SNMPWalk is a command-line tool used to query SNMP-enabled devices and retrieve a tree of available management information. It is widely used in monitoring and network troubleshooting.
What SNMPWalk does
It sends SNMP GETNEXT requests repeatedly, walking through an object identifier tree and printing values exposed by the device.
Why it is useful
SNMPWalk helps discover which metrics a device exposes: interface counters, system information, uptime, hardware details and vendor-specific values.
Typical workflow
Start with a known community string or SNMPv3 credentials, query the device and identify the OIDs that matter for monitoring.
Security note
Use SNMPv3 when possible. Older SNMP versions rely on community strings that are easy to leak and should be restricted by firewall rules.