Chassis Cooling - Cisco Catalyst 4900M Installation Manual
Catalyst 4900m switch
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Also See for Catalyst 4900M:
- Installation manual (128 pages) ,
- Troubleshooting manual (6 pages) ,
- Configuration handbook (359 pages)
Table of Contents
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Chapter 1
Product Overview
Chassis Cooling
Note
Caution
78-18350-01
Table 1-1
LED Descriptions (continued)
LED
Color or State
Port
Green
Yellow
(front)
Flashing yellow
Off
Fan (front
Off
and rear)
Green
Red
PS1 and
Off
PS2
Green
Red
(front)
1. If either LED is green and the other is OFF the power supply is probably not plugged in. If it is
red, the supply is either plugged in and not switched on or it is faulty. It may be necessary to
interrogate the system for further status using the CLI.
For environmental specifications, see
The hot-swappable system fan tray provides cooling air for the internal chassis
components. The fans exhaust air to the left, and fresh air is drawn in from the
right side of the chassis.
When the fan tray is removed, internal circuitry is exposed that should not be
touched by tools or fingers. The system should not be left operating without a fan
tray for longer than is necessary to replace a faulty fan tray with a new one.
Figure 1-7
shows the direction of airflow going in and out of the switch.
Description
Port is operational
Port is disabled by user
Power-on self-test indicates faulty port
No signal detected or link configuration
failure
No power to the switch or fans (the tray may
not be plugged in especially if one or more of
the power supplies status LED is green)
Fan tray operational
Fault detected
No power to the PS
1
Operational
Fault detected or the on/off switch is set to
off while the power supply is plugged in
Chapter 2, "Site Planning."
Cisco Catalyst 4900M Switch Installation Guide
Switch Components
1-11
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Table of Contents
Troubleshooting
