Discovery is the process that capm uses to identify the devices on your network. Devices are identified using the IP domain, IP addresses, IP ranges, and hostnames that you specify in discovery profiles.
Discovery is the process that 
CA Performance Management
 uses to identify the devices on your network. Devices are identified using the IP domain, IP addresses, IP ranges, and hostnames that you specify in discovery profiles.
Attempts to discover devices are made through SNMP and ICMP protocols. If a device does not respond to SNMP but 
 respond to ICMP, a pingable device is created.
Inventory Discovery
Inventory discovery, or device discovery identifies the following information about devices:
  • Which protocols the device responds to, SNMP or ICMP
  • The classification of the device, such as router or switch
  • The device vendor, such as Cisco or Juniper
  • The device type, such as 7700 or 8200
Discovered devices and monitored components take up to 5 minutes to begin synchronizing with 
Performance Center
Discovered devices are automatically added to device collections depending on the rules that control each device collection membership. During the first synchronization between Data Aggregator and 
Performance Center
devices are discovered, the devices are added to collections.
You can use two methods to discover devices:
The following workflow offers a best practice to use as a quick reference when performing a discovery of your inventory.
Perform this process as either a user with the Administrator role or as the tenant administrator.
  1. To enable the Data Collector to perform queries of device MIB tables that use SNMP, create SNMP profiles.
    For more information, see SNMP Profiles.
  2. Create discovery profiles. For more information, see Discovery Profiles.
  3. Run discovery and view the results. For more information, see Run Discovery.  
Metric Family Discovery
Metric family discovery, also known as component discovery, is a separate process that determines whether a specific metric family is supported for a device.
A metric family defines the set of metrics to collect and report on for a given technology. The values of the metrics are normalized so that reporting is uniform regardless of the data source.
Polling begins automatically after metric family discovery completes.  Operational metrics are collected and retained at regular polling intervals for reporting. Examples of operational metrics include error rate, utilization, and bytes in. Configuration data represents or identifies a component or the component configuration, such as port type or component index.
For more information, see Configure Monitoring Profiles.
Quickly Discover Devices
You can quickly discover devices without having to configure SNMP profiles and discovery profiles manually.
Follow these steps:
  1. Hover over 
    , and click 
    Monitored Items Management: Quick Device Discovery
  2. Complete the following fields:
      IP Domain
      If you have multiple IP domains, select the IP domain for discovery.
      Community Name 
      (SNMPv1/v2c Only) Specify a secure string that lets the data source query the MIB of the associated device. The community that you supply must provide read access to the device MIB.
      Verify Community Name 
      Specify the Community Name again for verification.
      Specify the port that is used to make SNMP connections to your devices.
      : 161
      This port can also be used to send SNMP traps to trap receivers associated with this profile through notifications. In this scenario, use 162 by default. For more information, see Configure Notifications.
      Specify the IP address ranges that you want to discover for IPv4. Range discovery is not supported for IPv6 addresses.
  3. Click 
    CA Performance Management
     discovers the devices within the specified IP addresses and hostnames, and adds the devices to the system inventory.
Discover Devices
If you do not use quick discovery, you can configure SNMP profiles and discovery profiles manually.
The following video shows the detailed discovery process starting with the required setup:

Follow these steps:
  1. Configure SNMP Profiles.
  2. Configure IP Domains.
  3. Configure Discovery Profiles.