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 configures IP SLA-based object tracking on an HSRP-enabled router, automatically lowering its priority when its WAN uplink fails, forcing failover to the standby router without requiring a full interface shutdown.
This hands-on lab presents a multi-layer connectivity failure across VLANs, trunking, routing, and NAT simultaneously, requiring systematic bottom-up troubleshooting to identify and correct three independent faults before full connectivity is restored.
This hands-on lab configures Root Guard on switch ports facing access-layer switches to prevent an unauthorized or misconfigured switch from becoming the Spanning Tree root, verifying the port enters a root-inconsistent state when a superior BPDU is received.
This hands-on lab configures BPDU Guard globally for PortFast-enabled ports and demonstrates the distinct, riskier behavior of BPDU Filter, comparing how each responds when a switch is connected to an access port that should only ever see end-user devices.
This hands-on lab configures Loop Guard on a switch's non-designated ports to prevent a unidirectional link failure from causing a Layer 2 loop, simulating a one-way BPDU loss and verifying the affected port enters a loop-inconsistent blocking state rather than incorrectly transitioning to forwarding.
This hands-on lab configures UDLD in aggressive mode on a fiber link between two switches, simulating a unidirectional fiber failure and verifying UDLD detects the mismatch and shuts down the affected port before a Layer 2 loop can form.
This hands-on lab configures Flex Links between two uplinks on an access switch, providing sub-second failover without relying on Spanning Tree at all, and verifies traffic automatically shifts to the backup link when the primary fails.
This hands-on lab configures PVLAN Edge (protected ports) on two access ports within the same VLAN, isolating them from each other at Layer 2 while both retain normal connectivity to an uplink port, demonstrating a lightweight isolation feature that requires no separate VLAN.
This hands-on lab configures storm control thresholds on a switch port to limit broadcast and multicast traffic, simulating a broadcast storm and verifying the switch suppresses excess traffic before it can overwhelm the network.
This hands-on lab configures a VLAN Access Control List using a VLAN access-map to filter traffic within a single VLAN at Layer 2, something a standard router-applied ACL cannot achieve since traffic never leaves the VLAN to reach a routed interface.
This hands-on lab configures a full Private VLAN structure with a primary VLAN and both isolated and community secondary VLANs, demonstrating fine-grained Layer 2 isolation within a single IP subnet beyond what the simple protected-port feature from an earlier lab can achieve.
This hands-on lab configures SVI autostate exclude on a monitoring port within a VLAN, preventing that single inactive port from incorrectly bringing down the SVI for an entire VLAN that still has other active member ports.
