General Questions About WLC 4400 Cluster

Answered Question
Nov 28th, 2007
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I've inherited a couple 4402 Wireless LAN Controllers and am in charge of getting them ship-shape. While I have some general knowledge of wireless, I have not worked with wireless controllers before and have a couple questions I was wondering if anyone could help me with:


1) How can I verify that the primary and secondary controllers are configured for failover without actually performing a test? Both do have AP Failback enabled, but I'm not sure what else to check.


2) They are currently running code 3.2.116.21. Should I stick with 3.2 or plan to move up to 4.X?


Thanks a bunch. I'm slowly working my way through the docs and answers to these would sure speed things up.

Correct Answer by Rob Huffman about 9 years 5 months ago

Hi Johnny,


Hope things are well with you! The steps required to configure AP Fallback are detailed quite nicely in the attached doc. I would always try to schedule a Maintenance window to test this out rather than not knowing for sure :)


WLAN Controller Failover for Lightweight Access Points Configuration Example


http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a008064a294.shtml#c4


Now, for your second question, it's likely that you will want to upgrade the WLC to a newer version of code. They have gone through 4.0.x,4.1.x and the newest is 4.2.x. So 3.2 is a fair ways behind. Have a look at the WLC Release Notes;


Cisco 4400 Series Wireless LAN Controllers Release Notes


http://www.cisco.com/en/US/products/ps6366/prod_release_notes_list.html


Hope this helps!

Rob

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Correct Answer
Rob Huffman Sun, 12/02/2007 - 09:02
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Hi Johnny,


Hope things are well with you! The steps required to configure AP Fallback are detailed quite nicely in the attached doc. I would always try to schedule a Maintenance window to test this out rather than not knowing for sure :)


WLAN Controller Failover for Lightweight Access Points Configuration Example


http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a008064a294.shtml#c4


Now, for your second question, it's likely that you will want to upgrade the WLC to a newer version of code. They have gone through 4.0.x,4.1.x and the newest is 4.2.x. So 3.2 is a fair ways behind. Have a look at the WLC Release Notes;


Cisco 4400 Series Wireless LAN Controllers Release Notes


http://www.cisco.com/en/US/products/ps6366/prod_release_notes_list.html


Hope this helps!

Rob

johnnylingo Sun, 12/02/2007 - 11:04
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Hi Rob,


Thanks for the input. TAC pointed me to the same doc, and after taking all those steps it finally worked after I erased the config on each AP. Sounds like this might be a bug on the 3.2 Controller code (I haven't looked through all the bugs, but do see there plenty of justify moving up to 4.X)

Rob Huffman Mon, 12/03/2007 - 06:18
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Hi Johnny,


You are most welcome! Glad to help in some very small way :)


Take care,

Rob

johnnylingo Thu, 12/06/2007 - 15:10
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Great tip. I had tried to jump up to 4.1 and it gave me an error about the flash memory. This would explain why it failed.

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