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Dell Configuration Guide for the S4048–ON System 9.14.2.6

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Subscribing to Managed Object Value Updates using SNMP

By default, the Dell EMC Networking system displays some unsolicited SNMP messages (traps) upon certain events and conditions.

You can also configure the system to send the traps to a management station. Traps cannot be saved on the system.
Dell EMC Networking OS supports the following three sets of traps:
  • RFC 1157-defined traps — coldStart, warmStart, linkDown, linkUp, authenticationFailure, and egpNeighbborLoss.
  • Dell EMC Networking enterpriseSpecific environment traps — fan, supply, and temperature.
  • Dell EMC Networking enterpriseSpecific protocol traps — bgp, ecfm, stp, and xstp.

To configure the system to send SNMP notifications, use the following commands.

  1. Configure the Dell EMC Networking system to send notifications to an SNMP server.
    CONFIGURATION mode
    snmp-server host ip-address [traps | informs] [version 1 | 2c |3] [community-string]
    To send trap messages, enter the keyword traps.
    To send informational messages, enter the keyword informs.
    To send the SNMP version to use for notification messages, enter the keyword version.
    To identify the SNMPv1 community string, enter the name of the community-string.
  2. Specify which traps the Dell EMC Networking system sends to the trap receiver.
    CONFIGURATION mode
    snmp-server enable traps
    Enable all Dell EMC Networking enterprise-specific and RFC-defined traps using the snmp-server enable traps command from CONFIGURATION mode.
    Enable all of the RFC-defined traps using the snmp-server enable traps snmp command from CONFIGURATION mode.
  3. Specify the interfaces out of which Dell EMC Networking OS sends SNMP traps.
    CONFIGURATION mode
    snmp-server trap-source

Example of RFC-Defined SNMP Traps and Related Enable Commands

The following example lists the RFC-defined SNMP traps and the command used to enable each. The coldStart and warmStart traps are enabled using a single command.
snmp authentication   SNMP_AUTH_FAIL:SNMP Authentication failed.Request with invalid community string.
snmp coldstart        SNMP_COLD_START: Agent Initialized - SNMP COLD_START.
                      SNMP_WARM_START:Agent Initialized - SNMP WARM_START.
snmp linkdown         PORT_LINKDN:changed interface state to down:%d
snmp linkup           PORT_LINKUP:changed interface state to up:%d

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