[193476] in North American Network Operators' Group
Re: Passive Optical Network (PON)
daemon@ATHENA.MIT.EDU (Leo Bicknell)
Mon Jan 23 12:15:22 2017
X-Original-To: nanog@nanog.org
Date: Mon, 23 Jan 2017 09:15:14 -0800
From: Leo Bicknell <bicknell@ufp.org>
To: nanog@nanog.org
Mail-Followup-To: nanog@nanog.org
In-Reply-To: <CACJNPZqxp4XeeP31N_pDTqav=xcsOjYJXRkVVtD2+BNnKEwDww@mail.gmail.com>
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In a message written on Sat, Jan 21, 2017 at 03:22:20PM -0600, Stas Bilder =
wrote:
> Now, to the projects.
> I have never heard of seen PON on a DC level.
A friend of mine told me of a fascinating in-data center PON solution.
He had a customer that needed high speed multicast fan-out. They
chose to use a 10G/1G PON solution, a single source node sending
10G PON with a 1G backchannel, 100% of the traffic was multicast.
It could be passively split in DC up to 128:1 with zero "packet
loss", good luck finding an Ethernet switch which can take in 10G
of multicast in and turn it into 1280G of multicast out without
dropping a frame. It was all done entirely inside of a single
data center.
Since then I've mentioned the trick to several other folks I know
who need high speed multicast/broadcast replication. In the DC
distance is rarely an issue, so the solution degenerates to special
SFP's and a splitter, which is pretty dang simple.
However, this is clearly a corner case, and I agree with your
assessment overall.
--=20
Leo Bicknell - bicknell@ufp.org
PGP keys at http://www.ufp.org/~bicknell/
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