Information Technology Reference
In-Depth Information
Figure 10.19
h ere are diff erent
options for assign-
ing IP addresses to
VMs inside a vApp.
IP Pools Aren't the Same as DHCP
You might initially think that using Transient with IP pools means that vCenter Server uses a
DHCP-like mechanism to assign IP addresses to VMs inside a vApp without any further interaction
from the user. Unfortunately, this is not the case. Using Transient with IP pools requires the guest
OSes in the VMs in the vApp to have some sort of support for this functionality. h is support is
typically in the form of a script, executable, or other mechanism whereby an IP address is obtained
from the IP pool, and it is assigned to the guest OS inside the VM. It is not the same as DHCP and
it does not replace or supplant DHCP on a network segment.
When you i rst create a vApp, you will i nd that the only IP allocation policy that you can
select here is Static - Manual. You will need to enable the other two options before you can select
them. You enable the other IP allocation options by selecting the OVF Environment check box in
the IP Allocation area. This activates the Advanced IP Allocation dialog box shown in
Figure 10.20.
