From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ob0-x231.google.com (mail-ob0-x231.google.com [IPv6:2607:f8b0:4003:c01::231]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 9C27021F42F for ; Thu, 11 Sep 2014 08:30:53 -0700 (PDT) Received: by mail-ob0-f177.google.com with SMTP id wp4so1431980obc.36 for ; Thu, 11 Sep 2014 08:30:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=qJo4M0Z7BNrLZqjRCd/LToorwov2bz8vobK9bYJQfxM=; b=Q83spmYoCvMQQO7v5uPw9RDIlxOe6LXxl/0MoJbi9M67/eL3XY8fFGuP+PeTaZcx9e gK4k0E0dHl83G1pgN6NeNcd6bmTOBG4+/QyRzaYa98qK6w1Zu7/IxxqkL7uY4Loa1qUU A9U7hXRWxmQGnT/5BCopPrEt4MtDVzx+Btj7w/PchA2mFjgShpt3A/B0mxVdZvKYzi72 iU/l2pFOKUlW1kqLO3Jwk/8rEasii7OKLz62EAimDIODrHuZK0JzF0S5BWQbPWqBwS3Z 3o6vCYIZmpl0B78DL77yE/zKFccjphoW92h8ulPHiordZJ4L7aGrxo2Thvahxa/J3nhS sfWw== MIME-Version: 1.0 X-Received: by 10.60.65.135 with SMTP id x7mr1952945oes.45.1410449452342; Thu, 11 Sep 2014 08:30:52 -0700 (PDT) Received: by 10.202.227.76 with HTTP; Thu, 11 Sep 2014 08:30:52 -0700 (PDT) In-Reply-To: <1410377469.392315248@apps.rackspace.com> References: <1410377469.392315248@apps.rackspace.com> Date: Thu, 11 Sep 2014 08:30:52 -0700 Message-ID: From: Dave Taht To: David Reed Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: Wes Felter , =?UTF-8?Q?Joel_Wir=C4=81mu_Pauling?= , "cerowrt-devel@lists.bufferbloat.net" Subject: Re: [Cerowrt-devel] 10GigE nics and SFP+ modules? 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: Thu, 11 Sep 2014 15:31:21 -0000 On Wed, Sep 10, 2014 at 12:31 PM, wrote: > I'm confused.... > > > > SFP is not SFP+. SFP carries 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 bottlenecked GigE "local backbone". Yes. And as such it's the cheapest I've ever seen. You can find slightly la= rger, rack mount SFP capable switches, but nothing in this form factor that I kno= w of exists. > Of course if you want to go from GigE fiber to GigE copper, that board mi= ght > be useful. In my case, I ended up trying to figure out what the costs would be for 1G FTTY, which is a run of about 200 meters. This could be a welcome change from the current 6 hop wifi mesh network in place to get to the internet from where I sit. As fond as I am of wifi, even with having high hopes to improve it further, sometimes a cable is just better. This was a wonderfully wide-ranging conversation overall, along the way I learned about the differences between SFP, SFP+, and GSFTP, how to crimp and run cables, and many of the relevant costs involved at every layer in doing it... thank you all for sharing your knowledge! In my life I've punched holes in coax, run arcnet, climbed mountains and tall buildings to run wifi P2P links and cut and crimped more twisted pair than I care to remember, but my exposure to fiber's methods has been sadly limited, til now. I still don't quite have a grip on how and when to use various forms of cwdm or what wavelengths make the most sense, when... --=20 Dave T=C3=A4ht https://www.bufferbloat.net/projects/make-wifi-fast