KnowledgeBaseInfraSwitchingSwitchingLayer-2 notes: VLANs, trunks, spanning tree and the port-level details that cause most of the tickets. Pages land here as they are written.VLAN & Trunk Cheat SheetVLANs, access and trunk ports, native VLAN, spanning tree and the show commands, for Cisco IOS and Junos side by side.