Arista EOS Device Health Check

Structured triage procedure for assessing Arista EOS device health. Produces a prioritized findings report with severity classifications and recommended actions.

EOS runs on a Linux kernel with individual processes (agents) managing each protocol and subsystem. This architecture means Linux-native tools (bash top, bash df, bash dmesg) are valid supplements to EOS show commands. Agent health is a first-class concern — a crashed or stuck agent can silently affect a subsystem even when aggregate device metrics look normal.

The procedure covers core device health first, then extends to MLAG and VXLAN/EVPN for data center deployments.

When to Use