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Configure Server Discovery- Configuring DHCP and IPAM

Once you have successfully installed and provisioned the IPAM feature on your Windows Server 2022 machine, you can begin server discovery. One of the great things about IPAM is that you can define multiple domains within the same forest to be managed by a single IPAM server.

Once initiated, server discovery will automatically search for all the machines running on the specified domain. Administrator privileges are required for the domain against which you are running server discovery. Exercise 6.15 will walk you through the server discovery process.

EXERCISE 6.15

Configuring IPAM Server Discovery
  1. Open Server Manager and select IPAM.
  2. On the IPAM Overview page, select option 3, Configure Server Discovery.
  3. On the Configure Server Discovery page, select and add the forest and domains you want to discover and click OK. When you add the domain, it should appear under the Select The Server Roles To Discover section and Domain Controller, DNS, and DHCP should be checked (see Figure 6.27).

FIGURE 6.27 Configuring Server Discovery

4. On the IPAM Overview page, select option 4, Start Server Discovery. The task will run in the background. You will receive notification once server discovery has completed.

5. On the IPAM home page, select Server Inventory to review the now-c ompleted server discovery of the requested domain (see Figure 6.28). This may take a few minutes and you may need to refresh Server Manager.

6. Close Server Manager.

Create and Manage IP Blocks and Ranges

In IPAM, IP address space is divided into addresses, ranges, and blocks. Blocks are groups of ranges, and ranges are groups of IPs. Here you will find a breakdown of each IP Management space found within IPAM:

IP Addresses Individual IP addresses map to a single IP address range. When you map an IP address to a range, it enables actions to be taken on a range that affect all IP addresses in the range, such as adding, updating, or deleting IP address fields.

IP Address Ranges IP address ranges are smaller chunks of IP addresses that typically correspond to a DHCP scope. IP address ranges are contained within, or “mapped to,” IP address blocks. IP address ranges cannot map to multiple IP address blocks and ranges that map to the same block cannot overlap.

IP Address Blocks IP address blocks are large chunks of IP addresses that are used to organize address space at a high level. For example, you might use one IP address block for all private IP addresses in your organization and another block for public IP addresses. You can think of IP address blocks as containers that hold IP address ranges. IP address blocks are not deployed and managed on the network like IP address ranges or individual IP addresses.

When you have an IPAM managed DHCP server, the IP address ranges found within the scopes of that DHCP server are automatically entered into the IPAM database during the discovery process. Individual IP addresses and IP blocks are not automatically added to the IPAM database.

Exercise 6.16 will demonstrate how to add an IP address manually and also how to add an IP address block. I will be adding the IP address of my DNS/DHCP server.

EXERCISE 6.16

Manually Add IPAM IP Address and Blocks
  1. Open Server Manager and select IPAM.
  2. Select IP Address Blocks.
  3. Right- click IPv4 and select Add IP Address.
  4. Enter the IP address of the device that is to be managed by IPAM. Keep all other defaults.
  5. Click Apply.
  6. On the Summary page, verify that the task completed successfully. Click OK.
  7. Your new IP address is now managed by IPAM. You can now both create and delete DHCP reservations and DNS records for this IP address space from inside the IPAM management console.
  8. Right- click IPv4 and select Add IP Address Block.
  9. Fill in the following field and click OK:

Network ID: 10.10.16.0

Leave all other fields at their defaults.

10. Close Server Manager.

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