Date: Fri, 26 Jul 2013 16:59:51 -0400 (EDT) From: Daniel Feenberg <feenberg@nber.org> To: "Alexander V. Chernikov" <melifaro@FreeBSD.org> Cc: Barney Cordoba <barney_cordoba@yahoo.com>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: Recommendations for 10gbps NIC Message-ID: <alpine.LRH.2.03.1307261646050.25254@nber.org> In-Reply-To: <51F2A313.9070105@FreeBSD.org> References: <51F0386D.2000709@acm.poly.edu> <51F16A07.9030505@FreeBSD.org> <1374852658.90079.YahooMailNeo@web121601.mail.ne1.yahoo.com> <51F2A313.9070105@FreeBSD.org>
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On Fri, 26 Jul 2013, Alexander V. Chernikov wrote: > On 26.07.2013 19:30, Barney Cordoba wrote: >> >> >> ------------------------------------------------------------------------ >> *From:* Alexander V. Chernikov <melifaro@FreeBSD.org> >> *To:* Boris Kochergin <spawk@acm.poly.edu> >> *Cc:* freebsd-net@freebsd.org >> *Sent:* Thursday, July 25, 2013 2:10 PM >> *Subject:* Re: Recommendations for 10gbps NIC >> >> On 25.07.2013 00:26, Boris Kochergin wrote: >> > Hi. >> Hello. >> > >> > I am looking for recommendations for a 10gbps NIC from someone who has >> > successfully used it on FreeBSD. It will be used on FreeBSD 9.1-R/amd64 >> > to capture packets. Some desired features are: >> > We have experience with HP NC523SFP and Chelsio N320E. The key difference among 10GBE cards for us is how they treat foreign DACs. The HP would PXE boot with several brands and generic DACs, but the Chelsio required a Chelsio brand DAC to PXE boot. There was firmware on the NIC to check the brand of cable. Both worked fine once booted. The Chelsio cables were hard to find, which became a problem. Also, when used with diskless Unix clients the Chelsio cards seemed to hang from time to time. Otherwise packet loss was one in a million for both cards, even with 7 meter cables. We liked the fact that the Chelsio cards were single-port and cheaper. I don't really understand why nearly all 10GBE cards are dual-port. Surely there is a market for NICs between 1 gigabit and 20 gigabit. The NIC heatsinks are too hot to touch during use unless specially cooled. Daniel Feenberg NBER
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