FORTINET-MIB-280 :: fnSysMemUsage

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsFORTINET-MIB-280fnSysMemUsage

fnSysMemUsage

Module: FORTINET-MIB-280

OID (symbolic): FORTINET-MIB-280::fnSysMemUsage

OID (numeric): 1.3.6.1.4.1.12356.1.9

Node type: OBJECT-TYPE

Type: Gauge32

Access: read-only

Description: Instantaneous memory utilization

What is fnSysMemUsage?

This is the instantaneous memory utilization percentage of the FortiGate device. Admins watch this for signs of memory exhaustion, which can precede session drops or a reboot.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.12356.1.9
snmpwalk -v2c -c public <target> FORTINET-MIB-280::fnSysMemUsage

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.12356.1.9.1
snmpget -v2c -c public <target> FORTINET-MIB-280::fnSysMemUsage.1

Start monitoring Fortinet FortiGate security appliance (legacy firmware 2.80) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the FORTINET-MIB-280::fnSysMemUsage OID value, configure state conditions and alerts, and monitor any Fortinet FortiGate security appliance (legacy firmware 2.80) from a single console.

OID Breakdown

Upper-level ancestors (8 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.4privateAirPair-MIB
1.3.6.1.4.1enterprisesAirPair-MIB
1.3.6.1.4.1.12356fortinetFORTINET-300-MIB
1.3.6.1.4.1.12356.1fnSystemFORTINET-300-MIB
Numeric OIDNameModule
1.3.6.1.4.1.12356.1.9fnSysMemUsageFORTINET-MIB-280