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IntermediatePublished 2026-07-04

SNMPv2c Read-Only Monitoring

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Configure Cisco IOS SNMPv2c read-only access on R1 so an NMS on a trusted management LAN can poll device status. You will add a read-only community string and device identity (location/contact), validate from IOS show commands, and confirm basic reachability from the MGMT host. No routing protocols or static routes are used; all devices share a single management subnet bridged by an L2 switch.

Track
Est. time
35 minutes
Difficulty
Intermediate
Topics

Learning objectives

  • Enable SNMPv2c read-only access on a Cisco IOS router using a learner-chosen community string
  • Populate SNMP system identity fields (location and contact) for NMS display
  • Explain why RO vs RW matters and when SNMPv2c is acceptable (trusted segments only)
  • Verify SNMP readiness with show commands and confirm basic IP reachability from the NMS host

Troubleshooting focus

  • If the ping from SRV-MGMT01 to 10.0.0.1 fails: check that R1 Ethernet0/0 and SRV-MGMT01 eth0 are up and correctly addressed; verify SW-LAB-ACC1 cabling.
  • If show snmp community on R1 shows nothing: you did not configure the community, or you mistyped the command.
  • If an external NMS test fails while local checks pass: ensure the NMS uses the exact community string and points to 10.0.0.1 on UDP/161.
  • If you accidentally configured RW: remove it and create an RO community to meet the policy requirement.

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How this lab is graded
  • Build it your way. Where a lab lets you choose a value — a VLAN name, an interface description — grading checks that you configured it, not which name you picked. Names that another line has to reference, like an ACL applied with access-class, are stated in the guide and do have to match.
  • Addresses, modes and protocol keywords are exact. An IP address, a subnet mask, switchport mode trunk, an encapsulation — these carry the meaning of the lab, so they are graded as written in the guide.
  • Grading reads your saved configuration. Export the lab from CML after you have configured it, and make sure anything you set is in the running-config — a change that only exists in a terminal session never reaches the grader.
  • You can submit as many times as you like. Your best score stands, and each attempt tells you which checks passed so you can work the gaps.
  • Scored something you believe is correct? Use Report an issue on this page — that is exactly how the grading fixes in the changelog got found.

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