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<span id="install-network-support-label"></span><h1><span class="section-number">4.9.3. </span>Networking support / options<a class="headerlink" href="#networking-support-options" title="Permalink to this heading"></a></h1>
<p>The following are command line options for various network types that
can be used with <code class="docutils literal notranslate"><span class="pre">configure</span></code>:</p>
<ul>
<li><p><code class="docutils literal notranslate"><span class="pre">--with-fca=DIR</span></code>:
Specify the directory where the Mellanox FCA library and
header files are located.</p>
<p>FCA is the support library for Mellanox switches and HCAs.</p>
</li>
<li><p><code class="docutils literal notranslate"><span class="pre">--with-hcoll=DIR</span></code>:
Specify the directory where the Mellanox hcoll library and header
files are located. This option is generally only necessary if the
hcoll headers and libraries are not in default compiler/linker
search paths.</p>
<p>hcoll is the support library for MPI collective operation offload on
Mellanox ConnectX-3 HCAs (and later).</p>
</li>
<li><p><code class="docutils literal notranslate"><span class="pre">--with-knem=DIR</span></code>:
Specify the directory where the knem libraries and header files are
located. This option is generally only necessary if the knem headers
and libraries are not in default compiler/linker search paths.</p>
<p>knem is a Linux kernel module that allows direct process-to-process
memory copies (optionally using hardware offload), potentially
increasing bandwidth for large messages sent between messages on the
same server. See <a class="reference external" href="https://knem.gitlabpages.inria.fr/">the Knem web site</a> for details.</p>
</li>
<li><p><code class="docutils literal notranslate"><span class="pre">--with-libfabric=DIR</span></code>:
Specify the directory where the OpenFabrics Interfaces <code class="docutils literal notranslate"><span class="pre">libfabric</span></code>
library and header files are located. This option is generally only
necessary if the libfabric headers and libraries are not in default
compiler/linker search paths.</p>
<p>Libfabric is the support library for OpenFabrics Interfaces-based
network adapters, such as Cisco usNIC, Intel True Scale PSM, Cray
uGNI, etc.</p>
</li>
<li><p><code class="docutils literal notranslate"><span class="pre">--with-libfabric-libdir=DIR</span></code>:
Look in directory for the libfabric libraries. By default, Open MPI
will look in <code class="docutils literal notranslate"><span class="pre">DIR/lib</span></code> and <code class="docutils literal notranslate"><span class="pre">DIR/lib64</span></code>, which covers most cases.
This option is only needed for special configurations.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">--with-portals4=DIR</span></code>:
Specify the directory where the Portals4 libraries and header files
are located. This option is generally only necessary if the Portals4
headers and libraries are not in default compiler/linker search
paths.</p>
<p>Portals is a low-level network API for high-performance networking
on high-performance computing systems developed by Sandia National
Laboratories, Intel Corporation, and the University of New Mexico.
The Portals 4 Reference Implementation is a complete implementation
of Portals 4, with transport over InfiniBand verbs and UDP.</p>
</li>
<li><p><code class="docutils literal notranslate"><span class="pre">--with-portals4-libdir=DIR</span></code>:
Location of libraries to link with for Portals4 support.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">--with-portals4-max-md-size=SIZE</span></code> and
<code class="docutils literal notranslate"><span class="pre">--with-portals4-max-va-size=SIZE</span></code>:
Set configuration values for Portals 4</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">--with-psm=<directory></span></code>:
Specify the directory where the QLogic InfiniPath / Intel True Scale
PSM library and header files are located. This option is generally
only necessary if the PSM headers and libraries are not in default
compiler/linker search paths.</p>
<p>PSM is the support library for QLogic InfiniPath and Intel True Scale
network adapters.</p>
</li>
<li><p><code class="docutils literal notranslate"><span class="pre">--with-psm-libdir=DIR</span></code>:
Look in directory for the PSM libraries. By default, Open MPI will
look in <code class="docutils literal notranslate"><span class="pre">DIR/lib</span></code> and <code class="docutils literal notranslate"><span class="pre">DIR/lib64</span></code>, which covers most cases. This
option is only needed for special configurations.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">--with-psm2=DIR</span></code>:
Specify the directory where the Intel Omni-Path PSM2 library and
header files are located. This option is generally only necessary
if the PSM2 headers and libraries are not in default compiler/linker
search paths.</p>
<p>PSM is the support library for Intel Omni-Path network adapters.</p>
</li>
<li><p><code class="docutils literal notranslate"><span class="pre">--with-psm2-libdir=DIR</span></code>:
Look in directory for the PSM2 libraries. By default, Open MPI will
look in <code class="docutils literal notranslate"><span class="pre">DIR/lib</span></code> and <code class="docutils literal notranslate"><span class="pre">DIR/lib64</span></code>, which covers most cases. This
option is only needed for special configurations.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">--with-ucx=DIR</span></code>:
Specify the directory where the UCX libraries and header files are
located. This option is generally only necessary if the UCX headers
and libraries are not in default compiler/linker search paths.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">--with-ucx-libdir=DIR</span></code>:
Look in directory for the UCX libraries. By default, Open MPI will
look in <code class="docutils literal notranslate"><span class="pre">DIR/lib</span></code> and <code class="docutils literal notranslate"><span class="pre">DIR/lib64</span></code>, which covers most cases. This
option is only needed for special configurations.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">--with-usnic</span></code>:
Abort configure if Cisco usNIC support cannot be built.</p></li>
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