Cisco 5520 and 8540 Wireless Controller Troubleshooting Guide

Cisco 5520 Wireless Controller Rear Panel View

Rear Panel LEDs, Definitions of States

Table 1 lists the Cisco 5520 Wireless Controller Rear Panel LEDs, Definitions of States.

 

Cisco 8540 Wireless Controller Rear Panel View

Before starting

Check if Adobe Flash Player 10 or higher is installed on your local machine.

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Step 1 Type or select the web link for CIMC in your web browser.

Step 2 A security dialog box is displayed, do the following:

a. Optional: Check the check box to accept all content from Cisco.

b. Click Yes to accept the certificate and continue.

Step 3 Enter your Username and password in the log in window.

Step 4 Click Log In.

 

Setting up CIMC for 5520 and 8540 Wireless Controller

To setup the CIMC interface follow the given steps:

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Step 1 Connect the CIMC cable to the 10/100/1000 port in base T.

Step 2 Use the command imm dhcp enable on WLC CLI to enable DHCP to set the IP.

Step 3 If DHCP is not available, use the command imm address <ip address> <net mask> <gateway ip>.

 

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Note Default password will be either ‘password’ or ‘Cisco1234’. You can change this via the username command

CIMC Configurations that are required for reliable WLC operation

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Note Once the user logs in to CIMC the following should not be changed. This will cause issues for WLC operation.

• Do not change the NIC mode to shared. It should be in dedicated mode
• Do not change the FlexFlash Mode
• Do not change the SSD/Virtual disk settings
• BIOS parameters should not be changed

Expectations when logged in via CIMC

• FlexFlash is configured for RAID but only one flash is populated this causes CIMC to show the FlexFlash as degraded.We can safely dis-regard the FlexFlash degradation warning in our case.
• Expect to see only one CPU populated
• Do not configure Software Raid on SSD
  

IMM Chassis Command reference

Some Example Outputs

 

 

Verify that the chasis mac and show inventory mac are conservative and not the same.

 

 

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Note Serial over LAN Configuration: When SOL is enabled, external console does not work

 

 

Debug command to see the Dataplane card temperature

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On Boot up vKVM /Monitor does not display any output

Solution

Display Port / VGA Terminal is not supported.

• Connect the RJ45 console at the rear or use console of break out connector.

Console output not visible / Console port not working

Solution

• Check if the correct console port is connected and not VGA/Video port
• Check if baudrate is 9600
• Check if Serial-over-LAN is disabled in CIMC

• Get the status of this from the Telnet/SSH to controller using

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Note When Serial-Over-LAN is enabled all external consoles will be disabled.

APs not joining with and displays certificate Error / Certificates not found

Solution

• Check if the certificates are installed and not certificate errors were seen during bootup

The above command shows the certificates present/installed and status

• Check if the FlexFlash is present in the SDcard panel in UCS
• Check if the Flexflash is connected to HOST

If we remove the SDcard while WLC is powered on, it will get disconnected and cannot be accessed in subsequent boots as well.

• Enable HyperVisor in Enable/Disable Virtual Device to connect it back to HOST.

APs not joining with and cannot find AP images

Solution

• Check if the AP image bundle is present on the controller.

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Note The above command is seen if the AP images are present.If not found transfer download AES image to re-install the AP bundle.

Serial Console not present at customer can we use SOL

Solution

Yes. But note that external consoles will be disabled.

• Check this box to enabled in CIMC

• Log on to CIMC via SSH
• Once logged in execute the command

• Type Ctrl+X to Exit the serial console.

Continuous prints are seen on cli related to Temp Breach

Solution

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Note Applicable for only 8.1.122.0 and below.Not applicable for 8.1.131.0 onwards and for 8.2

DP WARN - Ambient Temp 46 Breached remote High limit 45

DP WARN - Core temp 96 Breached remote High limit 95

The above prints related to Temp Breach are seen

• Verify the Fan settings and see that the fans are at least 16000 RPM by running

• Check if the vents in the front and back of controller are not obstructed
• Check if the appliance is not in a thermal hot pocket

Controller is starting on connecting the power

Solution

After a power outage my controller switches on by default

• Set the default power restore policy to power on.

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Note This is done so that you need not press the button to physically start the appliance even after all the LEDS are up.This can be changed in CIMC if required

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Service port is not working when CIMC port is connected

Solution

• Check if the NIC is in dedicated mode

You can also figure this by comparing chassis mac and Burned in MAC

Check if the show imm chassis mac and show inventory mac are conservative and not the same. Otherwise it will cause discrepancy.

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Note If this happens check if the NIC is set to be in shared more in CIMC

My management port not coming up

Solution

• Verify if the correct port is connected

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Note Note that the port numbering starts from right to left.

Not able to install/update 5520 controller software

Solution

Check if you have downloaded the 5520 software. 5508 software is not compatible with 5520

https://software.cisco.com/download/release.html?mdfid=286284738&flowid=74382&softwareid=280926587&release=8.1.102.0&relind=AVAILABLE&rellifecycle=ED&reltype=latest

Not able to detect the 1G SFP

Solution

If there is nothing installed in port 1, the board will be configured for 10 G mode by default. Therefore, to switch to 1 G mode, install an SFP module in port 1 and the reboot the system.

Conversely, if an SFP module is installed and the user wants to switch to 4 x 10 G mode, then an SFP+ module must be installed in port 1 and the WLC has to be rebooted.

Thus, Online Insertion and Removal (OIR) of SFP and SFP+ between 10 G and 1 G is not possible.

OIR of 10 G to 10 G and 1 G and 1 G is possible.

Note for 1 G SFP to be detected make sure it is MSA compliant.

It is recommended to have all ports as either 10 G or 1 G. In case they are different, port 1 SFP determines the mode of operation and functionality on the other SFPs may not work.

Port and Link LEDS

Solution

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Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, submitting a service request, and gathering additional information, see What’s New in Cisco Product Documentation at: http://www.cisco.com/c/en/us/td/docs/general/whatsnew/whatsnew.html.

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Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.

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