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VCAP-CIA objective 3.2 – Manage vCloud Director network resources

September 8th, 2013 Leave a comment Go to comments

The blueprint states the following skills needed to cover this objective.

  • Create and manage network pools
  • Create Provider external networks
  • Manage and remove network resources

By default vCloud Director 5.1 will try to create a VXLAN backed network pool whenever you create a Provider VDC. If you want to use VXLAN backed pools the cluster should be prepared to actually use VXLAN which is described in detail in objective 2.3.

Duncan Epping gives a great overview about the 3 other network pools that can be created in vCloud Director.


There is also a kb describing the process.

Creating network pools in VMware vCloud Director

Additional information can also be found in the English version of the vCloud Director Administrator’s Guide on pages 23 – 25. Remember that you can assign only 1 network pool to each Organization VDC but share the same pool across different Organization VDCs. If you are opting for the network-isolation backed pool remember to increase the MTU on the distributed virtual switch backing that pool. These pools are used to back up the networking demands of the organizations in vCloud Director.  So let’s walk through the process of creating a new network pool.

Click on option 4 on the quick start page.


The first step in the wizard is to decide which network pool will be created.


The next steps differ for each pool type. While the VLAN backed pool will need information about a VLAN range, the isolation-backed pool will require only 1 VLAN and the number of isolated networks that need to be created. For the port group backed network pool you will need to choose pre-created port groups from the vSphere layer.




The rest of the process is the same for all network pool types which consists of naming the pool and possibly giving it a description and clicking “Finish” on the summary page.


You will be able to manage and modify network pools by clicking on the “Manage and Monitor” tab.


By right-clicking and selecting “Properties” you will be able to expand the pool by adding additional resources like VLANs, port groups or simply networks to it. You can also rename the network pool this way and increase the MTU to the recommended size of 1600 as described in the vCloud Director Administrator’s Guide on page 25.


The steps to create a Provider external network are described in the English version of the vCloud Director Administrator’s Guide on pages 22-23 and the following kb article.

Creating External (Provider) Networks in VMware vCloud Director

All we need to do is click option 3 on the quick start page.


The next step is to pick a vCenter server attached to vCloud Director and a appropriate port group providing access to the external network. This needs to be pre-configured on the vSphere level. According to the Administrator’s Guide this should be an auto-expanding static port group. Don’t worry as the exam is based on vSphere 5.1 this is already in place by default but for those more curious about this feature there is more information in the following 2 links.


Choosing a port binding type


Next up is configuring the actual network settings like standard gateway, subnet mask, DNS servers and the IP pool.


The last step in the creation process is naming the external network.


After clicking “Finish” on the summary page the new external network will be created. You can check the result on the “Manage and Monitor” page within vCloud Director.


The last goal for this objective is to manage and remove network resources. I am assuming that this is also related to network pools like the rest of this objective as vShield Edge devices are covered in more detail in objectives 4.1 and 4.2.

You can get an overview of the Organization networks connected to the network pools by clicking on the Organization VDC in the “Manage & Monitor” tab. The “Org VDC Networks” tab contains the information the different Organization networks and the related network pool status. By right clicking on an Organization network you will reveal the management options depending on the network type. For internal and routed networks you will be able to manage the services the vShield Edge device delivers to that network. You will also be able to reset the network, view the IP allocations and connected vApps and also manage the static IP pool settings and name by choosing “Properties”. You can delete an Organization network in this screen as well when no virtual machines are connected to that network anymore.


To change the allocated network pool for an Organization VDC simply the properties windows of that Organization VDC in the “Manage & Monitor” tab. This step is needed when you want to delete a network pool.


To actually find out which Organization VDCs are using a network pool you can simply click it in the “Manage & Monitor” tab.


By right clicking a network pool in the Network Pools overview you will be able to repair and delete the network pool. You can also change the settings of a network pool like already described in the last goal to change the MTU for a network backed pool for example.


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