Networking cheat sheets

Switching and routing references for Cisco, Juniper, FortiGate, HPE Aruba and Ubiquiti: interface state, VLANs and trunks, routing tables, neighbour discovery and ARP.

11 free references in this topic. Each lists the command, what it inspects and how to read the result.

• Cisco IOS essentials — Get oriented, inspect interfaces, and understand your device.
• Cisco VLANs & trunks — Understand access VLANs, tagged links, and Layer 2 boundaries.
• Cisco interface diagnostics — Find link failures and read the counters that matter.
• Cisco neighbor discovery — Map the devices directly connected to your switch.
• Cisco routing basics — Read connected, static, and learned routes with confidence.
• FortiGate routing & ARP — Follow a packet from its next hop to the routing table.
• HPE Aruba CX switching essentials — Inspect AOS-CX switch interfaces and VLANs with platform-specific commands.
• Juniper Junos CLI essentials — Get oriented in Junos operational mode and inspect the chassis.
• Juniper routes and neighbor checks — Inspect routes, ARP entries and discovered neighbors in Junos.
• Ubiquiti UniFi device connectivity — Follow adoption and management connectivity through the UniFi console.
• Ubiquiti UniFi switch port checks — Inspect switch port state, VLAN assignment and PoE budget.