Back again, haven't managed to get a spare moment to raise this with Extreme as of yet, however have perused their forums & came across this potential nugget of info here - worth pointing out that these relate to ExtremeXOS
https://community.extremenetworks.com/extreme/topics/problem_with_cpu_and_memory_monitoring_mibs
Am going to have a look at creating a poller around these & see how it pans out
Copy below from the above link
Credit to 'Sumit Tokle', Extreme Employee
Few useful SNMP OID,
Name extremeCpuMonitorTotalUtilization
OID .1.3.6.1.4.1.1916.1.32.1.2
Name extremeCpuMonitorMaxUtilization
OID .1.3.6.1.4.1.1916.1.32.1.3.1.12
Name: extremeCpuMonitorCurrentUtilization
OID .1.3.6.1.4.1.1916.1.32.1.6.0
Name: extremeSwMonitorCpuUtilization
OID: .1.3.6.1.4.1.1916.1.32.3.0.1
Name: extremeMemoryMonitorSystemTable
OID: .1.3.6.1.4.1.1916.1.32.2.2
Name extremeMemoryMonitorSystemFree
OID: .1.3.6.1.4.1.1916.1.32.2.2.1.3
Name: extremeMemoryMonitorSystemUsage
OID: .1.3.6.1.4.1.1916.1.32.2.2.1.4
Name: extremeMemoryMonitorUserUsage
OID: .1.3.6.1.4.1.1916.1.32.2.2.1.5
Name: memoryTotal
OID: .1.3.6.1.4.1.3375.1.1.78.0
Name: memoryUsed
OID: .1.3.6.1.4.1.3375.1.1.77.0
Name: extremeMemoryMonitorSystemUsage
OID: .1.3.6.1.4.1.1916.1.32.2.2.1.4