Distributed 5508 WLC

Answered Question
Aug 13th, 2012

Hi All,

I'm currently investigating the possibility of installing 5508 WLCs in 2 of our data centres. The data centres will be connected by layer 3 MPLS (50ms rtt apart) . Remote offices will have an IP connection to each data centre via a mixture of MPLS and IPSec VPNs.

The plan is to configure the 5508 in DC1 as active and the 5508 in DC 2 as standby with the APs in the offices registering to DC1 WLC as the primary and DC2 WLC as a backup.

Will this work without any problems? Will the WLCs need to communicate, and if so, will this work over the layer 3 data centre interconnect?

Thanks                 

I have this problem too.
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Correct Answer by Leo Laohoo about 1 year 8 months ago

The plan is to configure the 5508 in DC1 as active and the 5508 in DC 2 as standby with the APs in the offices registering to DC1 WLC as the primary and DC2 WLC as a backup.

Will this work without any problems? Will the WLCs need to communicate, and if so, will this work over the layer 3 data centre interconnect?

This will work as long as the WAP can "ping" the management interface of both WLC.  The best way to test is to configure the WAP to go to each WLC.

Alot of people have this kind of scenario.

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Correct Answer
Leo Laohoo Mon, 08/13/2012 - 22:33

The plan is to configure the 5508 in DC1 as active and the 5508 in DC 2 as standby with the APs in the offices registering to DC1 WLC as the primary and DC2 WLC as a backup.

Will this work without any problems? Will the WLCs need to communicate, and if so, will this work over the layer 3 data centre interconnect?

This will work as long as the WAP can "ping" the management interface of both WLC.  The best way to test is to configure the WAP to go to each WLC.

Alot of people have this kind of scenario.

wscotty2012 Tue, 08/14/2012 - 15:00

Thats great, thanks for this.

One other question. We will have roughly 40 access points in one of the buildings that will need to support roaming voice. I was considering using flexconnect mode for the access points and breaking the voice traffic out locally,  but I then realised that as I can only have 25 APs in a flexconnect group, I will need to create multiple groups which can then cause complications with roaming between flexconnect groups, correct? If so, is it best to tunnel all traffic back to the WLC?

Thanks,

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Posted August 13, 2012 at 3:16 PM
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