IP Addressing Troubleshooting Capstone

Bundle lab · $29.99

Advanced CCNP lab focused on diagnosing and correcting IPv4 interface addressing issues on Cisco IOS routers. The lab ships pre-broken with two independently failing faults that the learner must find and fix using show commands and directed pings. No routing protocols or static routes are used — verification is limited to directly-connected neighbor and gateway reachability.

Learning objectives

• Use show ip interface brief and show running-config interface to detect addressing mismatches
• Diagnose a subnet mask mismatch on a router-to-router shared segment
• Identify and correct a wrong IP address on a host-facing gateway interface
• Validate directly-connected neighbor and gateway reachability with targeted pings
• Apply disciplined, deterministic IPv4 interface configuration (address + dotted-decimal mask + no shutdown)

Troubleshooting focus

• Correlate ping failures with interface summaries and per-interface running config
• Differentiate on-link vs off-subnet behavior driven by masks
• Confirm ARP and local vs routed decision-making for directly-connected subnets