From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp81.iad3a.emailsrvr.com (smtp81.iad3a.emailsrvr.com [173.203.187.81]) (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 714E421F530 for ; Wed, 10 Sep 2014 12:31:11 -0700 (PDT) Received: from localhost (localhost.localdomain [127.0.0.1]) by smtp3.relay.iad3a.emailsrvr.com (SMTP Server) with ESMTP id 9F2EE300ADD; Wed, 10 Sep 2014 15:31:09 -0400 (EDT) X-Virus-Scanned: OK Received: from app4.wa-webapps.iad3a (relay-webapps.rsapps.net [172.27.255.140]) by smtp3.relay.iad3a.emailsrvr.com (SMTP Server) with ESMTP id 740A5300A61; Wed, 10 Sep 2014 15:31:09 -0400 (EDT) X-Sender-Id: dpreed@reed.com Received: from app4.wa-webapps.iad3a (relay-webapps.rsapps.net [172.27.255.140]) by 0.0.0.0:25 (trex/5.2.10); Wed, 10 Sep 2014 19:31:09 GMT Received: from reed.com (localhost.localdomain [127.0.0.1]) by app4.wa-webapps.iad3a (Postfix) with ESMTP id 60243280025; Wed, 10 Sep 2014 15:31:09 -0400 (EDT) Received: by apps.rackspace.com (Authenticated sender: dpreed@reed.com, from: dpreed@reed.com) with HTTP; Wed, 10 Sep 2014 15:31:09 -0400 (EDT) Date: Wed, 10 Sep 2014 15:31:09 -0400 (EDT) From: dpreed@reed.com To: "Dave Taht" MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_20140910153109000000_42747" Importance: Normal X-Priority: 3 (Normal) X-Type: html In-Reply-To: References: Message-ID: <1410377469.392315248@apps.rackspace.com> X-Mailer: webmail7.0 Cc: Wes Felter , =?utf-8?Q?Joel_Wir=C4=81mu_Pauling?= , "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: Wed, 10 Sep 2014 19:31:39 -0000 ------=_20140910153109000000_42747 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =0AI'm confused....=0A =0ASFP is not SFP+. SFP carries at most 4.25 Gb/se= c. SFP+ works at >10 Gb/sec. So, it's not clear that the MikroTik is ve= ry useful in a 10 Gig world. It's not immediately clear but VERY likely, t= hat this is an "edge switch" that is intended for collapsing the GigE coppe= r traffic onto a potentially bottlenecked GigE "local backbone".=0A =0AOf c= ourse if you want to go from GigE fiber to GigE copper, that board might be= useful.=0A=0A=0AOn Wednesday, September 10, 2014 2:05pm, "Dave Taht" said:=0A=0A=0A=0A> On Wed, Sep 10, 2014 at 12:01 AM, Mikae= l Abrahamsson =0A> wrote:=0A> =0A> > I don't like when pe= ople create their cable plant to match what GPON needs.=0A> > It's done bec= ause of the illusion that long-haul fiber is expensive. It=0A> > isn't, if = you have to dig anyway. The difference in cost of a 12 fiber=0A> > cable, a= nd a 1000 fiber cable, isn't huge compared to the digging costs.=0A> > Spli= cing a 1000 fiber cable isn't huge either. Point-to-point fiber cabling=0A>= > is the way to go. If you then decide to light it up using PON of some ki= nd,=0A> > fine, that's up to you, at least you have the flexibility to chan= ge=0A> > technology in the future.=0A> >=0A> >> and several costs there hav= e dropped significantly, routerboard is=0A> >> making a SFP+ capable=0A> >>= 5 port switch for like 50 dollars=0A> >=0A> >=0A> > URL?=0A> =0A> Nick wea= ver (of ICSI) just turned me onto them -=0A> =0A> http://www.cloudrouterswi= tches.com/RB260GS.asp?gclid=3DCj0KEQjw7b-gBRC45uLY_avSrdgBEiQAD3Olx8_iFXJ_x= KjZInc2T54XEu5VyMsTe42Rla3GTRKrkwwaAu2M8P8HAQ=0A> =0A> He also steered me t= o a nifty port mirroring POE passthrough device:=0A> =0A> http://www.dual-c= omm.com/gigabit_port-mirroring-LAN_switch.htm=0A> =0A> Haven't tried either= yet, personally.=0A> =0A> It turns out that both he and I are using the ne= arly same model nucs=0A> for load testing, with a standard 2.5inch sata 3 s= lot, and 2 mini pcie=0A> slots for a half length and full length wifi devic= e.=0A> =0A> "The D54250WYK1, which is a dual core, dual thread/core i5 base= d with=0A> 16 GB Ram and a 120 GB SSD). The only disadvantage is it doesn't= =0A> include the "Vpro" lights out management suite present in the 3rd gen= =0A> model."=0A> =0A> I am using the i3 versions. I'd written up a review o= f the one without=0A> the 2.5 inch slot here:=0A> =0A> http://snapon.lab.bu= fferbloat.net/~cero2/nuc-to-puck/results.html=0A> =0A> and later upgraded t= o the one with the slot, as sata is faster than=0A> msata, and the best wif= i (atheros ath9k and ath10k) cards are all full=0A> length).=0A> =0A> These= have e1000e cards in them, which support BQL under linux 3.6 and=0A> later= , and although the (i3 at least) can't drive gigE to saturation=0A> without= TSO, they have been quite nice and quite quiet so far, and=0A> have been g= iving solid results. They are a really good desktop, too,=0A> under linux, = and mounting them on the back of the monitor (or, as I=0A> do, on a pegboar= d), is helpful too.=0A> =0A> =0A> >=0A> > --=0A> > Mikael Abrahamsson email= : swmike@swm.pp.se=0A> =0A> =0A> =0A> --=0A> Dave T=C3=A4ht=0A> =0A> https:= //www.bufferbloat.net/projects/make-wifi-fast=0A> ------=_20140910153109000000_42747 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

I'm confused....

=0A

 

=0A

SFP is not SFP+.   SFP car= ries at most 4.25 Gb/sec.   SFP+ works at >10 Gb/sec.   So, it= 's not clear that the MikroTik is very useful in a 10 Gig world.  It's= not immediately clear but VERY likely, that this is an "edge switch" that = is intended for collapsing the GigE copper traffic onto a potentially bottl= enecked GigE "local backbone".

=0A

 

=0A

Of course if you want to go from GigE fiber to GigE copper, that b= oard might be useful.

=0A=0A



On Wednesday, September 10= , 2014 2:05pm, "Dave Taht" <dave.taht@gmail.com> said:

=0A

=0A

> On Wed, Sep 1= 0, 2014 at 12:01 AM, Mikael Abrahamsson <swmike@swm.pp.se>
> = wrote:
>
> > I don't like when people create their cabl= e plant to match what GPON needs.
> > It's done because of the i= llusion that long-haul fiber is expensive. It
> > isn't, if you = have to dig anyway. The difference in cost of a 12 fiber
> > cab= le, and a 1000 fiber cable, isn't huge compared to the digging costs.
= > > Splicing a 1000 fiber cable isn't huge either. Point-to-point fib= er cabling
> > is the way to go. If you then decide to light it = up using PON of some kind,
> > fine, that's up to you, at least = you have the flexibility to change
> > technology in the future.=
> >
> >> and several costs there have dropped sig= nificantly, routerboard is
> >> making a SFP+ capable
&g= t; >> 5 port switch for like 50 dollars
> >
> >=
> > URL?
>
> Nick weaver (of ICSI) just turned= me onto them -
>
> http://www.cloudrouterswitches.com/RB2= 60GS.asp?gclid=3DCj0KEQjw7b-gBRC45uLY_avSrdgBEiQAD3Olx8_iFXJ_xKjZInc2T54XEu= 5VyMsTe42Rla3GTRKrkwwaAu2M8P8HAQ
>
> He also steered me to= a nifty port mirroring POE passthrough device:
>
> http:/= /www.dual-comm.com/gigabit_port-mirroring-LAN_switch.htm
>
&g= t; Haven't tried either yet, personally.
>
> It turns out = that both he and I are using the nearly same model nucs
> for load = testing, with a standard 2.5inch sata 3 slot, and 2 mini pcie
> slo= ts for a half length and full length wifi device.
>
> "The= D54250WYK1, which is a dual core, dual thread/core i5 based with
>= 16 GB Ram and a 120 GB SSD). The only disadvantage is it doesn't
>= include the "Vpro" lights out management suite present in the 3rd gen
> model."
>
> I am using the i3 versions. I'd written = up a review of the one without
> the 2.5 inch slot here:
> =
> http://snapon.lab.bufferbloat.net/~cero2/nuc-to-puck/results.htm= l
>
> and later upgraded to the one with the slot, as sata= is faster than
> msata, and the best wifi (atheros ath9k and ath10= k) cards are all full
> length).
>
> These have e1= 000e cards in them, which support BQL under linux 3.6 and
> later, = and although the (i3 at least) can't drive gigE to saturation
> wit= hout TSO, they have been quite nice and quite quiet so far, and
> h= ave been giving solid results. They are a really good desktop, too,
&g= t; under linux, and mounting them on the back of the monitor (or, as I
> do, on a pegboard), is helpful too.
>
>
> &= gt;
> > --
> > Mikael Abrahamsson email: swmike@swm.p= p.se
>
>
>
> --
> Dave T=C3=A4ht=
>
> https://www.bufferbloat.net/projects/make-wifi-fast>

=0A
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