Troubleshooting Poe Voltage Injection Failure In Ex2300, Ex3400, Or Ex4300 Switch Models With Poe Capability; Troubleshoot Temperature Alarms In Ex Series Switches - Juniper EX4200 Hardware Manual

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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
SEE ALSO
Understanding PoE on EX Series Switches

Troubleshoot Temperature Alarms in EX Series Switches

Problem
Description: EX Series switches generate a temperature alarm FPC 0 EX-PFE1 Temp Too Hot.
Cause
Temperature sensors in the chassis monitor the temperature of the chassis. The switch raises an alarm if
a fan fails or if the temperature of the chassis exceeds permissible levels.
Solution
When the switch raises a temperature alarm such as the FPC 0 EX-PFE1 Temp Too Hot alarm, use the
show chassis environment and the show chassis temperature-thresholds commands to identify the
condition that triggered the alarm.