adding another controller to system

[osman.elhanafy]

Dears,
if i need to add another controller-WLC to existing one in the network to achieve high availability.
is this need a downtime (restarting  the original controller) or not?

thanks

[Scott Fella]

N+1 doesn’t require a downtime. SSO does.

[osman.elhanafy]

thanks for your response.
Should the two controllers have the same software version ?

[Sandeep Choudhary]

Recommandation is to keep the same software version on both WLC else when AP will move from primary to secondary then all AP need to download /install the new software from WLC and it will lead to dwontime of 5-10 minutes.

Regards

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[Sandeep Choudhary]

additing to scott..

here are the guide to implement:

HA AP/Client SSO:

https://networkguy.de/?p=558

HA N+1 :

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

Regards

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