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To achieve this, one needs to use an OID.
In the Simple Network Management Protocol (SNMP), OID means an 'Object Identifier'.
To define OID, it's an address used to uniquely identify managed devices and their statuses.
In FortiGate, there are two SNMP traps, so enable 'HA cluster status change and HA heartbeat interface failure'.
So that when there is a failover, the FortiGate will send a HA cluster status change trap to the SNMP managers.
- HA cluster status change (fgtraphastatuschange).
- HA heartbeat interface failure (fgtraphahbfail).
OIDs for HA in FortiGate are those that can be mentioned in the SNMP manager.
| OID |
TRAPS |
DESCRIPTION |
| 1.3.6.1.4.1.12356.101.2.0.402 |
fgTrapHaStateChange |
The trap is sent when the HA cluster member changes its state.
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| 1.3.6.1.4.1.12356.101.2.0.401 |
fgTrapHaSwitch |
The specified cluster member has transitioned from a secondary role to a primary role.
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| 1.3.6.1.4.1.12356.101.2.0.403 |
fgTrapHaHBFail |
The heartbeat device failure count has exceeded the configured threshold.
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| 1.3.6.1.4.1.12356.101.2.0.404 |
fgTrapHaMemberDown |
The specified device (by serial number) is moving to a down state.
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| 1.3.6.1.4.1.12356.101.2.0.405 |
fgTrapHaMemberUp |
A new cluster member has joined the cluster.
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Once the required OID is mentioned and whenever the OID gets triggered user will receive an alert indicating changes happened as per the OID.
To get the values, one can do an SNMP walk for the OID values with any free SNMP walk software.
Related article:
Technical Tip: OIDs for monitoring HA
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