A Cisco Router Lab is a hands-on practice environment for learning, configuring, and troubleshooting Cisco networks from the foundational CCNA level all the way to the expert CCIE level.
This hands-on lab manually sets a router's OSPF Router ID rather than relying on automatic selection from interface addresses, and verifies the change requires an OSPF process restart to take effect.
This hands-on lab configures a passive interface in OSPF so a LAN-facing interface still advertises its network while no longer sending or accepting OSPF hello packets on it, preventing unnecessary neighbor formation and unauthorized adjacencies on access-layer ports.
This hands-on lab uses debug ip ospf adj to observe the live OSPF neighbor formation process in real time, and deliberately introduces a hello/dead timer mismatch to show exactly how the debug output reveals the resulting adjacency failure.
This hands-on lab configures OSPF over a non-broadcast multi-access topology using manually specified neighbor statements, since this network type cannot rely on multicast hello packets to automatically discover neighbors.
This hands-on lab configures OSPF using the point-to-multipoint network type on a hub-and-spoke topology, comparing this approach against the manual neighbor statements required for non-broadcast networks in the previous lab.
This hands-on lab configures EIGRP between three routers using the network command, verifies neighbor relationships form, and confirms routes are exchanged, establishing the foundational EIGRP configuration workflow.
This hands-on lab configures EIGRP using precise wildcard masks in the network command to advertise only specific subnets rather than entire classful networks, giving finer control over exactly which interfaces participate in EIGRP.
This hands-on lab enables EIGRP's legacy automatic summarization feature on a router with discontiguous subnets, observing the routing problem it creates, then disables it to restore correct connectivity.
This hands-on lab configures a passive interface in EIGRP to stop routing updates from being sent out a LAN-facing interface while the network remains advertised, mirroring the same security and efficiency rationale covered earlier for OSPF passive interfaces.
This hands-on lab manually configures interface-level route summarization in EIGRP, advertising a single aggregated route instead of several specific subnets, and verifies the automatically created Null0 discard route that prevents summarization-related loops.
This hands-on lab examines the EIGRP topology table directly, identifying the successor and feasible successor for a destination network, and demonstrates how this underlying data explains what appears in the IP routing table.
This hands-on lab configures HSRP between two routers sharing a virtual gateway address, sets priority and preempt to control which router is active, and verifies automatic failover when the active router fails.
