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<div class="moz-cite-prefix">SDN is a big deal, everyone thinks it's
going to make their lives easier. Eventually, but not without
pain. There is enough hype I'm delving heavily into this now.<br>
<br>
Most of this concept of defined network is "contracts", this group
of hosts to that group of hosts on x services. Hosts technically
aren't in a broadcast domain anymore like they were, if you don't
define the port-to-port flow as part of a contract policy, it
doesn't happen.<br>
<br>
There in lies the problem - do you want to tell me every port
connection every host needs explicitly for every application? Now
you have to, as well as your bandwidth and latency requirements.
Yes, really, and no "any" isn't good enough.<br>
<br>
As a network person, getting app people to define their networking
requirements is about as impossible as pleasing them for the same
reason. Do you know how to read the results of "netstat -anp"?<br>
<br>
There is lots of open or open-ish hardware out there now to do
some very neat things right now. Openstack neutron to an
opendaylight controller, running hardware switches in openflow
mode (even cisco's can do openflow mode). There are a ton of open
and closed source SDN controllers, Cisco, Arista, Juniper, really
everyone has one, or has partnerships for one. VMware's NSX
product is all about SDN flow controllers and distributed network
features.<br>
<br>
As for hardware, commodity stuff is starting to be found cheap:<br>
<br>
<a class="moz-txt-link-freetext" href="http://www.ebay.com/itm/Accton-Edge-Core-Data-Center-Switch-AS5600-52X-48-port-10GBE-4x-40GBE-QSFP-/151754552764">http://www.ebay.com/itm/Accton-Edge-Core-Data-Center-Switch-AS5600-52X-48-port-10GBE-4x-40GBE-QSFP-/151754552764</a>?<br>
<br>
Used, a thousand bucks, 48x 10gigabit ports, 4x 40gigabit ports,
runs cumulus linux as the switch os. Anything that can do
OpenNetworking (ON) support, which Dell, Quanta, and a number of
other generic "white-box" providers do this now.<br>
<br>
Now almost every switch is based on broadcom chips, even cisco
doesn't do much for custom silicon asics anymore, so there is a
baseline compatibility with a lot of hardware now being all
broadcom reference chipsets like that Accton through big names.
Cisco and Arista's premier products are all broadcom based now,
only difference is how they stitch the chips together internally,
and the software. Facebook did this with the same broadcom chips
themselves as with every random chinese company cloning the same
approach from the bigwigs like that Accton and undercutting price,
why not Facebook themselves?<br>
<br>
The final frontier for data center networking of who you buy will
be more about the software api, and how expressive they can convey
network hardware and transport concepts to non-networking
developers, including global site concepts, vpn, load-balancing,
ssl termination, dns, and extensive routing/switching. <br>
<br>
It doesn't remove complexity, it just makes it something else's
problem, again.<br>
<br>
-mb<br>
<br>
<br>
On 07/25/2015 10:36 PM, Stephen Partington wrote:<br>
</div>
<blockquote
cite="mid:CACS_G9w_L9ZpEphFYKpS9YMC9EADMYA6Hr92XOgUbxcuasuw1g@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_default" style="font-family:trebuchet
ms,sans-serif">Saw this post wander by, and was wondering what
some of your takes would be.</div>
<div class="gmail_default" style="font-family:trebuchet
ms,sans-serif"><br>
</div>
<div class="gmail_default" style="font-family:trebuchet
ms,sans-serif">I for one am a huge supporter in the idea of
opensource networking infrastructure. but also the idea of a
network that is even more modular...</div>
<div class="gmail_default" style="font-family:trebuchet
ms,sans-serif"><br>
</div>
<div class="gmail_default" style="font-family:trebuchet
ms,sans-serif">
<p style="margin:0px 0px
6px;color:rgb(20,24,35);font-family:helvetica,arial,sans-serif;font-size:14px;line-height:19.3199996948242px">=========================</p>
<p style="margin:6px
0px;color:rgb(20,24,35);font-family:helvetica,arial,sans-serif;font-size:14px;line-height:19.3199996948242px">World
waves 'goodbye' to CISCO!</p>
<p style="margin:6px
0px;color:rgb(20,24,35);font-family:helvetica,arial,sans-serif;font-size:14px;line-height:19.3199996948242px">With
new generation of Debian/UBUNTU GNU/Linux switches, coming
with full sources for <a moz-do-not-send="true"
class="_58cn"
href="https://www.facebook.com/hashtag/sdn?source=feed_text&story_id=10203152126003649"
style="color:rgb(59,89,152);text-decoration:none"><span
class="_58cl" style="color:rgb(98,122,173)">#</span><span
class="_58cm">SDN</span></a> (Software Defined
Networking).</p>
<p style="margin:6px
0px;color:rgb(20,24,35);font-family:helvetica,arial,sans-serif;font-size:14px;line-height:19.3199996948242px">After <a
moz-do-not-send="true" class="_58cn"
href="https://www.facebook.com/hashtag/snowden?source=feed_text&story_id=10203152126003649"
style="color:rgb(59,89,152);text-decoration:none"><span
class="_58cl" style="color:rgb(98,122,173)">#</span><span
class="_58cm">Snowden</span></a>/ <a
moz-do-not-send="true" class="_58cn"
href="https://www.facebook.com/hashtag/nsa?source=feed_text&story_id=10203152126003649"
style="color:rgb(59,89,152);text-decoration:none"><span
class="_58cl" style="color:rgb(98,122,173)">#</span><span
class="_58cm">NSA</span></a> revelations nobody in the
world is buying U.S. closed software/hardware any longer.</p>
<p style="margin:6px
0px;color:rgb(20,24,35);font-family:helvetica,arial,sans-serif;font-size:14px;line-height:19.3199996948242px">Large
parts of Linux now run on ultra fast, freely programmable
ASICs, being able to completely replace CISCO greenware.</p>
<p style="margin:6px
0px;color:rgb(20,24,35);font-family:helvetica,arial,sans-serif;font-size:14px;line-height:19.3199996948242px">But
not only that. You now can run your UBUNTU "Snappy"
containers directly on your switches. No more dedicated
servers. Oops?</p>
<p style="margin:6px
0px;color:rgb(20,24,35);font-family:helvetica,arial,sans-serif;font-size:14px;line-height:19.3199996948242px">Wave
'goodbye' to John Chambers at Levi’s Stadium on July 27 with
some handful of <a moz-do-not-send="true" class="_58cn"
href="https://www.facebook.com/hashtag/cisco?source=feed_text&story_id=10203152126003649"
style="color:rgb(59,89,152);text-decoration:none"><span
class="_58cl" style="color:rgb(98,122,173)">#</span><span
class="_58cm">Cisco</span></a> employees, that are left
over: <a moz-do-not-send="true" class="_58cn"
href="https://www.facebook.com/hashtag/ciscorocks?source=feed_text&story_id=10203152126003649"
style="color:rgb(59,89,152);text-decoration:none"><span
class="_58cl" style="color:rgb(98,122,173)">#</span><span
class="_58cm">CiscoRocks</span></a> and<a
moz-do-not-send="true" class="_58cn"
href="https://www.facebook.com/hashtag/wearecisco?source=feed_text&story_id=10203152126003649"
style="color:rgb(59,89,152);text-decoration:none"><span
class="_58cl" style="color:rgb(98,122,173)">#</span><span
class="_58cm">WeAreCisco</span></a>.</p>
<p style="margin:6px
0px;color:rgb(20,24,35);font-family:helvetica,arial,sans-serif;font-size:14px;line-height:19.3199996948242px"><a
moz-do-not-send="true"
href="https://insights.ubuntu.com/2015/06/18/worlds-first-25100-gigabit-open-ethernet-based-switch-launches/"
target="_blank" rel="nofollow"
style="color:rgb(59,89,152);text-decoration:none">https://insights.ubuntu.com/…/worlds-first-25100-gigabit-o…/</a></p>
<p style="margin:6px
0px;color:rgb(20,24,35);font-family:helvetica,arial,sans-serif;font-size:14px;line-height:19.3199996948242px"><a
moz-do-not-send="true"
href="https://insights.ubuntu.com/2015/05/13/iot-world-snappy-for-whitebox-switches/"
target="_blank" rel="nofollow"
style="color:rgb(59,89,152);text-decoration:none">https://insights.ubuntu.com/…/iot-world-snappy-for-whitebo…/</a></p>
<p style="margin:6px
0px;color:rgb(20,24,35);font-family:helvetica,arial,sans-serif;font-size:14px;line-height:19.3199996948242px"><a
moz-do-not-send="true"
href="https://insights.ubuntu.com/2015/05/18/lxd-crushes-kvm-in-density-and-speed/"
target="_blank" rel="nofollow"
style="color:rgb(59,89,152);text-decoration:none">https://insights.ubuntu.com/…/lxd-crushes-kvm-in-density-a…/</a></p>
<p style="margin:6px
0px;color:rgb(20,24,35);font-family:helvetica,arial,sans-serif;font-size:14px;line-height:19.3199996948242px"><a
moz-do-not-send="true"
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target="_blank" rel="nofollow"
style="color:rgb(59,89,152);text-decoration:none">https://insights.ubuntu.com/…/the-power-of-software-define…/</a></p>
<p style="margin:6px
0px;color:rgb(20,24,35);font-family:helvetica,arial,sans-serif;font-size:14px;line-height:19.3199996948242px"><a
moz-do-not-send="true"
href="https://www.facebook.com/l.php?u=https%3A%2F%2Finsights.ubuntu.com%2F2015%2F07%2F01%2Fjuju-for-telcos-and-service-providers-pt-1-2%2F&h=hAQH4fSmGAQGHgaT6_nHiXaesz7tWpvCZeli3jwKhE8_ALA&enc=AZOPRSCdIOH8TKworlVEJd4daQoj7O0OC4lBzrmX8WJmHJTWpkKLocYQVvgchsK7z4Y-wHkxAdySwz7ntOOXEba_2JAi6M0H-CNLp930lYJvR5YEszrYtwtDMIUBJzJk7HaDJWS2lYNwNfAGq4Q09Wro272ELQijVTh13YHx6z1UQr9p1B8vy9CzZOocoI1pTSM&s=1"
target="_blank" rel="nofollow"
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<p style="margin:6px
0px;color:rgb(20,24,35);font-family:helvetica,arial,sans-serif;font-size:14px;line-height:19.3199996948242px"><a
moz-do-not-send="true"
href="https://www.facebook.com/l.php?u=https%3A%2F%2Finsights.ubuntu.com%2F2015%2F02%2F26%2Fjuniper-canonical-partner-on-openstack-cloud-solutions-for-telcos%2F&h=5AQHcPpPeAQFb_xtgfuDJqVWaBN_Lz-aGnY8VbHtudGRfLA&enc=AZNxSa0FMDFu19nbygu9CirNwkXSG1L5X6tA3hfmQwlCkqGUg1CWtHpf1kmmoDaFHdug0LY5F1jznSVTNF02TMv2iw9sjtoykRmBVzvXiFc5psCQvQfrbu50nOjfBRIBmpJ9UiD6fZKjbPHdfGro_fXGz_JKe-nfsHkmvRJOy-90hUQw53vuipSMBA3o9GL5rHY&s=1"
target="_blank" rel="nofollow"
style="color:rgb(59,89,152);text-decoration:none">https://insights.ubuntu.com/…/juniper-canonical-partner-on…/</a></p>
<p style="margin:6px 0px
0px;display:inline;color:rgb(20,24,35);font-family:helvetica,arial,sans-serif;font-size:14px;line-height:19.3199996948242px"><a
moz-do-not-send="true"
href="https://code.facebook.com/posts/843620439027582/facebook-open-switching-system-fboss-and-wedge-in-the-open/"
style="color:rgb(59,89,152);text-decoration:none">https://code.facebook.com/…/facebook-open-switching-system…/</a></p>
<br>
</div>
<div class="gmail_default" style="font-family:trebuchet
ms,sans-serif"><br>
</div>
<div class="gmail_default" style="font-family:trebuchet
ms,sans-serif"><br>
</div>
<div><br>
</div>
-- <br>
<div class="gmail_signature">A mouse trap, placed on top of your
alarm clock, will prevent you from rolling over and going back
to sleep after you hit the snooze button.<br>
<br>
Stephen<br>
<br>
</div>
</div>
<br>
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