Update TOC for networking

_topic_map.yml

@@ -205,30 +205,34 @@ Distros: openshift-enterprise,openshift-origin
 Topics:
 - Name: Understanding networking
   File: understanding-networking
-- Name: Cluster Network Operator
+- Name: Understanding the Cluster Network Operator (CNO)
   File: cluster-network-operator
 - Name: Multiple networks
   File: managing-multinetworking
-- Name: Using multicast
-  File: using-multicast
-  Distros: openshift-origin,openshift-enterprise
-- Name: DNS
-  Dir: dns
-  Topics:
-    - Name: DNS Operator in OpenShift Container Platform
-      File: dns-operator
-- Name: Configuring kube-proxy
-  File: configuring-kube-proxy
   Distros: openshift-enterprise,openshift-origin
 - Name: Configuring network policy
   File: configuring-networkpolicy
   Distros: openshift-origin,openshift-enterprise
-- Name: Enabling egress IPs for a project
-  File: assigning-egress-ips
-  Distros: openshift-origin,openshift-enterprise
-- Name: Configuring OpenShift SDN multitenant isolation
-  File: multitenant-isolation
-  Distros: openshift-origin,openshift-enterprise
+- Name: Configuring kube-proxy
+  File: configuring-kube-proxy
+  Distros: openshift-enterprise,openshift-origin
+- Name: OpenShift SDN
+  Dir: openshift-sdn
+  Topics:
+  - Name: Enabling egress IPs for a project
+    File: assigning-egress-ips
+    Distros: openshift-origin,openshift-enterprise
+  - Name: Using multicast
+    File: using-multicast
+    Distros: openshift-origin,openshift-enterprise
+  - Name: Configuring OpenShift SDN multitenant isolation
+    File: multitenant-isolation
+    Distros: openshift-origin,openshift-enterprise
+- Name: DNS
+  Dir: dns
+  Topics:
+  - Name: DNS Operator in OpenShift Container Platform
+    File: dns-operator
 - Name: Ingress
   Dir: ingress
   Topics: