74 lines
4.7 KiB
HTML
74 lines
4.7 KiB
HTML
<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="dc.language" scheme="rfc1766" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<meta name="dc.date" scheme="iso8601" content="2005-10-17" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow"/>
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<title>SPD OptiConnect</title>
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<link rel="stylesheet" type="text/css" href="ibmidwb.css" />
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<link rel="stylesheet" type="text/css" href="ic.css" />
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</head>
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<body>
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<a id="Top_Of_Page" name="Top_Of_Page"></a><!-- Java sync-link -->
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<script language = "Javascript" src = "../rzahg/synch.js" type="text/javascript"></script>
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<a name="spdopticonnect"></a>
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<h3 id="spdopticonnect">SPD OptiConnect</h3>
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<p>SPD OptiConnect is the term used to refer to OptiConnect licensed software
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providing high speed server-to-server connectivity between servers which are
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connected to each other through SPD bus technology. SPD OptiConnect requires
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a SPD bus which is available on earlier iSeries™ server models and supported through
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the 5077 SPD migration unit supported on some iSeries 8xx models. iSeries server models
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with HSL-2 ports do not support SPD OptiConnect.</p>
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<p> The servers in a SPD OptiConnect network share a common external optical
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system bus that is located in a dedicated expansion unit or frame (also called
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a SPD OptiConnect hub unit). The server that provides this system bus is called
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the <span class="bold">hub</span> server. The hardware used to create a hub server
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for a SPD OptiConnect network consists of a dedicated system I/O expansion
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unit or frame. Each server that plugs into this bus with an OptiConnect Receiver
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card is called a <span class="bold">satellite</span> server. Each satellite server
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dedicates one of its external system buses to connect to the receiver card
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in the hub server's expansion unit or frame.</p>
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<p>Redundancy is supported on SPD OptiConnect networks through SPD bus redundancy.
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Redundancy requires a second SPD OptiConnect Hub, an extra set of OptiConnect
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Receiver cards, and an extra I/O expansion unit or frame, along with another
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set of cables.</p>
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<a name="wq4"></a>
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<div class="notetitle" id="wq4">Note:</div>
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<div class="notebody">Servers attached to the hub server do <span class="bold">not</span> use the hub server's CPU resources.</div>
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<a name="spdopti"></a>
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<div class="fignone" id="spdopti"><span class="figcap">Figure 4. SPD OptiConnect</span>
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<div class="mmobj">
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<img src="rzaeb506.gif" alt="SPD OptiConnect" /></div></div>
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<p><a href="rzau3spdopticonnect.htm#spdopti">Figure 4</a> shows a dual bus configuration, providing full redundancy
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in the SPD OptiConnect system area network. If one of the hub servers fail,
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the SPD OptiConnect network remains up, and all communications activity is
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run through the other hub. When both hubs are operating, the communications
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traffic is shared between both. This increases the bandwidth with two paths
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available for use.</p>
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<p>An SPD OptiConnect network can consist of up to 14 servers (one hub and
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13 satellites) with full server-to-server connectivity. A satellite server
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can communicate with both hub servers and all satellite servers on the same
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shared bus. Interoperability between operating system versions is maintained
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so that servers at different release levels can be connected in the same SPD
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OptiConnect network. With additional hubs, up to 32 servers can be supported.</p>
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<p>iSeries models 840, 830, and 270 can participate in an SPD OptiConnect
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environment by using a migration unit.</p>
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<p>For more information about SPD OptiConnect (including information about
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supported models) see the <a href="http://www.ibm.com/servers/eserver/iseries/ha/" target="_blank">High Availability and Clusters Web Site</a> (www.ibm.com/servers/eserver/iseries/ha).
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<img src="www.gif" alt="Link outside Information Center" /></p>
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<a id="Bot_Of_Page" name="Bot_Of_Page"></a>
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</body>
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</html>
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