>
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On Tue, Jun 26, 2007 at 11:12:23PM -0700, John-Mark Gurney wrote: > george+freebsd@m5p.com wrote this message on Tue, Jun 26, 2007 at 17:33 -0700: > > I'm having poor luck trying to use NFS over a gigabit ethernet using > > jumbo frames. By all indications, my switch (Netgear GS608) forwards > > jumbo frames with no difficulty, but my Realtek 8169-based cards seem > > Are you sure? I just tried w/ my GS608 again, and it still doesn't > pass jumbo frames... I specifically bought a second switch, an SMC > 8508T so that I could work on jumbo frame support... I took my MBP > to the SMC and verified that I could ping 5k packets w/o fragmentation > between the two (MBP and a FreeBSD-current box w/ an em card) boxes, > and then took my MBP to the Netgear, and the remote box would not see > the large pings... > > I just checked Netgear's website, and they do list Jumbo Frame support.. > Either I have an old switch and newer ones support it, or they depend > upon that most people can't figure out to make jumbo frames work > reliabily and depend upon people just using 1500 byte frames... > I guess re(4) should not generate watchdog errors even if intermediate switches drop/fragment jumbo frames. -- Regards, Pyun YongHyeon
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