IP address management 

IP address management (IPAM) is the process of scanning specific subnets to assess the usage and availability of IP addresses within those subnets. This involves gathering valuable data for capacity planning to ensure that there are sufficient IP addresses to meet both current and future network requirements as well as to optimize IP address allocation. 

Prerequisites

• You'll need the On-Premise Poller (version 5.7 and above). 
• The Network Module should be upgraded to the latest version. Check if your Network Module needs an upgrade. 
• The On-Premise Poller and the Network Module must be up and running. 
• To resolve IP addresses in a subnet, configure a local DNS server in the IPAM settings. 

Use cases

Consider a growing organization with an expanding network infrastructure that needs to allocate, track, and monitor IP addresses efficiently. Here's how IPAM can benefit the organization: 

• Maintaining an accurate inventory of all the IP addresses: An IPAM tool enables the organization to maintain an accurate inventory of all the IP addresses within the established subnets, offering visibility into their statuses and allocation.
• Capacity planning: The organization can assess whether subnets are being overutilized or underutilized, allowing it to optimize IP address allocation and usage.
• Security and compliance: An IPAM tool empowers the organization to enforce strict controls over IP address access, ensuring that only authorized users can utilize IP addresses. This helps in mitigating security risks, preventing unauthorized IP address usage, and ensuring compliance with regulations.

How IPAM in Site24x7 works

You can monitor any subnet within your organization by adding it as an IPAM monitor in Site24x7. Additionally, if you add all the routers in your network, the IPAM tool will automatically discover the available subnets. These subnets can be found under Discovered Subnets and added as IPAM monitors directly.

Once a subnet is added, Site24x7 will use ICMP to monitor the availability of the IP addresses within the subnet. Site24x7 also uses deep scanning techniques to display the IP and DNS details as well as any events related to changes in the statuses of the IP addresses.

Adding a subnet

To begin, add your subnet as an IPAM monitor in Site24x7.

Viewing subnets

1. Log in to your Site24x7 account. 
2. Navigate to Network > IPAM > Subnets (Fig. 1).
   
   
   Figure 1. View a list of all the subnets monitored by the IPAM tool.
3. Click the required subnet. The Summary page will open (Fig. 2). 
   
   
   Figure 2. View the subnet details. 

IP Resources 

1. Navigate to Network > IPAM > Subnets.
2. Click the required subnet and navigate to the IP Resources tab. Here, you can view details like the IP Address, MAC Address, DNS Name, Last Alive Time, Status, and Asset Tag for each IP in the subnet. 
3. Sort any column as needed. To filter resources, provide the condition in the text box below each column and click the Filter button to the right. 
4. If no results were found with the applied criteria, click the refresh icon beside the monitor name and try again with different criteria. Click an IP address to view the Resource Details.
5. Toggle to the Reserved tab in the top-right of the table to see the list of IP addresses reserved by the network administrator.
6. Click Edit or the pencil icon beside the fields where it is available (Fig. 3).
   
   
   Figure 3. Edit the Resource Details.

Events

1. Navigate to Network > IPAM > Subnets.
2. Click the required subnet and navigate to the Events tab. Here, you can view all the events that occurred at any IP address of the subnet, like changes in the Previous MAC Address, Previous Status, Previous DNS, Previous DNS Status, Events, and Event Time.

Outages

1. Navigate to Network > IPAM > Subnets.
2. Click the required subnet and navigate to the Outages tab.
3. View details about outages and click the hamburger icon beside a record to add, edit, or delete comments.

Inventory

1. Navigate to Network > IPAM > Subnets.
2. Click the required subnet and navigate to the Inventory tab. Here, you can view details about the subnet, such as the Monitor Licensing Category, Monitoring Locations, Threshold and Availability Profile, Notification Profile, and User Alert Group. 
3. Edit the fields by clicking the pencil icon  beside them. 
4. Add notes by clicking Add Note. 

Log Report

1. Navigate to Network > IPAM > Subnets.
2. Click the required subnet and navigate to the Log Report tab. Here, you can view log reports and filter for a required time period and availability.
3. Click Download CSV to download the report.
4. Click the table icon to add or remove the Reason column from the report. 

Discovered Subnets 

1. Navigate to Network > IPAM > Discovered Subnets. This view displays all subnets discovered for availability and performance monitoring but not yet added to IPAM. Here, you can view the Subnet Address, Subnet Mask, and Monitoring Locations.
   
   Note

   For networks discovered using a poller group, duplicate subnets are filtered and only unique subnets are displayed.

2. If you wish to add a subnet for monitoring, click the plus icon + in the Action column beside the required subnet.
3. This will take you to Add a Subnet page. Provide the required details and click Save to start monitoring the subnet.
4. Click the Export CSV button in the top-right of the table to export the discovered subnets list as a CSV file. You can then use this CSV file for adding the subnets in bulk through the Import Monitors option.
5. If you do not wish to monitor a subnet given in the list, click the trash icon in the Action column beside the required subnet. The deleted subnet will be available in the Removed Subnet tab on the same page. If you wish to move the subnet to the Discovered Subnets again, click the restore icon in the Action column beside the required subnet.

Settings 

1. Navigate to Network > IPAM > Settings.
2. Select an On-Premise Poller from the drop-down menu to verify your IPAM settings.

Reports

Navigate to Reports > Subnets to view the following reports:

• Summary Report
• Subnets by IP Utilization
• IPAM Resources Report
  Displays a list of IP addresses in each subnet monitor. You can filter according to the Resource Status, which can be All, Used, Available, or Transient.
• IPAM Available Resources Report
  Displays a list of IP addresses in each subnet monitor. You can filter according to the Resource Status, which can be Available, Transient, or Both. 

Related articles

• Adding a subnet to the IPAM tool
• Performance metrics of an IPAM monitor