The official template for monitoring Arista switches via SNMP (https://www.zabbix.com/integrations/arista#arista_snmp) contains an error in the calculation of RAM utilization, leading to incorrect trigger alerts. This issue is particularly evident in switches running newer firmware versions where a new OID is used for "memory in use." 

Problem Details:

The SNMP template currently includes OIDs that calculate memory utilization using the hrStorage values. However, these calculations are not aligned with the vendor's recommendations and include memory from buffers and cache.
Arista's latest firmware introduces OID 100, which is intended to represent "memory in use" more accurately. 

Attachments:

1. Vendor Docs: https://arista.my.site.com/AristaCommunity/s/article/memory-utilization-on-eos-devices
2. MIB file for Arista devices: http://www.net-snmp.org/docs/mibs/HOST-RESOURCES-TYPES.txt
3. Screenshot showing the incorrect memory utilization calculation in Zabbix:
   
4. Example SNMP walk output for hrStorage and related OIDs.

   HOST-RESOURCES-MIB::hrStorageIndex.1 = INTEGER: 1
   HOST-RESOURCES-MIB::hrStorageIndex.2 = INTEGER: 2
   HOST-RESOURCES-MIB::hrStorageIndex.3 = INTEGER: 3
   HOST-RESOURCES-MIB::hrStorageIndex.4 = INTEGER: 4
   HOST-RESOURCES-MIB::hrStorageIndex.5 = INTEGER: 5
   HOST-RESOURCES-MIB::hrStorageIndex.6 = INTEGER: 6
   HOST-RESOURCES-MIB::hrStorageIndex.7 = INTEGER: 7
   HOST-RESOURCES-MIB::hrStorageIndex.8 = INTEGER: 8
   HOST-RESOURCES-MIB::hrStorageIndex.100 = INTEGER: 100
   HOST-RESOURCES-MIB::hrStorageType.1 = OID: HOST-RESOURCES-TYPES::hrStorageRam
   HOST-RESOURCES-MIB::hrStorageType.2 = OID: HOST-RESOURCES-TYPES::hrStorageRam
   HOST-RESOURCES-MIB::hrStorageType.3 = OID: HOST-RESOURCES-TYPES::hrStorageRam
   HOST-RESOURCES-MIB::hrStorageType.4 = OID: HOST-RESOURCES-TYPES::hrStorageFlashMemory
   HOST-RESOURCES-MIB::hrStorageType.5 = OID: HOST-RESOURCES-TYPES::hrStorageVirtualMemory
   HOST-RESOURCES-MIB::hrStorageType.6 = OID: HOST-RESOURCES-TYPES::hrStorageVirtualMemory
   HOST-RESOURCES-MIB::hrStorageType.7 = OID: HOST-RESOURCES-TYPES::hrStorageVirtualMemory
   HOST-RESOURCES-MIB::hrStorageType.8 = OID: HOST-RESOURCES-TYPES::hrStorageVirtualMemory
   HOST-RESOURCES-MIB::hrStorageType.100 = OID: HOST-RESOURCES-TYPES::hrStorageRam
   HOST-RESOURCES-MIB::hrStorageDescr.1 = STRING: RAM
   HOST-RESOURCES-MIB::hrStorageDescr.2 = STRING: RAM (Buffers)
   HOST-RESOURCES-MIB::hrStorageDescr.3 = STRING: RAM (Cache)
   HOST-RESOURCES-MIB::hrStorageDescr.4 = STRING: Flash
   HOST-RESOURCES-MIB::hrStorageDescr.5 = STRING: Tmp
   HOST-RESOURCES-MIB::hrStorageDescr.6 = STRING: Root
   HOST-RESOURCES-MIB::hrStorageDescr.7 = STRING: Log
   HOST-RESOURCES-MIB::hrStorageDescr.8 = STRING: Core
   HOST-RESOURCES-MIB::hrStorageDescr.100 = STRING: RAM (Unavailable)
   HOST-RESOURCES-MIB::hrStorageAllocationUnits.1 = INTEGER: 1024 Bytes
   HOST-RESOURCES-MIB::hrStorageAllocationUnits.2 = INTEGER: 1024 Bytes
   HOST-RESOURCES-MIB::hrStorageAllocationUnits.3 = INTEGER: 1024 Bytes
   HOST-RESOURCES-MIB::hrStorageAllocationUnits.4 = INTEGER: 4096 Bytes
   HOST-RESOURCES-MIB::hrStorageAllocationUnits.5 = INTEGER: 4096 Bytes
   HOST-RESOURCES-MIB::hrStorageAllocationUnits.6 = INTEGER: 4096 Bytes
   HOST-RESOURCES-MIB::hrStorageAllocationUnits.7 = INTEGER: 4096 Bytes
   HOST-RESOURCES-MIB::hrStorageAllocationUnits.8 = INTEGER: 4096 Bytes
   HOST-RESOURCES-MIB::hrStorageAllocationUnits.100 = INTEGER: 1024 Bytes
   HOST-RESOURCES-MIB::hrStorageSize.1 = INTEGER: 8147100
   HOST-RESOURCES-MIB::hrStorageSize.2 = INTEGER: 8147100
   HOST-RESOURCES-MIB::hrStorageSize.3 = INTEGER: 8147100
   HOST-RESOURCES-MIB::hrStorageSize.4 = INTEGER: 1860826
   HOST-RESOURCES-MIB::hrStorageSize.5 = INTEGER: 16384
   HOST-RESOURCES-MIB::hrStorageSize.6 = INTEGER: 305517
   HOST-RESOURCES-MIB::hrStorageSize.7 = INTEGER: 203678
   HOST-RESOURCES-MIB::hrStorageSize.8 = INTEGER: 203678
   HOST-RESOURCES-MIB::hrStorageSize.100 = INTEGER: 8147100
   HOST-RESOURCES-MIB::hrStorageUsed.1 = INTEGER: 5929192
   HOST-RESOURCES-MIB::hrStorageUsed.2 = INTEGER: 360908
   HOST-RESOURCES-MIB::hrStorageUsed.3 = INTEGER: 3701292
   HOST-RESOURCES-MIB::hrStorageUsed.4 = INTEGER: 603976
   HOST-RESOURCES-MIB::hrStorageUsed.5 = INTEGER: 0
   HOST-RESOURCES-MIB::hrStorageUsed.6 = INTEGER: 21182
   HOST-RESOURCES-MIB::hrStorageUsed.7 = INTEGER: 35893
   HOST-RESOURCES-MIB::hrStorageUsed.8 = INTEGER: 0
   HOST-RESOURCES-MIB::hrStorageUsed.100 = INTEGER: 2183800
   HOST-RESOURCES-MIB::hrStorageAllocationFailures.1 = Counter32: 0
   HOST-RESOURCES-MIB::hrStorageAllocationFailures.2 = Counter32: 0
   HOST-RESOURCES-MIB::hrStorageAllocationFailures.3 = Counter32: 0
   HOST-RESOURCES-MIB::hrStorageAllocationFailures.4 = Counter32: 0
   HOST-RESOURCES-MIB::hrStorageAllocationFailures.5 = Counter32: 0
   HOST-RESOURCES-MIB::hrStorageAllocationFailures.6 = Counter32: 0
   HOST-RESOURCES-MIB::hrStorageAllocationFailures.7 = Counter32: 0
   HOST-RESOURCES-MIB::hrStorageAllocationFailures.8 = Counter32: 0
   HOST-RESOURCES-MIB::hrStorageAllocationFailures.100 = Counter32: 0