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<h1 class="topictitle1">Line pool</h1>
<div><p>Select this line service to set the PPP connection to use a line
from a line pool. When the PPP connection starts, the iSeries™ server selects an unused line
from the line pool. For dial on-demand profiles, the server does not select
the line until it detects TCP/IP traffic for the remote system.</p>
<div class="section"><p>You can use a line pool instead of defining a particular line
description for a connection profile. You can specify one or more line descriptions
in a line pool.</p>
</div>
<div class="section"><p>A line pool also enables a single connection profile to handle
either multiple incoming analog calls or a single outgoing analog call. The
line returns to the line pool when the PPP connection ends.</p>
</div>
<div class="section"><p>If you use the line pool to handle multiple incoming analog calls
simultaneously, you need to indicate the maximum number of incoming connections.
You can set this on the Connections tab of the<span class="uicontrol">New Point-to-Point
Profile Properties</span> dialog when you configure your connection profile.
Use the Multilink setting to use line pools for single connections with increased
bandwidth.</p>
</div>
<div class="section"><h4 class="sectiontitle">Advantages of using line pools:</h4><ul><li>You do not commit a line resource to a PPP connection until it starts.
<p>For PPP connections that use a specific line, the connection ends if the
line is not available unless the dynamic resource sharing is enabled. For
connections that use a line pool, at least one line in the line pool must
be available when the profile starts.</p>
<p>In addition, if the resources
are configured as shared (enable dynamic resource sharing), additional resource
availability is achieved particularly for outgoing connections.</p>
</li>
<li>You can use dial-on-demand profiles with line pools to use resources more
efficiently. <p>The iSeries server selects a line from the line pool
only when using a dial-on-demand connection. Other connections can use the
same line at other times.</p>
</li>
<li>You can start more PPP connections with less resources to support. <p>For
example, if your environment needs four unique connection types but you only
need two lines at any given time, you can use a line pool to make this environment
work. You can create four dial-on-demand connection profiles and have each
profile reference a line pool that contains two line descriptions. Each of
the lines will be for use by all four connection profiles, thus allowing two
connections to be active at any time. By using a line pool, you do not need
to have four separate lines.</p>
<p>Also, if your environment is a combination
between a PPP Client and a PPP Server, lines can be shared (enable dynamic
resource sharing) whether they are used as 'single lines' or placed in a 'line
pool'. The profile that started first will not commit the resource unless
the connection is active. For example, if the PPP Server is started, and is
listening for the incoming connections, it will 'lend' a line it uses to the
PPP Client that started and 'borrowed' the shared line from the PPP Server. </p>
</li>
</ul>
</div>
<div class="section"><h4 class="sectiontitle">Configure line pools</h4><p>Line pools are defined within
a connection profile. For basic line pool configuration, follow these steps:</p>
</div>
<div class="section"> <ol><li>In iSeries Navigator,
select your system, and expand <span class="menucascade"><span class="uicontrol">Networking</span> &gt; <span class="uicontrol">Remote Access Services</span></span>.</li>
<li>Create a connection profile to either dial or receive calls. Select from
one of the following options: <ul><li>Right-click<span class="uicontrol"> Originator Connection Profiles</span> to set
the iSeries server
as a server that initiates connections. </li>
<li>Right-click <span class="uicontrol">Receiver Connection Profiles</span> to set
the iSeries server
as a server that allows incoming connections from remote systems and users. </li>
</ul>
</li>
<li>Select <span class="uicontrol">New profile</span>.</li>
<li>For an originator profile (dialing out) select: PPP, Switched line, and
the Operating mode (typically dial). For link configuration, select <span class="uicontrol">Line
pool</span>. Click <span class="uicontrol">OK</span> and iSeries Navigator will open a properties
window for this connection profile. <div class="note"><span class="notetitle">Note:</span> You can also select a line pool
when you create Receiver connection profiles. The Line pool option may or
may not be listed, depending on the following field values: protocol type,
connection type, and operating mode. </div>
</li>
<li>On the General page, name the profile and enter a description.</li>
<li>On the Connection page, enter a name for the line pool and click <span class="uicontrol">New</span>.
This will open the <span class="uicontrol">New Line Pool Properties</span> dialog
which will display all the available lines and modems for this system. </li>
<li>Select the lines you want to use, and add them to the pool. You can also
click <span class="uicontrol">New line</span> to define a new line. </li>
<li>Click <span class="uicontrol">OK</span> to save this line pool, and return to
the New Point-to-Point Profile properties.</li>
<li>Complete the necessary information about the other pages (for example,
TCP/IP settings and Authentication). </li>
<li>The connection profile will go down the list of available lines (within
the pool) until a resource is available and use that line for the connection.
Use iSeries Navigator
help for further assistance.</li>
</ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaiylinkcfg.htm" title="Link configuration defines the type of line service that your PPP connection profile uses to establish a connection.">Link configuration</a></div>
</div>
<div class="relref"><strong>Related reference</strong><br />
<div><a href="rzaiyclients.htm" title="Remote users, such as telecommuters or mobile clients, often require access to a company's network. These dial-in clients can gain access to an iSeries server with PPP.">Scenario: Connect remote dial-in clients to your iSeries server</a></div>
<div><a href="rzaiyisp.htm" title="Administrators typically set up office networks that allow employees access to the Internet. They can use a modem to connect the iSeries server to an ISP. LAN-attached PC clients can communicate with the Internet using the iSeries server as a gateway.">Scenario: Connect your office LAN to the Internet with a modem</a></div>
<div><a href="rzaiyremcorp.htm" title="A modem enables two remote locations (such as a central office and a branch office) to exchange data between them. PPP can connect the two LANs together by establishing a connection between an iSeries server in the central office and another iSeries server in the branch office.">Scenario: Connect your corporate and remote networks with a modem</a></div>
</div>
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