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@@ -579,6 +579,48 @@
     </span>
   </a>
 
+</li>
+
+          <li class="md-nav__item">
+  <a href="#40-f1-2-split" class="md-nav__link">
+    <span class="md-ellipsis">
+      4.0 F1 / 2 Split
+    </span>
+  </a>
+
+    <nav class="md-nav" aria-label="4.0 F1 / 2 Split">
+      <ul class="md-nav__list">
+
+          <li class="md-nav__item">
+  <a href="#41-configuration-changes-for-the-cu" class="md-nav__link">
+    <span class="md-ellipsis">
+      4.1 Configuration changes for the CU
+    </span>
+  </a>
+
+</li>
+
+          <li class="md-nav__item">
+  <a href="#42-configuration-changes-for-the-du" class="md-nav__link">
+    <span class="md-ellipsis">
+      4.2 Configuration changes for the DU
+    </span>
+  </a>
+
+</li>
+
+          <li class="md-nav__item">
+  <a href="#43-launching-both-cu-and-du" class="md-nav__link">
+    <span class="md-ellipsis">
+      4.3 Launching both CU and DU
+    </span>
+  </a>
+
+</li>
+
+      </ul>
+    </nav>
+
 </li>
 
       </ul>
@@ -918,6 +960,48 @@
     </span>
   </a>
 
+</li>
+
+          <li class="md-nav__item">
+  <a href="#40-f1-2-split" class="md-nav__link">
+    <span class="md-ellipsis">
+      4.0 F1 / 2 Split
+    </span>
+  </a>
+
+    <nav class="md-nav" aria-label="4.0 F1 / 2 Split">
+      <ul class="md-nav__list">
+
+          <li class="md-nav__item">
+  <a href="#41-configuration-changes-for-the-cu" class="md-nav__link">
+    <span class="md-ellipsis">
+      4.1 Configuration changes for the CU
+    </span>
+  </a>
+
+</li>
+
+          <li class="md-nav__item">
+  <a href="#42-configuration-changes-for-the-du" class="md-nav__link">
+    <span class="md-ellipsis">
+      4.2 Configuration changes for the DU
+    </span>
+  </a>
+
+</li>
+
+          <li class="md-nav__item">
+  <a href="#43-launching-both-cu-and-du" class="md-nav__link">
+    <span class="md-ellipsis">
+      4.3 Launching both CU and DU
+    </span>
+  </a>
+
+</li>
+
+      </ul>
+    </nav>
+
 </li>
 
       </ul>
@@ -1014,6 +1098,47 @@ <h3 id="31-gnb-configuration">3.1 gNB configuration</h3>
 </code></pre></div>
 <h3 id="32-running-nr-softmodem">3.2 Running nr-softmodem</h3>
 <div class="highlight"><pre><span></span><code>$<span class="w"> </span>sudo<span class="w"> </span>./nr-softmodem<span class="w"> </span>-O<span class="w"> </span>/path-to/gnb.conf<span class="w"> </span>--sa<span class="w"> </span>-E<span class="w"> </span>--continuous-tx<span class="w"> </span><span class="p">|</span><span class="w"> </span>tee<span class="w"> </span>oai.logs
+</code></pre></div>
+<h3 id="40-f1-2-split">4.0 F1 / 2 Split</h3>
+<p>First step is to configure both the centralized unit and the distributed unit. The modified configuration that we used can be found <a href="../../RANs/oai/f1-split/">here</a></p>
+<h4 id="41-configuration-changes-for-the-cu">4.1 Configuration changes for the CU</h4>
+<div class="highlight"><pre><span></span><code>...
+local_s_if_name = "enp3s0"; #set this to your network interface
+local_s_address = "191.4.205.149"; #use 127.0.0.4 with lo interface if trying to run both units in the same computer.
+remote_s_address = "191.4.204.52"; #if you are trying to run more than one DU set this to 0.0.0.0 (any).
+...
+amf_ip_address = ( {
+    ipv4 = "192.168.70.132";
+    ipv6 = "192:168:30::17";
+    active = "yes";
+    preference = "ipv4";
+});
+
+ NETWORK_INTERFACES :
+    {
+        GNB_INTERFACE_NAME_FOR_NG_AMF            = "enp3s0";
+        GNB_IPV4_ADDRESS_FOR_NG_AMF              = "191.4.205.149/23";
+        GNB_INTERFACE_NAME_FOR_NGU               = "enp3s0";
+        GNB_IPV4_ADDRESS_FOR_NGU                 = "191.4.205.149/23";
+        GNB_PORT_FOR_S1U                         = 2152; # Spec 2152
+    };
+  }
+</code></pre></div>
+<h4 id="42-configuration-changes-for-the-du">4.2 Configuration changes for the DU</h4>
+<div class="highlight"><pre><span></span><code>...
+gNB_ID = 0xe00; #should be the same as the one defined on CU config.
+gNB_DU_ID = 0xe00; #change this if running more than one DU.
+...
+//////// Physical parameters:
+min_rxtxtime = 6;
+...
+local_n_if_name = "enp3s0"; #change this to your interface of choice.
+local_n_address = "191.4.204.149"; #if running more than one DU change this to something different from the other DUs. 
+remote_n_address = "191.4.204.174"; #change this to your CU ip addr, if local 127.0.0.4.
+</code></pre></div>
+<h4 id="43-launching-both-cu-and-du">4.3 Launching both CU and DU</h4>
+<div class="highlight"><pre><span></span><code>$<span class="w"> </span>sudo<span class="w"> </span>./nr-softmodem<span class="w"> </span>-O<span class="w"> </span>~/cu.conf<span class="w"> </span>--sa<span class="w"> </span>-E<span class="w"> </span>--continuous-tx
+$<span class="w"> </span>sudo<span class="w"> </span>./nr-softmodem<span class="w"> </span>-O<span class="w"> </span>~/du.conf<span class="w"> </span>--sa<span class="w"> </span>-E<span class="w"> </span>--continuous-tx
 </code></pre></div></div>