Installation

Network Device Monitoring relies on the SNMP Integration included in the Datadog Agent package, and supports all three versions of SNMP: SNMPv1, SNMPv2, and SNMPv3. During discovery, the SNMP port (default 161) is polled. A device is considered discovered if there is a response and a matching profile.

Pre-requisites

Agent v7.32+

How it works

The following diagram illustrates the default ports and protocols between the Datadog Agent and the device being monitored. For SNMP metrics, the Datadog Agent polls the devices with Autodiscovery, or based on manual device IP configuration. The Datadog Agent, configured with NDM and deployed on-premises or in the cloud, consolidates all collected device and network data from your network and sends it to Datadog over HTTPS on port 443. This provides unified, full-stack observability of metrics, logs, traces, monitors, and dashboards.

Next steps

Follow the instructions below to configure Datadog to collect SNMP metrics from your network devices.

Configuration

Datadog Network Device Monitoring supports collecting metrics from individual devices, or auto-discovering devices (unique IP addresses) on entire subnets.

Choose your collection strategy based on the number of devices present on your network, and how dynamic your network is (meaning frequency of adding or removing devices):

Monitoring individual devices

For small and mostly static networks.

Autodiscovery

For larger or dynamic networks.

Regardless of the collection strategy, leverage Datadog’s sysObjectID mapped device profiles to automatically collect relevant metrics from your devices.

Monitoring individual devices

To monitor individual devices:

• Include the IP address and any additional devices metadata (as tags) in the snmp.d/conf.yaml file in the conf.d/ folder at the root of your Agent’s configuration directory. See the sample snmp.d/conf.yaml for all available configuration options.

• Restart the Agent.

After setup, the Agent collects relevant metrics by matching your devices to one of Datadog’s supported device profiles.

To expand your setup:

• Add more instances to collect metrics from more devices on your network.
• Use Autodiscovery if you need to collect metrics from lots of devices across a dynamic network.

Autodiscovery

An alternative to specifying individual devices is to use Autodiscovery to automatically discover all the devices on your network.

Autodiscovery polls each IP on the configured subnet, and checks for a response from the device. Then, the Datadog Agent looks up the sysObjectID of the discovered device and maps it to one of Datadog’s supported device profiles. The profiles contain lists of predefined metrics to collect for various types of devices.

To use Autodiscovery with Network Device Monitoring:

1. Install or upgrade the Datadog Agent to v7.27+. For platform specific instructions, see the Datadog Agent documentation.

2. Edit the datadog.yaml Agent configuration file to include all the subnets for Datadog to scan. The following sample config provides required parameters, default values, and examples for Autodiscovery.

network_devices:
  autodiscovery:
    workers: 100  # number of workers used to discover devices concurrently
    discovery_interval: 3600  # interval between each autodiscovery in seconds
    loader: core  # use core check implementation of SNMP integration. recommended
    use_device_id_as_hostname: true  # recommended
    configs:
      - network_address: 10.10.0.0/24  # CIDR subnet
        loader: core
        snmp_version: 2
        port: 161
        community_string: '***'  # enclose with single quote
        tags:
        - "key1:val1"
        - "key2:val2"
      - network_address: 10.20.0.0/24
        loader: core
        snmp_version: 2
        port: 161
        community_string: '***'
        tags:
        - "key1:val1"
        - "key2:val2"

network_devices:
  autodiscovery:
    workers: 100  # number of workers used to discover devices concurrently
    discovery_interval: 3600  # interval between each autodiscovery in seconds
    loader: core  # use core check implementation of SNMP integration. recommended
    use_device_id_as_hostname: true  # recommended
    configs:
      - network_address: 10.10.0.0/24  # CIDR subnet
        snmp_version: 3
        user: 'user'
        authProtocol: 'SHA256'  # choices: MD5, SHA, SHA224, SHA256, SHA384, SHA512
        authKey: 'fakeKey'  # enclose with single quote
        privProtocol: 'AES256'  # choices: DES, AES, AES192, AES192C, AES256, AES256C
        privKey: 'fakePrivKey'  # enclose with single quote
        tags:
          - 'key1:val1'
          - 'key2:val2'
      - network_address: 10.20.0.0/24
        snmp_version: 3
        user: 'user'
        authProtocol: 'SHA256'
        authKey: 'fakeKey'
        privProtocol: 'AES256'
        privKey: 'fakePrivKey'
        tags:
          - 'key1:val1'
          - 'key2:val2'

Note: The Datadog Agent automatically configures the SNMP check with each of the IPs that are discovered. A discovered device is an IP that responds successfully when being polled using SNMP.

Note: Make sure you are on Agent 7.54+ for this syntax. For previous versions, see the previous config_template.yaml

Validation

Run the Agent’s status subcommand and look for snmp under the Checks section.

Further Reading

Additional helpful documentation, links, and articles:

Using Profiles with Network Device MonitoringDOCUMENTATION SNMP Monitoring OverviewKNOWLEDGE CENTER Monitor SNMP with DatadogBLOG