Subscribing to Managed Object Value Updates usingSNMPBy default, the Dell Networking system displays some unsolicited SNMP messages (traps) upon certainevents and conditions.You can also configure the system to send the traps to a management station. Traps cannot be saved onthe system.Dell Networking OS supports the following three sets of traps:• RFC 1157-defined traps — coldStart, warmStart, linkDown, linkUp, authenticationFailure, andegpNeighbborLoss.• Dell Networking enterpriseSpecific environment traps — fan, supply, and temperature.• Dell 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 Networking system to send notifications to an SNMP server.CONFIGURATION modesnmp-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 Networking system sends to the trap receiver.CONFIGURATION modesnmp-server enable trapsEnable all Dell Networking enterprise-specific and RFC-defined traps using the snmp-serverenable traps command from CONFIGURATION mode.Enable all of the RFC-defined traps using the snmp-server enable traps snmp command fromCONFIGURATION mode.3. Specify the interfaces out of which Dell Networking OS sends SNMP traps.CONFIGURATION modesnmp-server trap-sourceExample of RFC-Defined SNMP Traps and Related Enable CommandsThe following example lists the RFC-defined SNMP traps and the command used to enable each. ThecoldStart and warmStart traps are enabled using a single command.snmp authentication SNMP_AUTH_FAIL:SNMP Authentication failed.Request withinvalid community string.snmp coldstart SNMP_COLD_START: Agent Initialized - SNMP COLD_START.Simple Network Management Protocol (SNMP) 845
