intermediate·20 min·Paid
The Patch Panel Labels Are Wrong
Use LLDP to find the real topology, then fix routes written from the wrong one.
Scenario
Three routers were recabled during a cupboard tidy-up and the port labels were not updated afterwards. The static routes on the middle router were written from the old labels, so each branch's traffic is being sent out of the interface facing the other one. Nothing is reachable end to end. Use the link-layer discovery protocol to find out which router is actually on each interface, then correct the routes to match.
Learning objectives
- lldp
- neighbour discovery
- static routing
- troubleshooting
Topology and configuration
This environment contains 3 devices (3 Routers). You configure and troubleshoot the networking skills listed above.
Curriculum topics
Certification objectives
- ccna-200-301 · Objective 2.3: Configure and verify Layer 2 discovery protocols (CDP, LLDP)
- comptia-network-plus-n10-009 · Objective 5.5: Given a scenario, troubleshoot and resolve general networking issues