ibm-information-center/dist/eclipse/plugins/i5OS.ic.rzau3_5.4.0.1/rzau3hsl.htm

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<title>HSL OptiConnect</title>
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<h3 id="hsl">HSL OptiConnect</h3>
<p>HSL OptiConnect is the term used to refer to the OptiConnect licensed software
providing high speed server-to-server connectivity between two or three servers
which are connected to each other through an HSL OptiConnect loop. It also
refers to the HSL Loop technology used to connect two or three physical servers
together on a single loop. Each server may have one or more LPAR partitions
participating in the OptiConnect network.</p>
<p>While each HSL OptiConnect loop is limited to three servers, OptiConnect
software will support multiple HSL OptiConnect loops between servers, providing
loop redundancy in addition to the hardware redundancy provided within each
HSL loop. It should be noted that any LPAR partition on the server may be
allowed to participate in the HSL OptiConnect loop functions without additional
cost.</p>
<p>To activate Virtual OptiConnect communications between LPAR partitions,
the OptiConnect licensed software must be installed on all of the partitions
where you want to use Virtual OptiConnect and the OptiConnect subsystem must
be started on each of these partitions.</p>
<p>On 5xx models, from the Hardware Management Console (HMC), select Server
Management and then select the local partition profile properties. Under the
OptiConnect tab select Use High Speed Link (HSL) OptiConnect. In order for
the change to take effect, you must activate the partition from the HMC.</p>
<p>On 8xx models, use the dedicated service tools (DST) or system service
tools (SST) to configure each LPAR partition into the HSL OptiConnect loop
environment. From the primary partition set the communication option "Connect
to HSL OptiConnect" to "yes" for each partition (in addition to the primary)
that uses the OptiConnect function.</p>
<p>The following figure shows an example of two servers that are connected
through an HSL OptiConnect loop. When OptiConnect software is installed and
running, a high-speed server-to-server connection is maintained. Two servers
can have more than one HSL loop that connects them together, providing the
server model supports more than one HSL OptiConnect loop.</p>
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<div class="fignone" id="hslopti"><span class="figcap">Figure 1. HSL OptiConnect</span>
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<img src="rzaeb504.gif" alt="HSL OptiConnect Example" /></div></div>
<p>There are two HSL cabling types: HSL and HSL-2. Servers and expansion units
may have HSL or HSL-2 cable ports, depending on the model. Both types are
supported on an HSL OptiConnect loop by using an HSL to HSL-2 cable.</p>
<p>HSL OptiConnect loops also support the use of HSL fiber-optic cables. This
technology is offered on some models. The entire HSL OptiConnect loop must
use the fiber-optic cables.</p>
<p>The following figure shows an example of a three-server HSL OptiConnect
loop. All servers in a three-server HSL OptiConnect loop must be at the minimum
operating system release level of the most current hardware.</p>
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<div class="fignone" id="wq3"><span class="figcap">Figure 2. Three server HSL OptiConnect Loop</span>
<div class="mmobj">
<img src="rzaeb502.gif" alt="Three server HSL OptiConnect Loop" /></div></div>
<p>Additional information about HSL cabling can also be found on 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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