WLC redundancy

Answered Question
Mar 3rd, 2010
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I have a question about the wlc with the following scenario:


1- I have two 50 APs WLAN Controllers (WLC1, WLC2).

2- I have 20 APs in total.

3- The APs are configured with primary and secondary WLC.

4- Ten of the 20 APs are associated to WLC1 as primary.

5- The other ten APs are associated to WLC2 as secondary.


I need to know what would happen with the APs associated to the WLC1 if the WLC1 fails?.

How fast will be the reassociation to the WLC2.

Are the tcp/udp/etc conections broken?.


Its a possible solution for redundancy?.

Correct Answer by George Stefanick about 7 years 4 months ago

Good question. The AP will drop for 5 seconds, flash colors and go right to green (when  no one is associated or deep blue if someone associates right away).


You can test this ... take a test ap, put it on WLC1 then change the primary to WLC2 and enable AP Fall back ... You will see the AP move over to the other controller in a minute or so ...


In any case, you break the LWAPP tunnel and the AP rejoins a new controller and establishes a new tunnel.

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Leo Laohoo Wed, 03/03/2010 - 13:12
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DO you have HREAP enabled?
What firmware are you running?

Correct Answer
George Stefanick Wed, 03/03/2010 - 17:57
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Good question. The AP will drop for 5 seconds, flash colors and go right to green (when  no one is associated or deep blue if someone associates right away).


You can test this ... take a test ap, put it on WLC1 then change the primary to WLC2 and enable AP Fall back ... You will see the AP move over to the other controller in a minute or so ...


In any case, you break the LWAPP tunnel and the AP rejoins a new controller and establishes a new tunnel.

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