SwitchSketch

SwitchSketch is a web app (with optional desktop agent) for learning and validating switching concepts by turning diagrams into realistic switch configs and checks. Users sketch a topology (VLANs, trunks, access ports, STP roots, EtherChannels), then the app generates vendor-agnostic intent plus Cisco/Arista-style snippets and runs a rules-based “sanity check” to flag common errors: native VLAN mismatches, missing allowed VLANs, STP mis-roots, LACP mode conflicts, and asymmetric trunking. It includes bite-sized scenarios aligned to CCNA/CCNP-level switching concepts and a “break/fix” mode that intentionally introduces faults. This is a combination app: traditional deterministic validation plus AI explanations that teach why a design fails and how to fix it. It’s not a full emulator; it’s a fast feedback trainer and pre-check tool that saves time and reduces confusion.