Troubleshooting Poe Voltage Injection Failure In Ex2300, Ex3400, Or Ex4300 Switch Models With Poe Capability; Troubleshooting Temperature Alarms In Ex Series Switches - Juniper EX2200 Hardware Manual

Troubleshooting PoE Voltage Injection Failure in EX2300, EX3400, or EX4300 Switch Models
with PoE Capability
Problem
Solution
See Also

Troubleshooting Temperature Alarms in EX Series Switches

Problem
Cause
Solution
Copyright © 2018, Juniper Networks, Inc.
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.
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
Understanding PoE on EX Series Switches
Description: EX Series switches generate a temperature alarm
Hot .
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.
When the switch raises a temperature alarm such as the
alarm, use the
show chassis environment
commands to identify the condition that triggered the alarm.
CAUTION: To prevent the switch from overheating, do not operate it in an
area that exceeds the maximum recommended ambient temperature. To
prevent airflow restriction, allow at least 6 inches (15.2 cm) of clearance
around the ventilation openings.
Connect to the switch by using Telnet and issue the
1.
command. This command displays environmental information about the switch
chassis, including the temperature, and information about the fans, power supplies,
Chapter 5: Troubleshooting Hardware
FPC 0 EX-PFE1 Temp Too
FPC 0 EX-PFE1 Temp Too Hot
and the
show chassis temperature-thresholds
show chassis environment
163