From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp97.iad3a.emailsrvr.com (smtp97.iad3a.emailsrvr.com [173.203.187.97]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id 11F4C21F289 for ; Tue, 9 Sep 2014 09:26:05 -0700 (PDT) Received: from localhost (localhost.localdomain [127.0.0.1]) by smtp29.relay.iad3a.emailsrvr.com (SMTP Server) with ESMTP id 8B0BB38086B; Tue, 9 Sep 2014 12:26:03 -0400 (EDT) X-Virus-Scanned: OK Received: from app51.wa-webapps.iad3a (relay-webapps.rsapps.net [172.27.255.140]) by smtp29.relay.iad3a.emailsrvr.com (SMTP Server) with ESMTP id 618133808A7; Tue, 9 Sep 2014 12:26:03 -0400 (EDT) X-Sender-Id: dpreed@reed.com Received: from app51.wa-webapps.iad3a (relay-webapps.rsapps.net [172.27.255.140]) by 0.0.0.0:25 (trex/5.2.10); Tue, 09 Sep 2014 16:26:03 GMT Received: from reed.com (localhost.localdomain [127.0.0.1]) by app51.wa-webapps.iad3a (Postfix) with ESMTP id 49C3F30004D; Tue, 9 Sep 2014 12:26:03 -0400 (EDT) Received: by apps.rackspace.com (Authenticated sender: dpreed@reed.com, from: dpreed@reed.com) with HTTP; Tue, 9 Sep 2014 12:26:03 -0400 (EDT) Date: Tue, 9 Sep 2014 12:26:03 -0400 (EDT) From: dpreed@reed.com To: "=?utf-8?Q?Joel_Wir=C4=81mu_Pauling?=" MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_20140909122603000000_28241" Importance: Normal X-Priority: 3 (Normal) X-Type: html In-Reply-To: References: Message-ID: <1410279963.30013719@apps.rackspace.com> X-Mailer: webmail7.0 Cc: Wes Felter , "cerowrt-devel@lists.bufferbloat.net" Subject: Re: [Cerowrt-devel] =?utf-8?q?10GigE_nics_and_SFP+_modules=3F?= X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Sep 2014 16:26:35 -0000 ------=_20140909122603000000_28241 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =0AI agree with you if you have to install Cat6a and Cat7 structured wiring= in a building! What a nightmare trying to find contractors who can meet sp= ec on junction boxes, etc. and do the right testing. Every connector on th= e path is problematic.=0A=0ABut for "casual" home networking use or researc= h lab experiments, copper is fine. That was my point. I think in a "rack-= scale" datascenter networking situation. probably better to go with fiber, = but copper costs are attractive.=0A =0A =0A=0A=0AOn Tuesday, September 9, 2= 014 12:06am, "Joel Wir=C4=81mu Pauling" said:=0A=0A=0A= =0A> Note I know whilst you are talking copper. IME 10Gbit copper is=0A> no= thing but a hassle. You are lucky to get 30Metres out of a run=0A> without = Negotiation issues.=0A> =0A> I encourage you strongly to look to using Opti= cal LX style fibre if=0A> you are moving to 10G. The cost of structured cab= ling and the length=0A> of runs is a lot cheaper than Cat6a/7 runs needed f= or 10gbit copper.=0A> =0A> On 9 September 2014 16:03, Joel Wir=C4=81mu Paul= ing =0A> wrote:=0A> > Just a head's up I have had issues= with the X5xx intel SFP+ optics=0A> > interoperating with other vendors. T= his may not be an issue for your=0A> > deployment.=0A> >=0A> > If you want = good interop then Broadcom based optics seem to be the=0A> > best bet at th= e moment.=0A> >=0A> > On 9 September 2014 12:09, Wes Felter wrote:=0A> >> The Intel X710 just came out today; it's a little cheaper. = (Note that the=0A> >> X710 is 10G and the XL710 is 40G because XL is 40 in = Roman numerals.)=0A> >>=0A> >>=0A> http://www.colfaxdirect.com/store/pc/vie= wPrd.asp?idproduct=3D2227&idcategory=3D0=0A> >>=0A> >> (I've never bought f= rom Colfax, but they carry a lot of "enterprise"=0A> >> equipment that isn'= t available on NewEgg/Amazon.)=0A> >>=0A> >> There are super-cheap optics a= nd twinax available from China. You may=0A> have=0A> >> to hack the Intel d= river since they're not "supported".=0A> >>=0A> >> http://www.fiberstore.co= m/c/10g-sfp+_63=0A> >> http://www.fiberstore.com/c/10g-sfp+-cables_1115=0A>= >>=0A> >> Or you could just get an account at the Snabb Lab.=0A> >>=0A> >>= --=0A> >> Wes Felter=0A> >> IBM Research - Austin=0A> >>=0A> >>=0A> >> ___= ____________________________________________=0A> >> Cerowrt-devel mailing l= ist=0A> >> Cerowrt-devel@lists.bufferbloat.net=0A> >> https://lists.bufferb= loat.net/listinfo/cerowrt-devel=0A> _______________________________________= ________=0A> Cerowrt-devel mailing list=0A> Cerowrt-devel@lists.bufferbloat= .net=0A> https://lists.bufferbloat.net/listinfo/cerowrt-devel=0A> ------=_20140909122603000000_28241 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

I agree with you if you ha= ve to install Cat6a and Cat7 structured wiring in a building! What a nightm= are trying to find contractors who can meet spec on junction boxes, etc. an= d do the right testing.  Every connector on the path is problematic.
But for "casual" home networking use or research lab experiments,= copper is fine.  That was my point.  I think in a "rack-scale" d= atascenter networking situation. probably better to go with fiber, but copp= er costs are attractive.

=0A

 

=0A

 

=0A=0A



On Tuesday, September 9, 2014 12:06am,= "Joel Wir=C4=81mu Pauling" <joel@aenertia.net> said:

= =0A
=0A

> Note I know wh= ilst you are talking copper. IME 10Gbit copper is
> nothing but a h= assle. You are lucky to get 30Metres out of a run
> without Negotia= tion issues.
>
> I encourage you strongly to look to using= Optical LX style fibre if
> you are moving to 10G. The cost of str= uctured cabling and the length
> of runs is a lot cheaper than Cat6= a/7 runs needed for 10gbit copper.
>
> On 9 September 2014= 16:03, Joel Wir=C4=81mu Pauling <joel@aenertia.net>
> wrote:=
> > Just a head's up I have had issues with the X5xx intel SFP+= optics
> > interoperating with other vendors. This may not be a= n issue for your
> > deployment.
> >
> > I= f you want good interop then Broadcom based optics seem to be the
>= > best bet at the moment.
> >
> > On 9 September = 2014 12:09, Wes Felter <wmf@felter.org> wrote:
> >> The= Intel X710 just came out today; it's a little cheaper. (Note that the
> >> X710 is 10G and the XL710 is 40G because XL is 40 in Roman n= umerals.)
> >>
> >>
> http://www.colfax= direct.com/store/pc/viewPrd.asp?idproduct=3D2227&idcategory=3D0
&g= t; >>
> >> (I've never bought from Colfax, but they car= ry a lot of "enterprise"
> >> equipment that isn't available = on NewEgg/Amazon.)
> >>
> >> There are super-ch= eap optics and twinax available from China. You may
> have
>= ; >> to hack the Intel driver since they're not "supported".
>= ; >>
> >> http://www.fiberstore.com/c/10g-sfp+_63
= > >> http://www.fiberstore.com/c/10g-sfp+-cables_1115
> &g= t;>
> >> Or you could just get an account at the Snabb Lab= .
> >>
> >> --
> >> Wes Felter> >> IBM Research - Austin
> >>
> >>= ;
> >> _______________________________________________
&= gt; >> Cerowrt-devel mailing list
> >> Cerowrt-devel@li= sts.bufferbloat.net
> >> https://lists.bufferbloat.net/listin= fo/cerowrt-devel
> _______________________________________________<= br />> Cerowrt-devel mailing list
> Cerowrt-devel@lists.bufferbl= oat.net
> https://lists.bufferbloat.net/listinfo/cerowrt-devel
>

=0A
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