add to TOC; x-link

Author: dlepow

articles/container-instances/TOC.yml

@@ -51,6 +51,8 @@
     href: container-instances-orchestrator-relationship.md
   - name: Security considerations
     href: container-instances-image-security.md
+  - name: Virtual network considerations
+    href: container-instances-virtual-network-concepts.md
 - name: How-to guides
   items:
   - name: Deploy

articles/container-instances/container-instances-container-groups.md

@@ -61,7 +61,7 @@ In this scenario, you could set a resource limit of 2 CPUs for the container ins
 
 ## Networking
 
-Container groups can share an external-facing IP address, one or more ports on that IP address, and a DNS label with a fully qualified domain name (FQDN). To enable external clients to reach a container within the group, you must expose the port on the IP address and from the container. Because containers within the group share a port namespace, port mapping isn't supported. A container group's IP address and FQDN will be released when the container group is deleted. 
+Container groups can share an external-facing IP address, one or more ports on that IP address, and a DNS label with a fully qualified domain name (FQDN). To enable external clients to reach a container within the group, you must expose the port on the IP address and from the container. A container group's IP address and FQDN are released when the container group is deleted. 
 
 Within a container group, container instances can reach each other via localhost on any port, even if those ports aren't exposed externally on the group's IP address or from the container.
 
@@ -110,7 +110,7 @@ Learn how to deploy a multi-container container group with an Azure Resource Man
 [resource-limits]: /rest/api/container-instances/containergroups/createorupdate#resourcelimits
 [resource-requirements]: /rest/api/container-instances/containergroups/createorupdate#resourcerequirements
 [azure-files]: container-instances-volume-azure-files.md
-[virtual-network]: container-instances-vnet.md
+[virtual-network]: container-instances-virtual-network-concepts.md
 [secret]: container-instances-volume-secret.md
 [volume-gitrepo]: container-instances-volume-gitrepo.md
 [gpus]: container-instances-gpu.md