A collection of Cisco networking tutorials and example configurations.
A step-by-step guide for configuring a Cisco 1921 router and Catalyst 2960L switch from scratch.
Configure PAT (overload), static NAT, and port forwarding on the 1921. Includes verification commands and troubleshooting tips.
Segment your network with VLANs on the C2960L switch and route between them using router-on-a-stick sub-interfaces on the 1921.
A concise reference for the most-used Cisco IOS CLI commands — navigation, interfaces, routing, VLANs, NAT, ACLs, DHCP, and troubleshooting.