WLAN Controller Redundancy

Answered Question
Mar 23rd, 2010

What is the method to provide Redundancy to the WLAN controller

function?

Can the Unified AP use a backup WLAN controller? In this case, is configuration of the two controllers automatically synchronized?

I have this problem too.
0 votes
Correct Answer by rob.huffman about 6 years 8 months ago

Hi Andres,

You are most welcome my friend

To manage the WLC's you may want to look into the WCS

(Wireless Control System). It can be used to push config templates

to the AP's and WLC's as well as many management functions.

The WCS is a nice addition for the management especially when running multiple WLC's but is not required.

Info on the WCS;

http://www.cisco.com/en/US/products/ps6305/index.html

Hope this helps!

Rob

Correct Answer by rob.huffman about 6 years 8 months ago

Hi Andres,

In the WLC world this is how an AP is covered in case one WLC fails. It is not without some "downtime" in case of failure but both Controllers are active. You have to keep in mind that an AP can only be registered to one WLC at a time so this is the best that you can do When one WLC fails the AP then has to re-register with the backup, this is not a completly seemless process.


This has some really good info;

WLAN Controller Failover for Lightweight Access Points Configuration Example

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

For newer WLC Release versions  (there is also)

Wireless LAN Controller and Light Weight Access Points Failover Outside the Mobility Group Configuration Example

http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a00809817ca.shtml

Cheers!

Rob

Please support CSC Helps Haiti

https://supportforums.cisco.com/docs/DOC-8895

https://supportforums.cisco.com/docs/DOC-8727

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Correct Answer
rob.huffman Tue, 03/23/2010 - 10:47

Hi Andres,

In the WLC world this is how an AP is covered in case one WLC fails. It is not without some "downtime" in case of failure but both Controllers are active. You have to keep in mind that an AP can only be registered to one WLC at a time so this is the best that you can do When one WLC fails the AP then has to re-register with the backup, this is not a completly seemless process.


This has some really good info;

WLAN Controller Failover for Lightweight Access Points Configuration Example

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

For newer WLC Release versions  (there is also)

Wireless LAN Controller and Light Weight Access Points Failover Outside the Mobility Group Configuration Example

http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a00809817ca.shtml

Cheers!

Rob

Please support CSC Helps Haiti

https://supportforums.cisco.com/docs/DOC-8895

https://supportforums.cisco.com/docs/DOC-8727

MCentrick2010 Tue, 03/23/2010 - 11:03

Fantastic thanks.

But, is it possible to synchronize the configuration of both Access Controllers?

Correct Answer
rob.huffman Tue, 03/23/2010 - 12:59

Hi Andres,

You are most welcome my friend

To manage the WLC's you may want to look into the WCS

(Wireless Control System). It can be used to push config templates

to the AP's and WLC's as well as many management functions.

The WCS is a nice addition for the management especially when running multiple WLC's but is not required.

Info on the WCS;

http://www.cisco.com/en/US/products/ps6305/index.html

Hope this helps!

Rob

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