Figure 3.17 Disabling the automatic creation of logical networks in SCVMM 2016
Those of you who used SCVMM 2012 SP1 will notice that the option to also
automatically create virtual switches (VM networks) has been removed. The
automatic creation of virtual switches, which virtual machines use to connect, caused
a lot of confusion, so it was removed in R2. At this point, you can safely add Hyper-V
hosts to the SCVMM environment without them automatically creating logical
networks that you don’t want in the environment.
CREATING LOGICAL NETWORKS
In this environment, I have three networks available that I will model as logical
networks. However, they are all separate VLANs on the same physical network that
will be controlled by setting the VLAN ID on the virtual network adapter. The physical
ports on the switch have been configured to allow all of the various VLANs that can be
configured (similar to a trunk port):
Corporate Network The main address space used by my organization, which on my
switches uses VLAN 10 in all locations.
Lab Network The network used for numerous separate lab environments; each
environment has its own IP subnet and VLAN.
Network Virtualization Network This will be used in the future when network
virtualization is explored.
The steps to create a logical network are detailed here:
1 . Open Virtual Machine Manager.
2 . Open the Fabric workspace.
3 . Select the Networking ➣ Logical Networks navigation node.
4 . Click the Create Logical Network button, which launches the Create Logical
Network Wizard.
5 . Enter a name and description for the logical network and click Next.
6 . In the Settings tab, shown in Figure 3.18, you select a type of network. It can be a
connected network that allows multiple sites to communicate with each other and
use network virtualization, a VLAN-based independent network, or a PVLAN-based
network. Note that when you are creating a network with the One Connected
Network option, the option to create a VM network automatically to map to the
logical network is available, but in this example we will manually create it. Because
this is the corporate network, we won’t use network virtualization. Click Next.
7 . The next screen enables you to configure the sites. For corporate, you need only a
single site using VLAN 10, because the switch is configured to allow VLAN 10
through to the corporate network. Click the Add button to add a site and then click
Insert Row to add VLAN/IP details for the site. The IP space is configured by