IP Address Pools in a Mobile Users—GlobalProtect Deployment
Make sure that you have specified an IP address pool
that allows enough coverage for the mobile users in your organization.
It is important to remember that each unique user can use multiple
devices to connect to Prisma Access at the same time, and each connected
device requires a unique IP address from the pool. The addresses
in this pool must not overlap with other address pools you use internally
or with the IP subnet you assign when you
Enable
the Service Infrastructure.
You can
specify IP pools for
all users in the world (Worldwide), per Prisma Access theater, or
per location group.
We recommend that the number of IP addresses in the pool is 2
times the number of mobile user devices that will connect to Prisma
Access. If your organization has a bring your own device (BYOD) policy,
or if a single user has multiple user accounts, make sure that you
take those extra devices and accounts into consideration when you
allocate your IP pools. If your pool space is limited, you can specify a
smaller address pool; however, if your IP address pool reaches its
limit, additional mobile user devices will not be able to connect.
In Panorama, the UI validates that you enter valid IP subnets
(for example, if you enter a pool with a subnet of less than /23,
it will prompt you to change it). However, it does not check to
ensure that you have allocated sufficient IP addresses for your
deployment.
This validation is not available if you configure locations
using CLI. If you deploy all locations using CLI, we recommend that
you add a /18 address in the Worldwide pool for mobile users.
Prisma Access checks your configuration to make sure that you
have specified the following minimum IP address pool:
A minimum of /23 (512 IP addresses) is required for either
a Worldwide or regional address pool.
If you do not onboard any Prisma Access gateways in a region,
an IP address pool for that region is not required. For example,
if you specify gateways in the US Northwest, US West, and US Southwest
locations, you need to only specify an IP address pool for the North
America & South America region. Conversely, if you enable mobile
user locations in Europe without specifying either a Worldwide address
pool or the Africa, Europe, & Middle East theater, your deployment
will fail.
GlobalProtect mobile users consume the IP addresses in the
location group first, then theater-specific IP addresses, then Worldwide
IP addresses. For example, if you specify a pool for a location
group and Worldwide, and you then exhaust the available IP addresses
in the location group pool, Prisma Access then takes IP addresses
from the Worldwide pool to use in that location
group.
If you specify more than one block of IP address pools,
Prisma Access uses the pools in the order that you entered them
during
mobile user setup.
