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</script><h2><span style="color: #ed1f24;">Ethernet Fabrics</span></h2>

<p><a href="http://software-defined-network.com/glossar/ethernet-fabrics" title="Glossary: Ethernet Fabrics"  class="glossaryLink">Ethernet Fabrics</a> haben eine neue Technologie-Kategorie innerhalb des Rechenzentrums geschaffen. Sie entwickeln die Infrastruktur des Netzwerks weiter &ndash; weg vom Management physikalischer Ports hin zu Flows &ndash; mit dem Ziel, einfacheres Management bei Set-Up und Betrieb, aber auch mehr <a href="http://software-defined-network.com/glossar/skalierbarkeit" title="Glossary: Skalierbarkeit"  class="glossaryLink">Skalierbarkeit</a>, Flexibilit&auml;t, Robustheit und VM-Bezug zu erreichen.</p>

<p><a href="http://software-defined-network.com/wp-content/uploads/2014/05/IDC-Automation-Whitepaper_DE.pdf">IDC (gelangen Sie hier&nbsp;zum <strong>IDC&nbsp;Market Spotlight</strong> 2014</a>)&nbsp;definiert ein Ethernet Fabric als Switch Netzwerk, das wesentlich flexibler und einfacher als das bisherige Layer 3 geroutete Netzwerk ist. Ein Ethernet Fabric erweitert die Control und Management Planes &uuml;ber den physikalischen Switch hinaus ins Fabric. Es erm&ouml;glicht den Austausch gemeinsamer Konfigurationsparameter innerhalb aller Switch-Ports der Fabric. Technisch gesprochen ist Ethernet Fabric also eine flach vermaschte Architektur innerhalb der Layer-2 Netzwerk-Topologie.</p>

<p><a href="http://software-defined-network.com/glossar/ethernet-fabrics" title="Glossary: Ethernet Fabrics"  class="glossaryLink">Ethernet Fabrics</a> erm&ouml;glichen es Servern, sich mittels Pay-per-Port mit Rechenzentrums-Netzwerken zu verkn&uuml;pfen. Unternehmen m&uuml;ssen somit nicht l&auml;nger eine separate externe Switch-Umgebung aufrechterhalten. Und Rechenzentrumsbetreiber schaffen einen weniger komplexen und kostenreduzierten <a href="http://software-defined-network.com/glossar/cloud" title="Glossary: Cloud"  class="glossaryLink">Cloud</a>-Service, der ohne zus&auml;tzlichen Verwaltungsaufwand und Personal betrieben werden kann.</p>

<p>Dank <a href="http://software-defined-network.com/glossar/ethernet-fabrics" title="Glossary: Ethernet Fabrics"  class="glossaryLink">Ethernet Fabrics</a> m&uuml;ssen einzelne Teile des bestehenden Netzwerks nicht mehr ersetzt werden. Verbraucher und Unternehmen sind nicht l&auml;nger an bestimmte Anbieter gebunden.</p>

<p>&nbsp;</p>

<h2><span style="color: #ed1f24;">Vorteile von Ethernet Fabrics</span></h2>

<h4>
<b><i>Ethernet Fabrics&nbsp;</i></b><b><i>&ndash; die L&ouml;sung f&uuml;r h&ouml;chste Anspr&uuml;che</i></b>
</h4>

<p style="padding-left: 30px;">Pragmatisch gesehen l&ouml;sen <a href="http://software-defined-network.com/glossar/ethernet-fabrics" title="Glossary: Ethernet Fabrics"  class="glossaryLink">Ethernet Fabrics</a> viele der klassischen Probleme eines Administrators:</p>

<h4>
<i></i><b><i>Einfachere Virtualisierung</i></b>
</h4>

<p style="padding-left: 30px;">Standard-Ethernet-Switching erfordert die Konfiguration aller Switch-Ports &ndash; nur wird das problematisch, wenn immer mehr virtuelle Maschinen (VM) pro Switch-Port konfiguriert werden m&uuml;ssen. Wird eine VM zwischen physikalischen Servern bewegt, m&uuml;ssen alle Ports neu konfiguriert werden. Migriert eine VM zwischen Servern, m&uuml;ssen viele Serverattribute von Ursprungs-und Ziel-Server identisch sein. Dies setzt sich ins Netzwerk fort und betrifft f&uuml;r Switch Ports VLAN, Access Control List (ACL), Quality of Service (QoS) und Security-Profile.&nbsp;<a href="http://software-defined-network.com/glossar/ethernet-fabrics" title="Glossary: Ethernet Fabrics"  class="glossaryLink">Ethernet Fabrics</a> erm&ouml;glichen nun den Austauschgemeinsamer Konfigurationsinformationen zwischen den <a href="http://software-defined-network.com/glossar/switches" title="Glossary: Switches"  class="glossaryLink">Switches</a>; ein manueller Eingriff ist nicht mehr n&ouml;tig. Der k&uuml;rzeste Loop-freie Weg wird dank Multipath Routing automatisch gew&auml;hlt und die Latenzzeiten sinken.</p>

<h4>
<b><i>H&ouml;here Connectivity</i></b><i></i>
</h4>

<p style="padding-left: 30px;">Ethernet Fabric bietet always-on active-active Connectivity. Es kommt ohne Spanning-Tree-Protokoll aus, arbeitet aber mit bestehenden Ethernet Netzen und nutzt statt <a href="http://software-defined-network.com/glossar/spanning-tree-protokoll" title="Glossary: STP"  class="glossaryLink">STP</a> eine &bdquo;Selbst-Aggregation&ldquo; von ISL-Verbindungen zwischen den angebundenen <a href="http://software-defined-network.com/glossar/switches" title="Glossary: Switches"  class="glossaryLink">Switches</a>. Verbindet sich beispielsweise ein Ger&auml;t mit einem Port im Fabric, wissen das alle <a href="http://software-defined-network.com/glossar/switches" title="Glossary: Switches"  class="glossaryLink">Switches</a>. Sobald dieses Ger&auml;t nun Daten zu einem anderen Ger&auml;t sendet, identifiziert das Fabric automatisch den k&uuml;rzesten Pfad.<i></i></p>

<h4>
<b><i>Bessere Performance und Belastbarkeit</i></b><i></i>
</h4>

<p style="padding-left: 30px;">Flexible und multiple &ldquo;least cost&rdquo; Pfade garantieren H&ouml;chstleistung und Belastbarkeit, denn die elastischen <a href="http://software-defined-network.com/glossar/ethernet-fabrics" title="Glossary: Ethernet Fabrics"  class="glossaryLink">Ethernet Fabrics</a> lassen sich leicht skalieren. Die optimierte Struktur f&uuml;hrt zu besserer Auslastung sowie zu h&ouml;herer Verf&uuml;gbarkeit und <a href="http://software-defined-network.com/glossar/skalierbarkeit" title="Glossary: Skalierbarkeit"  class="glossaryLink">Skalierbarkeit</a> bei gleichzeitig niedrigeren Betriebskosten.<i></i></p>

<h4>
<b><i>Leichteres Management durch mehr Automatisierung</i></b><i></i>
</h4>

<p style="padding-left: 30px;"><a href="http://software-defined-network.com/glossar/ethernet-fabrics" title="Glossary: Ethernet Fabrics"  class="glossaryLink">Ethernet Fabrics</a> machen das Management verschiedener Switch-Ebenen &uuml;berfl&uuml;ssig. Sie verwalten Policies und <a href="http://software-defined-network.com/glossar/traffic" title="Glossary: Traffic"  class="glossaryLink">Traffic</a> &uuml;ber mehrere <a href="http://software-defined-network.com/glossar/switches" title="Glossary: Switches"  class="glossaryLink">Switches</a> hinweg so, als w&auml;re es nur ein Switch und skalieren Netzwerk-Bandbreiten ohne manuelle Rekonfiguration von Switch Ports oder der Netzwerk-Policies. Die aktuelleren Versionen bieten sogar Funktionalit&auml;ten, die man eher von Fibre Channel kennt: Sie gestalten sich selbst und agieren als einzige logische Einheit, in der sich alle <a href="http://software-defined-network.com/glossar/switches" title="Glossary: Switches"  class="glossaryLink">Switches</a> automatisch gegenseitig, sowie die angebundenen physikalischen und logischen Ger&auml;te erkennen. Das Management ist eher Domain-basiert und &uuml;ber Policies definierbar als eine Daueraufgabe.<i></i></p>

<p>Im Vergleich zu klassischen hierarchischen Ethernet Architekturen bieten <a href="http://software-defined-network.com/glossar/ethernet-fabrics" title="Glossary: Ethernet Fabrics"  class="glossaryLink">Ethernet Fabrics</a> mehr Leistung, Ressourcen-Nutzung, Verf&uuml;gbarkeit und Einfachheit. So k&ouml;nnen Kosten gesenkt, Ums&auml;tze maximiert und in letzter Instanz die Virtualisierungskette &uuml;ber das <a href="http://software-defined-network.com/glossar/rechenzentrum" title="Glossary: Rechenzentrum"  class="glossaryLink">Rechenzentrum</a> hinaus bis zum Desktop des Anwenders verl&auml;ngert werden. Man braucht das Spanning Tree Protocol nicht mehr, kann aber mit bestehenden Ethernets weiterarbeiten. Es kann in jeder Topologie konzipiert werden &ndash;&nbsp; damit ist es flexibel und passt sich den Anforderungen dynamisch an.</p>
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