[180655] in North American Network Operators' Group
RE: 100G DWDM FEC standard
daemon@ATHENA.MIT.EDU (Gert Grammel)
Tue Jun 9 10:30:18 2015
X-Original-To: nanog@nanog.org
From: Gert Grammel <ggrammel@juniper.net>
To: Mikael Abrahamsson <swmike@swm.pp.se>
Date: Tue, 9 Jun 2015 14:24:32 +0000
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
Hi Mikael,
From a standards perspective keep in mind that http://www.stupi.se/Standard=
s/100G-long-haul4.pdf is not approved - but we are working hard on it. OTO=
H having a reference implementation at hand, is an accelerator that helps a=
lot.
Let me also add some color to your email as the current interoperability si=
tuation in WDM is quite funny. Sometimes transceivers of the same vendor ca=
n't talk to each other, as they are based on a different generation of ASIC=
s and therefore FEC implementations. In other words, vendors typically have=
more than only one secret sauce they cook with, and different sauces do no=
t blend well :-) . Perhaps transport folks are already too used to deal wi=
th such kind of issues that no one laments anymore. On the other hand perha=
ps, the networking industry is already so used to Ethernet where interopera=
bility is a no-brainer, that it is difficult to imagine what it means to de=
al with a technology that prevents multi-vendor interop.
To confirm your final point:
Interoperability is on the top of the shopping lists for the networking ind=
ustry.=20
Gert
email : ggrammel@juniper.net
---------------------------------------
Date: Fri, 5 Jun 2015 17:53:58 +0200 (CEST)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: nanog@nanog.org
Subject: 100G DWDM FEC standard
Message-ID: <alpine.DEB.2.02.1506051741330.9487@uplift.swm.pp.se>
Content-Type: TEXT/PLAIN; format=3Dflowed; charset=3DUS-ASCII
Hi,
I just watched the "evolution of ethernet speeds" presentation from NANOG=20
meeting. There was a statement that there was "vendor secret sauce" in the=
=20
100G DWDM space. Yes, that is true, but:
http://www.stupi.se/Standards/100G-long-haul4.pdf
There actually is a standard for 100G DWDM that has support from multiple=20
router vendors. When you buy new gear, make sure your vendors support the=20
above standard, so we can connect our routers over longer distances=20
between vendors, without needing transponders.
We in the Deutsche Telecom Terastream project have Huawei, Cisco, Juniper=20
and ALU routers that natively (DWDM colored interfaces in the routers)=20
talk directly to each other over 1500 km amplified DWDM system (no=20
transponders), and we can also talk from these routers interfaces to Cisco=
=20
and ALU transponders if we want to.
https://jeffloughridge.wordpress.com/2013/10/16/peter-lothbergs-terastream-=
presentation-at-ripe-67/=20
if you want to know more about the project.
Next time you purchase 100G DWDM equipment, make sure you buy equipment=20
that follows this standard to be certain that it interoperates to combat=20
vendor "secret sauce".
--=20
Mikael Abrahamsson email: swmike@swm.pp.se
