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Dell EMC Networking OS Configuration Guide for the S5048F–ON System 9.14.2.8

Enabling an SNMP Agent to Notify Syslog Server Failure

You can configure a network device to send an SNMP trap if an audit processing failure occurs due to loss of connectivity with the syslog server.

If a connectivity failure occurs on a syslog server that is configured for reliable transmission, an SNMP trap is sent and a message is displayed on the console.

The SNMP trap is sent only when a syslog connection fails and the time-interval between the last syslog notification and current time is greater than or equal to 5 minutes. This restriction also applies to the console message.

NOTE If a syslog server failure event is generated before the SNMP agent service starts, the SNMP trap is not sent.

To enable an SNMP agent to send a trap when the syslog server is not reachable, enter the following command:

CONFIGURATION MODE
snmp-server enable traps snmp syslog-unreachable

To enable an SNMP agent to send a trap when the syslog server resumes connectivity, enter the following command:

CONFIGURATION MODE
snmp-server enable traps snmp syslog-reachable
Table 1. List of Syslog Server MIBS that have read accessList of Syslog Server MIBS that have read access
MIB Object OID Object Values Description
dF10SysLogTraps 1.3.6.1.4.1.6027.3.30.1.1 1 = reachable2 = unreachable Specifies whether the syslog server is reachable or unreachable.
The following example shows the SNMP trap that is sent when connectivity to the syslog server is lost:
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (19738) 0:03:17.38     SNMPv2-MIB::snmpTrapOID.0 = OID: SNMPv2-
SMI::enterprises.6027.3.30.1.1.1       SNMPv2-SMI::enterprises.6027.3.30.1.1 = STRING: "NOT_REACHABLE: Syslog server 
10.11.226.121 (port: 9140) is not reachable" SNMPv2-SMI::enterprises.6027.3.6.1.1.2.0 = INTEGER: 2
Following is the sample audit log message that other syslog servers that are reachable receive:
Oct 21 00:46:13: dv-fedgov-s4810-6: %EVL-6-NOT_REACHABLE:Syslog server 10.11.226.121 (port: 9140) is not reachable
Following example shows the SNMP trap that is sent when connectivity to the syslog server is resumed:
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (10230) 0:01:42.30     SNMPv2-MIB::snmpTrapOID.0 = OID: SNMPv2-
SMI::enterprises.6027.3.30.1.1.2       SNMPv2-SMI::enterprises.6027.3.30.1.1 = STRING: "REACHABLE: Syslog server 
10.11.226.121 (port: 9140) is reachable"SNMPv2-SMI::enterprises.6027.3.6.1.1.2.0 = INTEGER: 2
Following is the sample audit log message that other syslog servers that are reachable receive:
Oct 21 05:26:04: dv-fedgov-s4810-6: %EVL-6-REACHABLE:Syslog server 10.11.226.121 (port: 9140) is reachable

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