WLAN Controller Redundancy

Answered Question
Mar 23rd, 2010
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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?

Correct Answer by Rob Huffman about 7 years 3 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 7 years 3 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
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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
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Fantastic thanks.


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

Correct Answer
Rob Huffman Tue, 03/23/2010 - 12:59
User Badges:
  • Super Blue, 32500 points or more
  • Hall of Fame,

    Founding Member

  • Cisco Designated VIP,

    2017 IP Telephony, Unified Communications

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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