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    <title>Data Center Networks</title>
    <link>http://blogs.cisco.com/datacenter</link>
     <description>Discussion of Networking&#45;Based Technologies Designed to Optimize Data Centers</description>
    <dc:language>en</dc:language>
    <dc:creator>osultan@cisco.com</dc:creator>
    <dc:rights>Copyright 2009</dc:rights>
    <dc:date>2009-11-13T08:07:24+00:00</dc:date>
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    <item>
      <title>Why Standards Matter&#8230;And When They Don&#8217;t</title>
      <link>http://blogs.cisco.com/datacenter/comments/why_standards_matter...and_when_they_dont/</link>
      <guid>http://blogs.cisco.com/datacenter/comments/why_standards_matter...and_when_they_dont/</guid>
       <description><![CDATA[<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica;"><span style="letter-spacing: 0.0px;">The year was 1992, Disney&rsquo;s <a href="http://www.imdb.com/title/tt0103639/">Aladdin</a> was the top grossing movie, <a href="http://www.garthbrooks.com/">Garth Brooks</a> had the top-selling album in the US, and I was a freshly minted SE.&nbsp; Being a studious and diligent SE, I read up on all the gear sold by the integrator I worked for, and I decided that the Wellfleet BCN was the product of choice for our customers based on its hardware architecture and the impressive list of standards to which it laid claim.</span></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px;"><span style="letter-spacing: 0.0px;">&nbsp;</span></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica;"><span style="letter-spacing: 0.0px;">And, then a funny thing happened&#8230;I learned that, while customers value standards compliance, what they value even more are networks that work and do what they need them to do.&nbsp; And herein lies the inherent contradiction of networking standards and the constant tension between innovation and standards.</span></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px;"><span style="letter-spacing: 0.0px;">&nbsp;</span></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica;"><span style="letter-spacing: 0.0px;">Ultimately customers look to us to address their problems: &ldquo;I need my network to _________ (fill in the blank) so I can support the needs of my business&#8212;oh, and I&rsquo;d like that ASAP, please&rdquo; .&nbsp; Luckily, our customer base is not shy, so when we see a trend, we move to address it and put solutions out there for our customers.&nbsp; This is where innovation is critical&#8212;having the ability to continually move the ball forward to ensure networking continues to meet the needs of markets that are themselves continually evolving. &nbsp;</span></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px;"><span style="letter-spacing: 0.0px;">&nbsp;</span></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica;"><span style="letter-spacing: 0.0px;">But, ultimately, standardization is the end goal.&nbsp; Without standardization, innovation cannot scale.&nbsp; Time and again, we have seen that if a technology is balkanized, it stalls because no one wants to choose poorly (on a somewhat related note, I have a fine collection of HD-DVDs I&rsquo;m willing to part with at a fair price).</span></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px;"><span style="letter-spacing: 0.0px;">&nbsp;</span></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica;"><span style="letter-spacing: 0.0px;">Most of you are probably familiar with some version of the technology adoption lifecycle chart below, made popular by <a href="http://www.tcg-advisors.com/who/moore.htm">Geoffrey Moore</a> in his seminal work &ldquo;<a href="http://en.wikipedia.org/wiki/Crossing_the_Chasm">Crossing the Chasm</a>&rdquo;.</span></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px;"><span style="letter-spacing: 0.0px;">&nbsp;</span></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica;"><img src="/upload/images/datacenter/blog.jpg" alt="" width="420" height="315" /></p>]]></description>
      <dc:subject></dc:subject>
      <dc:date>2009-11-13T08:07:24+00:00</dc:date>
    </item>

    <item>
      <title>New Book Published from Cisco IT</title>
      <link>http://blogs.cisco.com/datacenter/comments/new_book_published_from_cisco_it/</link>
      <guid>http://blogs.cisco.com/datacenter/comments/new_book_published_from_cisco_it/</guid>
       <description><![CDATA[<p>Not sure if you&#8217;ve seen it yet but a <a href="http://www.ciscopress.com/bookstore/product.asp?isbn=1587058138">great book</a> for anybody trying to define what a &#8220;Green&#8221; data center means and take steps towards migrating to one.&nbsp; I&#8217;ve known <a href="http://www.ciscopress.com/authors/bio.asp?a=03e7355e-c009-4820-9f0f-406e1d6e9f14">Doug Alger</a> for about 4 years now, he is a Solutions Architect within <a href="http://www.cisco.com/web/about/ciscoitatwork/index.html">Cisco IT</a>.&nbsp; Doug does is a rare breed, he has a strong facilities background but is employed by an IT operation.&nbsp; Doug often jokes that if Facilities and IT departments had no issues in planning and management, his job would go away.&nbsp; I was privileged to provide technical editing for this book and from what I know in the industry, I believe it is the best work today in providing a resource base to build upon.</p>
<p><img src="/upload/images/Alger.png" alt="" width="81" height="81" /><img src="/upload/images/Alger_Book.png" alt="" width="486" height="600" /></p>
<p>Since there is no such thing as a Green Data Center today (in a purist sense), this book addresses what steps you can take and what standards are their to move towards one.&nbsp; This is a great book to not just read once but refer back to in building your plan.</p>]]></description>
      <dc:subject></dc:subject>
      <dc:date>2009-11-12T19:44:07+00:00</dc:date>
    </item>

    <item>
      <title>Every cloud needs a net</title>
      <link>http://blogs.cisco.com/datacenter/comments/every_cloud_needs_a_net/</link>
      <guid>http://blogs.cisco.com/datacenter/comments/every_cloud_needs_a_net/</guid>
       <description><![CDATA[<p>Most enterprises have been exploring cloud computing to see how it might work for them.&nbsp; Cloud computing offers the ability to run servers on the Internet on demand.&nbsp; The storage, compute, and network functions are positioned and ready for use, so servers can be deployed within minutes, and paid for only for as long as they are in use.</p>
<p>An essential component of any cloud installation is its network.&nbsp;&nbsp; When servers are deployed in a cloud, they need an external network to be usable.&nbsp; The network services that they need are more than simple IP connectivity, and each customer of the cloud will need some customization.&nbsp; Here are some key types of cloud network service.</p>]]></description>
      <dc:subject></dc:subject>
      <dc:date>2009-11-06T21:12:15+00:00</dc:date>
    </item>

    <item>
      <title>Virtual Computing Environment  coalition &#45;Can you list the benefits for your company ?</title>
      <link>http://blogs.cisco.com/datacenter/comments/virtual_computing_environment_coalition_-can_you_list_the_benefits_for_your/</link>
      <guid>http://blogs.cisco.com/datacenter/comments/virtual_computing_environment_coalition_-can_you_list_the_benefits_for_your/</guid>
       <description><![CDATA[<p>You probably didn&#8217;t miss the today <a href="http://newsroom.cisco.com/dlls/2009/corp_110309.html">announcement </a>of the coalition &nbsp;between Cisco, EMC and VMware designed to address the challenges of pervasive virtualization and private cloud computing .We met Mark Fulgham , Vice-President Data Center Solutions to get his point of view on the Virtual Computing Environment coalition , on the Vblock Infrastructure Packages approach&nbsp;.In this short extract , Mark&nbsp;Fulgham describes some of the benefits he sees for&nbsp;our customers.&nbsp;</p>
<p>&nbsp;</p>
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<p>We also invite two customers, a CIO and a CTO to share their analysis&nbsp;of the Vblock Infrastructure Packages approach &nbsp;</p>]]></description>
      <dc:subject></dc:subject>
      <dc:date>2009-11-04T00:11:57+00:00</dc:date>
    </item>

    <item>
      <title>Wishful Thinking: The Innovation Edition</title>
      <link>http://blogs.cisco.com/datacenter/comments/wishful_thinking_the_innovation_edition/</link>
      <guid>http://blogs.cisco.com/datacenter/comments/wishful_thinking_the_innovation_edition/</guid>
       <description><![CDATA[<p><img src="/upload/images/datacenter/Fresh_Ideas_XSmall.jpg" alt="" width="283" height="424" /></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica;"><span style="letter-spacing: 0.0px;">I am an unabashed fan of social networking.&nbsp; For the data center team, being able to get direct, unfiltered feedback from the market has been a boon for making sure we are tracking in the right direction.&nbsp; I also thoroughly enjoy the online conversations on the various blogs and in Twitter.&nbsp; There are a great number of people out there with a lot of good thinking on the data center and I highly encourage you to do a little googling to get plugged into these conversations.&nbsp; There are folks out there with views diametrically opposed to mine (you know who you are) but they have well-reasoned, well-spoken opinions and you can&rsquo;t help but respect them for that&#8212;and I honestly enjoy the back-and-forth.</span></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px;"><span style="letter-spacing: 0.0px;">&nbsp;</span></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica;"><span style="letter-spacing: 0.0px;">And then I&rsquo;ll come across something that will leave me scratching my head thinking &ldquo;Really&#8230;that&rsquo;s the best you could come up with?&rdquo;&nbsp; I was reminded about this when I recently ran across a diatribe on our &ldquo;lack of innovation&rdquo;.&nbsp; So, as a company, I will readily admit that there are a number of things we need to work on (and are), but &ldquo;lack of innovation&rdquo;? Really?</span></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px;"><span style="letter-spacing: 0.0px;">&nbsp;</span></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica;"><span style="letter-spacing: 0.0px;">Let&rsquo;s deconstruct this a little bit.&nbsp; Just for the sake of argument, let&rsquo;s start with a definition.&nbsp; My trusty Mac dictionary defines &ldquo;innovate&rdquo; as &ldquo;<em>make changes in something established, esp. by introducing new methods, ideas, or products,</em>&rdquo; so lets run with that.&nbsp; So, what have we done along these lines in the data center space in the last 20 months or so (not meaning to brag, just trying to make a point):&nbsp;</span></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px;"><span style="letter-spacing: 0.0px;">&nbsp;</span></p>]]></description>
      <dc:subject></dc:subject>
      <dc:date>2009-10-30T01:09:57+00:00</dc:date>
    </item>

    <item>
      <title>Could the Converged Network Adapter be the most important element in a Unified Fabric?</title>
      <link>http://blogs.cisco.com/datacenter/comments/could_the_converged_network_adapter_be_the_most_important_element_in_a_unif/</link>
      <guid>http://blogs.cisco.com/datacenter/comments/could_the_converged_network_adapter_be_the_most_important_element_in_a_unif/</guid>
       <description><![CDATA[<p>Many vendors are touting the benefits of IEEE DCB, FCoE, CEE, DCE, Unified Fabrics, and many other marketing monikers for equipment consolidation.&nbsp; Each component of the technology is interesting, but maybe no more so than the Converged Network Adapter itself.&nbsp;&nbsp; Why so?&nbsp; Let&rsquo;s take a look.</p>]]></description>
      <dc:subject></dc:subject>
      <dc:date>2009-10-23T16:07:31+00:00</dc:date>
    </item>

    <item>
      <title>Cisco Nexus 4001I Switch Module for IBM BladeCenter</title>
      <link>http://blogs.cisco.com/datacenter/comments/cisco_nexus_4001i_switch_module_for_ibm_bladecenter/</link>
      <guid>http://blogs.cisco.com/datacenter/comments/cisco_nexus_4001i_switch_module_for_ibm_bladecenter/</guid>
       <description><![CDATA[<p>On&nbsp;my previous blog post <a href="/datacenter/comments/so_what_exactly_is_a_nexus_4000_--_the_answer">&#8220;What exactly is a Nexus 4000?&#8221; </a>there were many questions/comments around OEM blade server vendors and details&nbsp;of Nexus 4000 Series Blade Switches . Today, <a href="http://www-01.ibm.com/common/ssi/ShowDoc.jsp?docURL=/common/ssi/rep_ca/5/877/ENUSZG09-0635/index.html&amp;ampbreadCrum=DET001PT022&amp;ampurl=buttonpressed=DET001PT116&amp;amppage=1000&amp;amppaneltext1=DET001PEF011&amp;ampuser+type=EXT&amp;amplang=en_GB&amp;ampInfoType=AN&amp;ampInfoSubType=CA&amp;ampInfoDesc=Announcement+Letters&amp;amppanelurl=index.wss%3Fbuttonpressed%3DDET001PT116%26page%3D1000%26paneltext1%3DDET001PEF011%26user%2Btype%3DEXT&amp;amppaneltext=Announcement%20letter%20search">IBM&nbsp;announced</a> the details of the Cisco Nexus 4000 blade switch for their BladeCenter H and HT chassis.</p>
<p>Nexus 4001 Switch Module for IBM BladeCenter will provide the support for <a href="http://www.fcoe.com/">Fiber Channel over Ethernet (FCoE)</a> and the emerging <a href="http://www.ieee802.org/1/pages/dcbridges.html">IEEE Data Center Bridging (DCB)</a> standards over 10 GbE for IBM Blade servers.</p>
<p>So IBM becomes the first blade server vendor to make Cisco Nexus 4000 available for their blade servers. You can find the Nexus 4000 blade switch IBM description at:</p>
<p><a href="http://www.redbooks.ibm.com/abstracts/tips0754.html">http://www.redbooks.ibm.com/abstracts/tips0754.html</a></p>
<p>and included in the IBM websites below:</p>
<p><a href="http://www-03.ibm.com/systems/bladecenter/hardware/openfabric/fcoe.html">http://www-03.ibm.com/systems/bladecenter/hardware/openfabric/fcoe.html</a></p>
<p><a href="http://www-03.ibm.com/systems/bladecenter/hardware/openfabric/ethernet.html">http://www-03.ibm.com/systems/bladecenter/hardware/openfabric/ethernet.html</a></p>
<p>and on the Cisco website:&nbsp; <a href="http://www.cisco.com/go/nexus4000">http://www.cisco.com/go/nexus4000</a></p>]]></description>
      <dc:subject></dc:subject>
      <dc:date>2009-10-21T00:27:58+00:00</dc:date>
    </item>

    <item>
      <title>Cisco IT Data Center Experience</title>
      <link>http://blogs.cisco.com/datacenter/comments/cisco_it_data_center_experience/</link>
      <guid>http://blogs.cisco.com/datacenter/comments/cisco_it_data_center_experience/</guid>
       <description><![CDATA[<p>You know, our customers, even folks that are not our customers, are always interested what Cisco IT is up to. &nbsp;Our IT strategy is intrinsic to our business strategy and folks are always curious to know what is working and what is not working. &nbsp;Now, if you have every been lucky enough to hear folks like Rebecca Jacoby or Sidney Morgan talk, you know our IT org is a big believer in transparency and will happily share both our successes and learning experiences. &nbsp;To that end, we have recently released the <a href="http://www.cisco.com/web/about/ciscoitatwork/data_center/flash/dc_experience/index.html?POSITION=coc&amp;COUNTRY_SITE=us&amp;CAMPAIGN=CoC_campaign&amp;CREATIVE=DCExperience+&amp;REFERRING_SITE=Vanity+URL">Cisco IT Data Center Experience</a>.</p>
<p><img src="/upload/images/datacenter/coc1.jpg" alt="" width="400" height="224" /></p>
<p>The website takes you behind the scenes of Cisco&#8217;s global data center environment with a chance to hear from the folks responsible for long-term planning and strategy, architecture and operations and implementation. &nbsp;There are over 30 videos on a broad range of topics&#8212;pretty much something for everyone.</p>
<p><img src="/upload/images/datacenter/coc2.jpg" alt="" width="400" height="223" /></p>]]></description>
      <dc:subject></dc:subject>
      <dc:date>2009-10-19T16:56:12+00:00</dc:date>
    </item>

    <item>
      <title>Government Agency Upgrades Application Infrastructure with a Virtualized App Delivery Solution</title>
      <link>http://blogs.cisco.com/datacenter/comments/government_agency_upgrades_application_infrastructure/</link>
      <guid>http://blogs.cisco.com/datacenter/comments/government_agency_upgrades_application_infrastructure/</guid>
       <description><![CDATA[<p>Government Agency Upgrades Application Infrastructure&hellip;and by doing so provides a great proof point of&nbsp; <a href="http://idcdocserv.com/788">why old load balancers should be virtualized</a>&nbsp; (source: IDC)&nbsp;.</p>
<p>Faced with challenges of an aging application infrastructure and needing to scale application delivery state&nbsp;wide with security and performance, the Delaware Department of Technology and Information (DTI) deployed the <a href="http://www.cisco.com/go/ace">industry&rsquo;s only virtualized application delivery solution</a>.</p>]]></description>
      <dc:subject></dc:subject>
      <dc:date>2009-10-16T16:21:48+00:00</dc:date>
    </item>

    <item>
      <title>Cisco UCS Gets the Nod From Oracle</title>
      <link>http://blogs.cisco.com/datacenter/comments/cisco_ucs_get_the_nod_from_oracle/</link>
      <guid>http://blogs.cisco.com/datacenter/comments/cisco_ucs_get_the_nod_from_oracle/</guid>
       <description><![CDATA[<p>So, we continue to see broad traction in the industry for the <a href="http://www.cisco.com/en/US/products/ps10265/index.html">Cisco Unified Computing System</a>. &nbsp;The latest passenger on the UCS Bus is Oracle, which recently <a href="http://linux.oracle.com/pls/apex/f?p=102:2:4228981851688408::NO::P2_VC_ID:496">certified and validated</a> the Cisco UCS platform for Oracle Enterprise Linux 5.3 and Oracle VM. &nbsp;</p>
<p><img src="/upload/images/datacenter/RAC.jpg" alt="" width="420" height="315" /></p>
<p>As the picture illustrates, the test system was built around out UCS <a href="http://www.cisco.com/en/US/products/ps10280/index.html">B-Series</a> servers with <a href="http://www.emc.com/products/family/clariion-family.htm">EMC CLARiiON</a> storage system with a mix of Fibre Channel drives and state- of-the-art<a href="http://www.emc.com/collateral/hardware/white-papers/h5967-leveraging-clariion-cx4-oracle-deploy-wp.pdf"> Enterprise Flash Drives</a> (EFDs) to further speed performance. &nbsp;Its important to note that, because the Cisco UCS is architecturally consistent across form factors, the same system could be built with the recently announced <a href="http://www.cisco.com/en/US/products/ps10493/index.html">C-Series</a> rack servers.</p>
<p>We have published a <a href="http://www.cisco.com/offer/oowucswp/183788_1">white paper</a> on the tested deployment that digs into a fair amount of detail on the setup and configuration of the system&#8212;highly encouraged reading for anyone that supports Oracle in an enterprise environment. &nbsp;Please note, you will need to register to access the doc (any follow-up from us is on an opt-in basis).</p>
<p>One of the more interesting things &nbsp;things that came out of the testing was the performance data. We ran the cluster through 24h hrs stress tests for both OLTP (order entry) and DSS (sales history). The results included:</p>
<ul>
<li>Very consistent CPU utilization: around 40 percent on all eight nodes</li>
<li>No saturation levels of any subsystems (CPU, disk, I/O, or networking)</li>
<li>Sustained FCoE-based I/O ranging between 1.8 and 2.0 GB per second, which could be further divided into 1.4 GB per second of Fibre Channel I/O and approximately 450 MB per second of interconnect communication</li>
<li>No occurrence of I/O bottlenecks or wait times</li>
<li>Excellent I/O service times for storage</li>
</ul>
<p>We attribute much of this consistency to the UCS architecture and its intrinsic 10GB fabric as well as the use of the EMC CLARiiON storage with EFDs. &nbsp;Note, this was not performance testing, there was no config optimization or the like done for this test, we were more interested in understanding how the system handled long-term sustained loads. &nbsp;We are working on performance benchmarking, so stay tuned for those if you are looking for numbers to compare to other solutions out there.</p>
<p>&nbsp;</p>]]></description>
      <dc:subject></dc:subject>
      <dc:date>2009-10-16T16:49:31+00:00</dc:date>
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