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 uses the spanning-tree root primary and root secondary macro commands to configure a primary and backup root bridge without manually calculating priority values, and verifies IOS automatically selects an appropriate priority relative to the current root.
This hands-on lab configures Spanning Tree bridge priority across several VLANs in a single command using a VLAN range, rather than repeating the configuration individually for each VLAN, and verifies the priority was correctly applied to every VLAN in the range.
This hands-on lab configures PortFast on an access port connecting to an end-user device, bypassing the normal listening and learning delay so the port forwards traffic immediately, and covers why PortFast should never be applied to a port connecting to another switch.
This hands-on lab migrates a switch from classic PVST+ to Rapid PVST+, comparing the significantly faster convergence time and the updated port role terminology that comes with the newer protocol.
This hands-on lab bundles two physical links between switches into a single logical EtherChannel using static, PAgP, and LACP modes in turn, verifies each bundle forms correctly, and demonstrates the mismatched-mode failure that prevents a bundle from forming.
This hands-on lab configures switchport dynamic desirable and dynamic auto modes, demonstrating how Dynamic Trunking Protocol automatically negotiates whether a link becomes a trunk or remains an access port, and covers why relying on DTP is generally discouraged in production networks.
This hands-on lab configures a default gateway on a Layer 2 switch's management interface so it can be reached and managed from a remote subnet, and distinguishes this from a router's own default route used to reach networks beyond its directly connected interfaces.
This hands-on lab uses CDP to discover directly connected Cisco devices without any prior configuration knowledge of the neighboring device, and covers disabling CDP on a specific interface for security reasons while leaving it active elsewhere.
This hands-on lab enables LLDP, the vendor-neutral equivalent of CDP, on a Cisco device connected to non-Cisco equipment, and compares its verification output directly against CDP to highlight the similarities and differences between the two protocols.
This hands-on lab triggers a port security violation that places a port into err-disabled state, then configures automatic errdisable recovery so the port re-enables itself after a timeout instead of requiring manual intervention.
This hands-on lab configures inter-VLAN routing using a single router interface divided into subinterfaces, connecting to a switch trunk to route traffic between two VLANs through one physical link.
This hands-on lab configures inter-VLAN routing using Switch Virtual Interfaces on a Layer 3 switch, enabling IP routing directly on the switch itself and comparing this approach against the router-on-a-stick method from the previous lab.
