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Switches and Routers

Router problems, network ports not working, cameras or phones with no power

Cisco Switch ProblemsPoE FailuresRouter ConnectivityRouting ProblemsSwitch Port TroubleshootingVLAN Configuration Issues
Switch and Router Troubleshooting: Ports, VLANs, Routing and PoESection guidePorts that won’t work, VLAN mix-ups, routing gaps and PoE power problems: what to check on switches and routers, with Cisco commands.

Before you change anything

Save the current device configuration and note what you change, so you can roll back.