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arista-device-health

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Arista EOS device health check and triage procedure. Use when troubleshooting Arista 7000, 7500, or 720X series switches — assessing CPU, memory, interfaces, environment, and agent/daemon health. Covers MLAG state validation and VXLAN/EVPN health as data center extension steps. EOS is Linux-native — standard Linux diagnostics (bash top, df, dmesg) are valid troubleshooting tools alongside EOS show commands. Includes agent health monitoring via show agent for EOS-specific daemon failure detection.

When to use

• Device reported as slow, dropping traffic, or unresponsive
• Scheduled health audit of Arista switches (leaf, spine, or border)
• Post-change verification after upgrades, patches, or configuration changes
• Capacity planning data collection for CPU, memory, and link utilization
• Incident response when an Arista switch is suspected as the fault domain
• MLAG inconsistency or split-brain detection in a data center pair
• VXLAN/EVPN overlay health assessment — VTEP reachability, BGP EVPN peering
• Agent crash or restart detected in syslog

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