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Chapter 4      Removal and Replacement Procedures
Removing and Installing the Backplane Modules
CautionDo not stack modules on top of each other. This action can cause serious damage to the modules.
NoteGeneric switching module replacement procedures are documented at 
http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/hardware/configuration/notes/gM
dCf_nt.html 
St e p 6Locate the backplane modules that you need to replace. Figure 4-17 shows a front view of the backplane 
with the supervisor engines and switching modules removed.
Figure 4-17 Catalyst 4507R-E Backplane
Mux buffersClock module
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Chapter 4      Removal and Replacement Procedures
Removing and Installing the Backplane Modules
St e p 7If you are removing a clock module, remove the two screws that secure the clock module to the 
backplane. 
St e p 8Locate the seating levers on both sides of the connector for the module that you want to replace. (See 
Figure 4-18.)
Figure 4-18 Finding the Seating Levers
St e p 9
To release the module from its connector, pull the levers outward with your fingernails. The module will 
pop out slightly. (See Figure 4-19.)
Figure 4-19 Releasing the Module
St e p 10
Pull the module out of the connector by grasping the top left and right corners. (See Figure 4-20.) Place 
the old module in an antistatic bag or on an antistatic foam pad.
NoteWhen handling the modules, do not touch the chips or the gold edge contacts on the module.
130658
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Removing and Installing the Backplane Modules
Figure 4-20 Removing the Module 
St e p 11Remove the replacement module from its packaging. Be careful not to touch the chips or the gold edge 
contacts on the module.
St e p 12Carefully position the replacement module in the socket, and gently push the module down to seat it in 
the socket. Make sure that you apply force evenly on both the left and right side of the module. (See 
Figure 4-21.)
Figure 4-21 Seating the Replacement Module
St e p 13
Make sure that the module is fully seated and that it is clipped in by the levers on both sides. (See 
Figure 4-22.)
Figure 4-22 Correct Module Seating
St e p 14
Repeat Step 6 through Step 13 for any other modules that you need to replace.
130660
130661
Good Bad
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Installing the Remote Power Cycling Feature Control Wires (Optional)
St e p 15If you are installing a clock module, secure the module to the backplane using the two screws from the 
earlier removal. 
St e p 16Reinstall the supervisor engines and the switching modules in their previous slots.
St e p 17Reconnect all of the network interface cables to the switching modules.
St e p 18Restore power to the switch.
Verifying the New Modules
After the switch is reassembled and power is restored, connect a terminal to the supervisor engine and 
monitor the boot process. Look for the following messages (or any others), which may indicate a 
problem with the replaced modules:
00:00:20: %C4K_SUPERVISOR-2-MUXBUFFERNOTPRESENT: Mux buffer (WS-X4K-MUX) 3 is not present
00:00:20: %C4K_SUPERVISOR-2-MUXBUFFERNOTPRESENT: Mux buffer (WS-X4K-MUX) 4 is not present
00:00:20: %C4K_SUPERVISOR-2-MUXBUFFERNOTPRESENT: Mux buffer (WS-X4K-MUX) 7 is not present
The above messages (either at startup or output from a show logging command) indicate that the 
mux-buffer is not present in slots 3, 4 and 7. You need to reinsert and reseat the modules in those slots.
If the switch has already started up, you may also verify the correct function of the new modules with 
the show logging command.
Installing the Remote Power Cycling Feature Control Wires 
(Optional) 
The remote power cycling feature allows you to power down and power up a switch chassis through the 
network rather than being physically present to turn the power supply power switch off and on. The 
remote power cycling feature is only available on the 6000 W and the 9000 W AC-input power supplies. 
Several vendors make remote power cycling relay controller boxes that can be used to power cycle the 
Catalyst 4500 E-series switch chassis. Most of these relay controller boxes have the capability of 
controlling multiple power supplies. The relay controller boxes have a network interface that allows the 
user to remotely access the relay controller box and toggle a built-in relay. The built-in relay can be 
either a normally open (NO) type or an RS-232 type of relay. We strongly recommend that you purchase 
a relay controller box that uses a NO relay. The relay controller box is installed near the switch chassis 
and is attached to the network. Two control wires extend from the relay controller box to a four-position 
terminal block located on the front panel of the 6000 W and 9000 W power supplies. A signal from the 
relay controller box travels through the control wires to toggle the power supply on or off. 
This section only describes how to install the remote power cycling feature control wires; relay 
controller box installation instructions should be provided by the maker of the relay controller box. 
						

							  
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Installing the Remote Power Cycling Feature Control Wires (Optional)
Required Tools and Components
The following tools and components are required to perform this procedure:
•Relay controller box. 
We strongly recommend that you purchase a relay controller box that uses a NO (normally open) 
relay to control the remote power cycling.
•Small flat-blade screwdriver
•18 AWG (maximum) control wire
•Wire cutter
•Wire stripper
Installing the Remote Power-Cycling Control Wires
To install the two control wires from the relay controller box to the 6000 W or the 9000 W power supply, 
follow these steps:
St e p 1Remove the relay controller box from its shipping packaging.
St e p 2Install the relay controller box following the installation documentation supplied with the product.
St e p 3Measure and cut two pieces of 18 AWG control wire long enough to run between the relay controller box 
terminals and the terminal block on the power supply.
St e p 4Strip approximately 1/4-inch of insulation from each end of both control wires.
St e p 5Connect the two control wires to the relay controller box terminals following the instruction 
documentation supplied with the relay controller box.
St e p 6Identify which pair of terminals on the power supply terminal block (either terminals +V and IN for a 
NO relay (recommended) or terminals IN and GND for an RS-232 relay) where you need to connect the 
control wires. Using a small flat-blade screwdriver, depress the wire release mechanism for one of the 
terminals on the power supply terminal block and insert the bare wire into the terminal. (See 
Figure 4-23.) Remove the screwdriver to secure the wire. Gently tug on the wire to verify that it is secure 
in the terminal block.
St e p 7Repeat Step 6 for the second control wire. 
						

							  
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Installing the Remote Power Cycling Feature Control Wires (Optional)
Figure 4-23 Installing the Relay Control Wires (6000 W Power Supply Shown)
You are now ready to install the ferrite bead on the control wires. Follow the installation instructions 
supplied in the package containing the ferrite bead or the installation procedure in the next section.
Installing the Ferrite Bead
The ferrite bead is a passive device that limits high-frequency interference on interface and control 
cables, and it is only required when you install the remote power-cycling feature. The ferrite bead is 
installed on the two control wires that link the external relay controller box with the remote 
power-cycling terminal block on the 6000 W or the 9000 W power supply. 
To install the ferrite bead on the remote power-cycling control wires, follow these steps:
St e p 1Remove the ferrite bead and the two plastic ties from the plastic bag.
St e p 2Open the ferrite bead as shown in Figure 4-24, View A.
St e p 3Place the two remote power-cycling control wires (18 AWG maximum) in the ferrite bead as shown in 
Figure 4-24, View B. Close the ferrite bead making sure that the two halves have completely snapped 
together and are secure.
St e p 4Locate a point on the remote power-cycling control wires that leaves approximately 1 to 2 inches (2.5 to 
5 cm) of exposed wire from the remote power cycling terminal block located on the front of the power 
supply. Wrap one of the 4-inch plastic ties around the remote power-cycling control wires at that point. 
Tighten the plastic tie so that it is snug against the control wires and cannot slide. See Figure 4-24, 
Vi ew C .
St e p 5Slide the ferrite bead so that it is positioned just behind the first plastic tie wrap. Take the second plastic 
tie and wrap it around the control wires directly behind the ferrite bead and tighten it so that the ferrite 
bead cannot slide up or down the control wires. See Figure 4-24, View C.
St e p 6To finish the procedure, trim the excess plastic strap from the two plastic tie wraps.
274932
Remote
power on/off
terminal block
Ferrite
bead Relay controller
6000 Watt power supply
Network Relay
controller
power 
						

							  
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Chapter 4      Removal and Replacement Procedures
Installing the Remote Power Cycling Feature Control Wires (Optional)
Figure 4-24 Installing the Ferrite Bead
181876
Ferrite bead open
Approximately
1 to 2 inches (2.5 to 5 cm)
To power supply remote
power on/off terminal block
Tie wrap Tie wrap
Ferrite bead
View A
View CView B 
						

							  
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Installing the Remote Power Cycling Feature Control Wires (Optional) 
						

							CHAPTER
  
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5
Troubleshooting 
This chapter describes how to perform basic troubleshooting on the Catalyst 4500 E-series switch. 
Problems with the initial startup are often caused by a switching module that has become dislodged from 
the backplane or a power cord that is disconnected from the power supply.
Although temperature conditions above the maximum acceptable level rarely occur at initial startup, 
some environmental monitoring functions are included in this chapter because they also monitor power 
supply output voltages. 
NoteInformation about troubleshooting software features and configuration problems is not discussed in this 
chapter.
More up to date information can be found in the release notes or Error Message Decoder tool. 
Information specific to your software release can be found in the software configuration guide for that 
release, or in the system message guide for your release. The following links may be useful in 
combination with this chapter:
•Release notes
http://www.cisco.com/en/US/products/hw/switches/ps4324/prod_release_notes_list.html 
•Error Message Decoder
http://www.cisco.com/cgi-bin/Support/Errordecoder/index.cgi 
•Software configuration guide
http://www.cisco.com/en/US/products/hw/switches/ps4324/products_installation_and_configurati
on_guides_list.html 
•System message guide
http://www.cisco.com/en/US/products/hw/switches/ps4324/products_system_message_guides_list
.html 
This chapter presented in the following sections:
•System Boot Verification, page 5-2
•Using LEDs to Identify Startup Problems, page 5-3
•System Messages, page 5-4 
•Troubleshooting with Software, page 5-4
•Troubleshooting the Power Supply, page 5-4 
						

							  
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Chapter 5      Troubleshooting
System Boot Verification
•Troubleshooting the Fan Assembly, page 5-6
•Troubleshooting Backplane Modules, page 5-7 
•Troubleshooting Switching Modules, page 5-8 
•Troubleshooting Supervisor Engines, page 5-10
•Some Problems and Solutions, page 5-16
NoteThis chapter covers only the chassis component hardware aspects of troubleshooting. For software 
configuration issues, refer to the software configuration guide
http://www.cisco.com/en/US/products/hw/switches/ps4324/products_installation_and_configuration_g
uides_list.html
or command reference
http://www.cisco.com/en/US/products/hw/switches/ps4324/prod_command_reference_list.html
for your software release. 
System Boot Verification
When the initial system boot is complete, verify the following:
•That the system software boots successfully
Hook up a terminal and view the startup banner. Use an RJ-45-to-RJ-45 rollover cable to connect 
the console port to a PC with terminal emulation software set for 9600 baud, 8 data bits, no parity, 
and 1 stop bit. Watch for any system messages after startup.
•That the power supplies are supplying power to the system
The power supply’s LEDs should be green. Use the show environment Cisco IOS command to view 
power supply activity.
•That the system fan assembly is operating
Listen for fan activity. The Fan tray LED should be green during operation. Use the show 
environment Cisco IOS command to view fan tray activity.
•That the supervisor engine and all switching modules are installed properly in their slots, and that 
each initialized without problems
If all of these conditions are met and the hardware installation is complete, refer to the software 
configuration guide and command reference publications for your switch so that you can troubleshoot 
the software. 
If any of these conditions is not met, use the procedures in this chapter to isolate and, if possible, resolve 
the problem.