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SNMP

Overview#

Flow records generally include the index of ingress and egress interfaces by which the network traffic traversed the exporting device. The ElastiFlow™ Unified Flow Collector will attempt to determine the names, and additional attributes, of these interfaces as learned by polling the exporting device using SNMP.

EF_FLOW_DECODER_ENRICH_NETIF_SNMP_ENABLE#

This setting determines whether SNMP polls will be used to gather these network interface attributes.

  • Valid Values
    • true, false
  • Default
    • false

EF_FLOW_DECODER_ENRICH_NETIF_SNMP_PORT#

If SNMP polling of attributes is enabled (EF_FLOW_DECODER_ENRICH_NETIF_SNMP_ENABLE is true), this setting specifies the UDP port that is used for such polls.

  • Default
    • 161 (the default SNMP port number)

EF_FLOW_DECODER_ENRICH_NETIF_SNMP_VERSION#

If SNMP polling of attributes is enabled (EF_FLOW_DECODER_ENRICH_NETIF_SNMP_ENABLE is true), this setting specifies the SNMP version that is used for such polls.

important

All network devices which may be polled MUST support this version of SNMP.

  • Valid Values
    • 1 - use SNMPv1
    • 2 - use SNMPv2c
  • Default
    • 2

EF_FLOW_DECODER_ENRICH_NETIF_SNMP_COMMUNITIES#

If SNMP polling of attributes is enabled (EF_FLOW_DECODER_ENRICH_NETIF_SNMP_ENABLE is true), this setting specifies the SNMP community strings that may be used for such polls. If a comma-separated list is specified, the collector will try each community in the order specified. Once a community returns a successful response the collector will remember this community for future polls of the device.

important

All network devices which may be polled MUST be configured to all visibility of collected attributes using this community. It may be necessary to specify a view associated with this community. The documentation for your devices should contain the necessary information that you will need for determining the correct configuration steps.

  • Example
    • public,private,whatever
  • Default
    • public

EF_FLOW_DECODER_ENRICH_NETIF_SNMP_TIMEOUT#

If SNMP polling of attributes is enabled (EF_FLOW_DECODER_ENRICH_NETIF_SNMP_ENABLE is true), this setting specifies the number of seconds to wait for the polled device to respond.

  • Default
    • 2

EF_FLOW_DECODER_ENRICH_NETIF_SNMP_RETRIES#

If SNMP polling of attributes is enabled (EF_FLOW_DECODER_ENRICH_NETIF_SNMP_ENABLE is true), this setting specifies the number of retries to attempt after the initial poll has timed out or otherwise fail. The timeout period will be doubled for each retry.

  • Default
    • 1