SNMP Trap: DNS status

A trap is generated if DNS is not configured.

Identification

  • The originating IP / hostname is used to identify the system generating the traps
  • The NMS is responsible for associating traps with each managed system, along with clearing of alarms and escalation to the relevant system operator
  • The trap OID is generic for various SNMP events monitored by the system
  • The SNMP system name is included as part of the variable binding to assist identification:
.iso.org.dod.internet.mgmt.mib-2.system.sysName.0 = standalone

Trap OID

.iso.org.dod.internet.mgmt.mib-2.dismanEventMIB.dismanEventMIBNotificationPrefix. dismanEventMIBNotifications.mteTriggerFired

Variable Bindings - DNS not configured.

  • .iso.org.dod.internet.mgmt.mib-2.system.sysUpTime.0 = 2 minutes (12065)
  • snmpTrapOID = mteTriggerFired
  • .iso.org.dod.internet.mgmt.mib-2.dismanEventMIB.dismanEventMIBNotificationPrefix. dismanEventMIBNotificationObjects.mteHotTrigger.0 = ‘WARNING: No dns configured for <server info>’
  • .iso.org.dod.internet.mgmt.mib-2.dismanEventMIB.dismanEventMIBNotificationPrefix. dismanEventMIBNotificationObjects.mteHotValue.0 = 1
  • .iso.org.dod.internet.mgmt.mib-2.system.sysName.0 = standalone

Severity:

  • Urgent: WARNING: No dns configured for <server>

Resolution:

Configure a DNS for the system with network dns add <server>

Example: Urgent

Mar 20 12:13:50 robot-sl snmptrapd[1214]:
2019-03-20 12:13:50 <UNKNOWN>
[UDP: [192.168.100.3]:37298->[192.168.100.25]:162]:
#012iso.3.6.1.2.1.1.3.0 = Timeticks: (375782) 1:02:37.82
#011iso.3.6.1.6.3.1.1.4.1.0 = OID: iso.3.6.1.2.1.88.2.0.1
#011iso.3.6.1.2.1.88.2.1.1.0 = STRING: "WARNING: No dns configured for VOSS-192.168.100.3"
#011iso.3.6.1.2.1.88.2.1.3.0 = STRING: "It is recommended that the dns is configured.
  To configure dns use the following command: network dns <server1> <server2>"
#011iso.3.6.1.2.1.88.2.1.5.0 = INTEGER: 1
#011iso.3.6.1.2.1.1.5.0 = STRING: "VOSS"