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DevOps & Automation · Foundational

Simple Network Management Protocol (SNMP)

A traditional UDP-based protocol for monitoring and managing network devices using MIBs, polling (ports 161) and traps (port 162).

Definition

Managers poll agents with Get/GetNext/GetBulk and set values with Set; agents send traps or informs. SNMPv3 adds authentication and encryption. Its polling model and limited configuration support led to model-driven alternatives.

Example

snmpwalk -v3 -u monitor -l authPriv -a SHA -A ... -x AES -X ... r1 IF-MIB::ifHCInOctets

Exam tip

Compare with automation APIs: SNMP is poll-based and weak for configuration; NETCONF/gNMI are model-driven.

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