Monitor CIDR usage with the IPAM dashboard - Amazon Virtual Private Cloud

Monitor CIDR usage with the IPAM dashboard

Follow the steps in this section to access the IPAM dashboard and view the status of all CIDRs within a particular IPAM scope.

AWS Management Console
To monitor CIDR usage using the IPAM dashboard
  1. Open the IPAM console at https://console.aws.amazon.com/ipam/.

  2. In the navigation pane, choose Dashboard.

  3. By default, when you view the dashboard, the default private scope is selected. If you don’t want to use the default private scope, from the dropdown menu at the top of the content pane, choose the scope you want to use. For more information about scopes, see How IPAM works.

  4. View the monitoring data in the following sections:

    • Scope: The details for this scope.

      • Scope ID: The ID for this scope.

      • Description: An optional description for the scope.

      • IPAM ID: The ID of the IPAM that the scope is in.

      • Scope type: The type of scope.

    • Summary: The number of CIDRs per category.

      • Managed CIDRs: The number of resource CIDRs for manageable resources (VPCs or public IPv4 pools) that are allocated from an IPAM pool in the scope.

      • Unmanaged CIDRs: The number of resource CIDRs for unmanaged resources in this scope.

      • Ignored CIDRs: The number of resource CIDRs that you have chosen to be exempt from monitoring with IPAM in the scope. IPAM does not evaluate ignored resources for overlap or compliance within a scope. When a resource is chosen to be ignored, any space that's allocated to it from an IPAM pool is returned to the pool, and the resource will not be imported again through automatic import (if the automatic import allocation rule is set on the pool).

      • Pools: The number of pools in the scope.

      • Compliant CIDRs: The number of resource CIDRs that comply with the allocation rules for IPAM pools in the scope.

      • Overlapping CIDRs: The number of resource CIDRs that overlap within a pool in the scope.

      • Noncompliant CIDRs: The number of resource CIDRs that do not comply with the allocation rules for the IPAM pools in the scope.

    • Compliant vs. noncompliant CIDRs: The number of compliant versus noncompliant CIDRs in the scope

    • Overlapping CIDRs: The number of CIDRs that currently overlap within the IPAM pools in this scope. Overlapping CIDRs can lead to incorrect routing in your VPCs.

    • Pool assignment: The percentage of IP space that has been assigned to resources and manual allocations in the scope.

    • Pool allocation: The percentage of a pool's IP space that has been allocated to other pools in the scope.

Command line

The information displayed in the dashboard comes from metrics stored in Amazon CloudWatch. For more information about the metrics stored in Amazon CloudWatch, see Monitor IPAM with Amazon CloudWatch. Use the Amazon CloudWatch options in the AWS CLI Reference to view metrics for allocations in your IPAM pools and scopes.

If you find that the CIDR that's provisioned for a pool is almost fully allocated, you might need to provision additional CIDRs. For more information, see Provision CIDRs to a pool.