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	<title>BRAD HEDLUND .com&#187; Design Diagrams</title>
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	<link>http://bradhedlund.com</link>
	<description>Studies in Data Center Networking, Virtualization, Computing</description>
	<lastBuildDate>Thu, 26 Jan 2012 01:03:09 +0000</lastBuildDate>
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		<title>Construct a Leaf Spine design with 40G or 10G? An observation in scaling the fabric.</title>
		<link>http://bradhedlund.com/2012/01/25/construct-a-leaf-spine-design-with-40g-or-10g-an-observation-in-scaling-the-fabric/</link>
		<comments>http://bradhedlund.com/2012/01/25/construct-a-leaf-spine-design-with-40g-or-10g-an-observation-in-scaling-the-fabric/#comments</comments>
		<pubDate>Wed, 25 Jan 2012 22:05:02 +0000</pubDate>
		<dc:creator>Brad Hedlund</dc:creator>
				<category><![CDATA[Design Diagrams]]></category>
		<category><![CDATA[Fabrics]]></category>
		<category><![CDATA[Routing]]></category>
		<category><![CDATA[TRILL]]></category>

		<guid isPermaLink="false">http://bradhedlund.com/?p=3482</guid>
		<description><![CDATA[Should you construct a Leaf/Spine fabric with 10G or 40G? In this post I’ll make the simple observation that using 10G interfaces in your leaf/spine fabric scales to more servers than using 40G interfaces, all with the same hardware, bandwidth, and oversubscription. Let’s suppose you’ve decided to build a Leaf/Spine fabric for your data center [...]]]></description>
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		<slash:comments>17</slash:comments>
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		<title>Hadoop network design challenge</title>
		<link>http://bradhedlund.com/2011/11/05/hadoop-network-design-challenge/</link>
		<comments>http://bradhedlund.com/2011/11/05/hadoop-network-design-challenge/#comments</comments>
		<pubDate>Sun, 06 Nov 2011 00:43:32 +0000</pubDate>
		<dc:creator>Brad Hedlund</dc:creator>
				<category><![CDATA[Big Data]]></category>
		<category><![CDATA[Design Diagrams]]></category>
		<category><![CDATA[Hadoop]]></category>

		<guid isPermaLink="false">http://bradhedlund.com/?p=3373</guid>
		<description><![CDATA[I had a bit of fun recently working on a hypothetical network design for a large scale Hadoop implementation.  A friend of mine mentioned he was responding to a challenging RFP, and when I asked him more about it out of curiosity he sent me these requirements: (4) Containers In each Container: (25) Racks (64) [...]]]></description>
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		<slash:comments>23</slash:comments>
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		<title>Routing over Nexus 7000 vPC peer-link? Yes and No.</title>
		<link>http://bradhedlund.com/2010/12/16/routing-over-nexus-7000-vpc-peer-link-yes-and-no/</link>
		<comments>http://bradhedlund.com/2010/12/16/routing-over-nexus-7000-vpc-peer-link-yes-and-no/#comments</comments>
		<pubDate>Thu, 16 Dec 2010 23:17:53 +0000</pubDate>
		<dc:creator>Brad Hedlund</dc:creator>
				<category><![CDATA[Design Diagrams]]></category>
		<category><![CDATA[Nexus]]></category>
		<category><![CDATA[Routing]]></category>
		<category><![CDATA[vPC]]></category>

		<guid isPermaLink="false">http://bradhedlund.com/?p=2472</guid>
		<description><![CDATA[This is a Nexus 7000 design question that comes up from time to time: In a Nexus 7000 Vpc environment, how can I form a layer 3 adjency between the two switches. Lets say I want to run OSPF and want to create two SVIs on the two switches connected via Vpc, Will the neighborship [...]]]></description>
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		<slash:comments>34</slash:comments>
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		<title>Cisco UCS and Nexus 1000V design diagram with Palo adapter</title>
		<link>http://bradhedlund.com/2009/08/11/cisco-ucs-nexus-1000v-design-palo-virtual-adapter/</link>
		<comments>http://bradhedlund.com/2009/08/11/cisco-ucs-nexus-1000v-design-palo-virtual-adapter/#comments</comments>
		<pubDate>Tue, 11 Aug 2009 22:21:20 +0000</pubDate>
		<dc:creator>Brad Hedlund</dc:creator>
				<category><![CDATA[Cisco UCS]]></category>
		<category><![CDATA[Design Diagrams]]></category>
		<category><![CDATA[FCoE]]></category>
		<category><![CDATA[Featured]]></category>
		<category><![CDATA[Nexus]]></category>
		<category><![CDATA[NIV]]></category>
		<category><![CDATA[QoS]]></category>
		<category><![CDATA[VMware]]></category>

		<guid isPermaLink="false">http://www.bradhedlund.com/?p=641</guid>
		<description><![CDATA[This is a follow-up and enhancement of a previous design diagram in which I showed Cisco UCS running the standard VMware vSwitch.  In this post I am once again showing Cisco UCS utilizing the Cisco (Palo) virtualized adapter with an implementation of VMware vSphere 4.0, however in this design we are running ESXi and the [...]]]></description>
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		<slash:comments>43</slash:comments>
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		<title>Cisco UCS and VMWare vSwitch design with Cisco 10GE Virtual Adapter</title>
		<link>http://bradhedlund.com/2009/07/05/cisco-ucs-vmware-vswitch-design-cisco-10ge-virtual-adapter/</link>
		<comments>http://bradhedlund.com/2009/07/05/cisco-ucs-vmware-vswitch-design-cisco-10ge-virtual-adapter/#comments</comments>
		<pubDate>Sun, 05 Jul 2009 21:33:34 +0000</pubDate>
		<dc:creator>Brad Hedlund</dc:creator>
				<category><![CDATA[Cisco UCS]]></category>
		<category><![CDATA[Design Diagrams]]></category>
		<category><![CDATA[FCoE]]></category>
		<category><![CDATA[Featured]]></category>
		<category><![CDATA[VMware]]></category>

		<guid isPermaLink="false">http://www.bradhedlund.com/?p=581</guid>
		<description><![CDATA[This diagram is a sample design of Cisco UCS running vSphere 4.0 utilizing the VMWare vSwitch and Cisco&#8217;s virtualization mezzanine adapter.  The Cisco adapter is a dual port 10GE Converged Network Adapter supporting Fibre Channel over Ethernet (FCoE) and Network Interface Virtualization (NIV).  The Cisco adapter is &#8220;virtual&#8221; in the sense that this single physical [...]]]></description>
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		<slash:comments>26</slash:comments>
		</item>
		<item>
		<title>Top of Rack vs End of Row Data Center Designs</title>
		<link>http://bradhedlund.com/2009/04/05/top-of-rack-vs-end-of-row-data-center-designs/</link>
		<comments>http://bradhedlund.com/2009/04/05/top-of-rack-vs-end-of-row-data-center-designs/#comments</comments>
		<pubDate>Sun, 05 Apr 2009 06:11:41 +0000</pubDate>
		<dc:creator>Brad Hedlund</dc:creator>
				<category><![CDATA[Cisco UCS]]></category>
		<category><![CDATA[Design Diagrams]]></category>
		<category><![CDATA[FCoE]]></category>
		<category><![CDATA[Featured]]></category>
		<category><![CDATA[FEX]]></category>
		<category><![CDATA[Nexus]]></category>
		<category><![CDATA[Switching]]></category>

		<guid isPermaLink="false">http://www.bradhedlund.com/?p=247</guid>
		<description><![CDATA[This article provides a close examination and comparison of two popular data center physical designs, "Top of Rack" and "End of Row".  We will also explore a new alternative design using Fabric Extenders, and finish off with a quick look at how Cisco Unified Computing might fit into this picture.]]></description>
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		<slash:comments>25</slash:comments>
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