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SNMP Configuration and Verification

Jul 1, 2025

Overview

This lecture demonstrates basic SNMP configuration and verification on Cisco devices using Packet Tracer and Boson NetSim, highlighting that SNMP configuration is not required for the CCNA exam.

SNMP Basics and Packet Tracer Lab

  • SNMP (Simple Network Management Protocol) is used for monitoring and managing network devices.
  • Packet Tracer supports limited SNMP functionality—only community string configuration is possible.
  • The main SNMP command in Packet Tracer is snmp-server community <string> <RO/RW>.
  • Read-only community: snmp-server community Cisco1 RO.
  • Read/write community: snmp-server community Cisco2 RW.
  • Using a PC's MIB Browser, OIDs like sysUpTime, sysName, ifNumber, ifDescr, ifType, and ifAdminStatus can be viewed.
  • SNMP Set operations can change object values, such as changing the router's hostname.

SNMP Practice Lab in Boson NetSim (CCNP Level)

  • SNMP configuration is not part of the CCNA exam but is covered in CCNP ENCOR labs.
  • Common SNMP commands: snmp-server contact, community, host, and location.
  • Example configuration:
    • snmp-server community Boson RO
    • snmp-server contact [email protected]
    • snmp-server location R1_SNMP
    • snmp-server host 10.10.0.2 snmp_logs
  • Verifying SNMP configuration with show commands:
    • show snmp community, show snmp location, show snmp contact, show snmp host
  • SNMP traps are sent to UDP port 162 by default.

Key Terms & Definitions

  • SNMP (Simple Network Management Protocol) — Protocol for monitoring and managing network devices.
  • Community String — Password-like value for SNMP access (RO = read-only, RW = read/write).
  • OID (Object Identifier) — Unique value identifying a managed object in SNMP.
  • MIB (Management Information Base) — Database of network management information used by SNMP.
  • Trap — Notification sent from an SNMP agent to a management station.
  • Read-Only — SNMP access level allowing only data retrieval.
  • Read/Write — SNMP access level allowing both data retrieval and changes.

Action Items / Next Steps

  • Practice configuring SNMP communities and using the MIB Browser in Packet Tracer.
  • Review the show commands for verifying SNMP configuration.
  • No need to memorize SNMP commands for CCNA; revisit for CCNP studies.

Full transcript