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Version: 7.3

Devices

NetObserv SNMP makes it simple to add devices providing little more than an IP address, SNMP credentials and one or more Device Groups.

The location of the device definition files is specified by EF_INPUT_SNMP_DEVICE_DEFINITIONS_DIRECTORY_PATH in the collectors configuration options. The default location is /etc/elastiflow/snmp/devices.

SNMP v1/v2c Example​

Full configuration:

example1.elastiflow.com:
  ip: 192.0.2.1
  port: 161
  poll_interval: 60
  timeout: 3000
  retries: 2
  exponential_timeout: false
  version: 2c
  communities:
    - public
  device_groups:
    - cisco_c1000

When using the defaults:

example1.elastiflow.com:
  ip: 192.0.2.1
  version: 2c
  communities:
    - public
  device_groups:
    - cisco_c1000

SNMP v3 Example​

Full configuration:

example2.elastiflow.com:
  ip: 192.0.2.2
  port: 161
  poll_interval: 60
  timeout: 3000
  retries: 2
  exponential_timeout: false
  version: 3
  v3_credentials:
    - username: elastiflow
      authentication_protocol: sha
      authentication_passphrase: efauthpassword
      privacy_protocol: des
      privacy_passphrase: efprivpassword
  device_groups:
    - cisco_c1000

When using the defaults:

example2.elastiflow.com:
  ip: 192.0.2.2
  version: 3
  v3_credentials:
    - username: elastiflow
      authentication_protocol: sha
      authentication_passphrase: efauthpassword
      privacy_protocol: des
      privacy_passphrase: efprivpassword
  device_groups:
    - cisco_c1000

Global Device Defaults​

The location of the global default device definition file is specified by EF_INPUT_SNMP_DEFAULTS_DIRECTORY_PATH in the collectors configuration options. The file in this directory must be named device.yml. The default location is /etc/elastiflow/snmp/defaults. This file will apply default values to every device definition where values are not provided (except the ip field).

Device Defaults Example​

Defaults file:

default:
  port: 200
  timeout: 4000
  retries: 4
  exponential_timeout: true
  version: 2c
  communities:
    - sith
    - lord
  device_groups:
    - generic
  poll_interval: 90
  max_oids: 64

Device file:

mydevice:
  ip: 192.0.2.1

Resulting definition:

mydevice:
  ip: 192.0.2.1
  port: 200
  timeout: 4000
  retries: 4
  exponential_timeout: true
  version: 2c
  communities:
    - sith
    - lord
  device_groups:
    - generic
  poll_interval: 90
  max_oids: 64

Configuration Attributes​

ip​

The IP address of the device to which SNMP requests will be sent.

EXAMPLE: ip: 192.0.2.2

port (optional)​

The UDP port on which the device listens for SNMP requests.

  • Default
    • 161

poll_interval (optional)​

The interval, in seconds, between collection of attributes applicable to the device.

  • Default
    • 60
info

Currently only device-level polling intervals are supported. A future enhancement will include support for object-level interval override of the device-level value.

timeout (optional)​

The time to wait, in milliseconds, for a response to an SNMP request.

  • Default
    • 3000

retries (optional)​

The number of times to retry a failed SNMP request before the task is cancelled.

  • Default
    • 2

exponential_timeout (optional)​

Defines whether the timeout interval should remain static (false) for each retry, or increase exponentially (true).

  • Default
    • false

version​

Specifies the SNMP version to use when polling this device. Valid values are:

  • Valid Values
    • 1, 2c, 3

communities​

If version is 1 or 2c a list of communities must be provided. The collector will attempt to find a valid community from the list and will use that community for all subsequent polls.

EXAMPLE:

communities:
  - public
  - elastiflow

v3_credentials​

If version is 3 a list of SNMPv3 credentials must be provided. The collector will attempt to find valid credentials from the list and will use those credentials for all subsequent polls.

EXAMPLE:

v3_credentials:
  - username: elastiflow
    authentication_protocol: sha
    authentication_passphrase: efauthpassword
    privacy_protocol: des
    privacy_passphrase: efprivpassword

username​

The username used to authenticate with the device using SNMPv3.

authentication_protocol​

The authentication protocol used to authenticate the username with the device using SNMPv3.

authentication_passphrase​

The authentication passphrase used to authenticate the username with the device using SNMPv3.

privacy_protocol​

The privacy protocol used to encrypt SNMPv3 traffic between the SNMP input and the device.

privacy_passphrase​

The privacy passphrase used to encrypt SNMPv3 traffic between the SNMP input and the device.

device_groups​

Defines a list of Device Groups which the Device may implement.