You, the Service Designer, can create consistent IP
address pools for Layer 3 VPNs by selecting Prestage Devices > Resources > Add IP Address Pools from the
Network Services > Connectivity task pane in Build mode of Service
View. The IP addresses assigned to each PE/CE link need to allow routing
across the customer’s entire Layer 3 VPN, as long as the PE/CE
addresses are not exposed outside of that VPN. If the PE/CE link addresses
are accessible from outside the customer’s VPN, then those IP
addresses may also need to be globally unique across the internet,
instead of just within the customer’s VPN.
When you create an IP address pool, it appears in the Prestage
Devices > Resources inventory page. See Creating an IP Address Pool
Note: Preferably, create all IPv4 address pools at the beginning
of the prestaging process (see Prestaging
Devices Overview), before you run Role Discovery (see Discovering and Assigning All N-PE Devices), so that any IPv4 IP addresses found on devices during the role
discovery process can be marked as already allocated in the corresponding
IPv4 IP address pools.
To create an IPv4 IP address pool:
- In the Network Services > Connectivity task
pane, select Prestage Devices > Manage Resources. The Resource Utilization Status page is displayed. The status of
various resources such as VLAN, virtual circuit, route target, route
distinguisher, and IP address pool are displayed in a tabular format.
You can create a customized IP pool based on your network deployment
needs.
- Under the Allocated column, click the link in the displayed
number to open the Resource Allocated Details dialog box. If the resource
pool is an IP address pool, the IP addresses allocated from the selected
resource pool are displayed in a table. Similarly, for other resources
such as VLAN or virtual circuit, information regarding the element
or device to which the resource is allocated is displayed.
- Click Add at the top of the table of displayed
resources. The Add IP Address Pool dialog box appears.
- In the Pool Type drop-down list box, select
the IP pool type as either Global or Customer.
A Global IP address pool pertains to the service
provider. There can be more than one global IPv4 address pool. However,
each global pool must have its own unique name and its set of IPv4
addresses must not overlap with those of any other global pool. You
can allocate addresses from global pools across multiple Layer 3 VPNs
across multiple customers.
A Customer IP address pool pertains to an existing
customer. These pools are associated with the corresponding customer.
You can associate more than one customer IPv4 pool with each customer.
However, each customer pool must have its own set of IPv4 addresses
which must not overlap with those of any other pool belonging to the
same customer. You can allocate addresses from customer pools across
multiple Layer 3 VPNs for a particular customer.
- In the Pool Name field, enter a unique name.
An IP address pool name can be no more than 50 characters.
- In the IP Address Pool field, enter an IPv4
IP address pool.
Any IPv4 address pool in Junos Space maps directly onto the
Classless Interdomain Routing (CIDR) notation for IPv4 network addresses.
The CIDR network address, 192.168.1.0/24 is a contiguous block of
256 individual IPv4 addresses: 192.168.1.0/32 through 192.168.1.255/32,
inclusive. The network address 10.0.99.20/30 is a contiguous block
of 4 individual IPv4 addresses: 10.0.99.20/32 through 10.0.99.23/32,
inclusive. As a consequence, any Junos Space IPv4 address pool directly
maps to (and is identified by) its CIDR network address. The Junos
Space IPv4 address pool, 192.168.1.0/24, contains all of the addresses
from 192.168.1.0/32 to 192.168.1.255/32, while the IPv4 address pool,
10.0.99.20/30 contains all of the addresses from 10.0.99.20/32 to
10.0.99.23/32.
- In the Subnet (/) field, enter the destination
IP prefix length or the subnet mask. The subnet mask indicates the
number of bits used for the network portion of the address (for example,
10.10.20.0/24).
- If you are creating a Customer IP address pool,
the Associate with customer drop-down list box appears.
Select an existing customer name. To create a customer, see Adding a New Customer.
- Click Create.
Junos Space saves the IP address pool information in the database.
The IP address pool appears in the Resources inventory
page. The Pool Type column differentiates global from customer
IP address pools.
Note: You need to create IP address pools only if the operation
of your network requires it. Alternatively, you can use the global
IP pools provided by the Connectivity Services Director application
for IP services.
Note: When you delete an IP address pool, you must ensure that
such a pool is not being currently utilized or allocated to a managed
element. Otherwise, you cannot delete such an allocated IP address
pool.
