Troubleshooting PoE Voltage Injection Failure in EX2300, ​EX3400, or EX4300 Switch Models with PoE Capability

 

Problem

Description: Devices that draw power from EX2300, EX3400, or EX4300 switch models with Power over Ethernet (PoE) capability do not get power from those switches. The problem persists after rebooting the switches or upgrading to the latest version of Junos OS.

Environment: EX2300, EX3400, or EX4300 switch models with PoE capability are connected to EX2200, EX3200, or EX4200 switch models with PoE capability by using RJ-45 network ports.

Solution

When you connect EX2300, EX3400, or EX4300 switch models with PoE capability to EX2200, EX3200, or EX4200 switch models with PoE capability by using RJ-45 network ports, disable PoE on all the RJ-45 network ports used to connect the switches using the command:



user@device> set poe interface interface-name disable