5520 in N+1 Configuration

[b.tyler]

We have a pair of 5520's in DC1 in HA SSO and licensed for 500 APs.   We want to establish fail over to DC-2 for the 500 AP's.  Can we purchase a 2nd 5520 with no licenses for an N+1 fail over or do we need 500 licenses on the N+1 5520 controller?  Taking it one step further, can we purchase a pair of 5520's for DC-2 and configure then for HA SSO and no licensing? Basically N+1 to a HA SSO pair that is unlicensed. 

[Rasika Nayanajith]

Since 3504/5520/8540 supports RTU licensing, so you should be able to do that technically. This page clarifies most of licensing queries on those models.

https://www.cisco.com/c/en/us/support/docs/wireless/3504-wireless-controller/214106-licensing-on-3504-5520-and-8540-wireles.html 

HTH

Rasika

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[Sandeep Choudhary]

Hi,

There are two diff cases:

1. If you want to use HA AP/Client SSO then you dont need license on both WLCs. (In this you need direct connctivity between WLCs or you can extend using layer 2 VLAN)

2. If you want to Implement HA N+1 then you need 500 licenses on each WLC.

how toi implement HA N+1:

https://rscciew.wordpress.com/2014/06/07/n1-high-availability-configuration-on-cisco-2504wlc/

How to implemnet HA AP/Client SSO:

https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/7-5/High_Availability_DG.html

Regards

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