Redundancy for WLC2504

a-weitzel · ‎09-23-2013

Hello,

I want to build the WLC2504 redundant (fail-safe). A short downtime during the switch over is not a problem. There are 20 AP to the WLC.

What do I have to order? Another WLC2504 with 25 licenses or you can also AIR-CT2504-HA-K9 (Cisco 2500 Series Wireless Controller for High Availability) used and I need to buy licenses for these too?

Can someone answer me this, unfortunately I do not understand what is the correct and economical choice.

Thanks and regards

Alexander

Scott Fella · ‎09-23-2013

For redundancy you have 2 choices. Get another WLC with license or the HA WLC. Both will work, but the HA WLC is cheaper because it's just used for N+1. With a licensed WLC, you can have half on one WLC and half on the other. So it depends how you want your redundancy. I like having licenses because of the fact that I can split the load between the two. This also allows me to know that the other WLC is function properly. Now if budget is a priority, then go with the HA WLC and setup that as N+1.

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-Scott
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vlad.mihailov · ‎09-23-2013

Scott,

How does HA gets turned on on the 2504 controller? I never could find this feature.. Running 7.4.100 at the moment.

Thank you.

Scott Fella · ‎09-23-2013

N+1 is supported on the 2504, AP SSO is not.

http://www.cisco.com/en/US/docs/wireless/technology/hi_avail/N1_High_Availability_Deployment_Guide.pdf

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-Scott
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vlad.mihailov · ‎09-24-2013

Thank you. Great option I have not yet used.

S. Hasan · ‎05-21-2015

Hi Scott:

I have a query here, I have one AIR-CT2504-25-K9 and AIR-CT2504-HA-K9 with L-LIC-CT2504-5A.

Can I use this as Active-Active to achieve load balancing and failsafe environment using 2504-HA hardware ?

I have 20 AP's to be managed ....

Abhishek Abhishek · ‎09-24-2013

Yes, you can either go for buying HA license or another WLC with licences. The choice can be based on your budget.