topic RE: Wireless controller cluster in Network Architecture & Design

Wireless controller cluster

Andre_Brits_Kan — Fri, 15 Nov 2013 21:49:00 GMT

What is the maximum number of wireless controllers that can be clustered together?
Also what is the maximum number of Wireless controllers that can be managed by Netsight?

RE: Wireless controller cluster

Andre_Brits_Kan — Fri, 15 Nov 2013 21:50:00 GMT

I am looking at 100 C5210 controllers in a data center to support the required amount of AP's

RE: Wireless controller cluster

hsachse — Fri, 15 Nov 2013 22:42:00 GMT

Hello Andre,

how many AP's do you plan to use? 100 C5210 controllers would support a maximum number of 100.000 APs - thats a really great number.

You can pair two controllers to one avaiblity pair (primary, secondary contr.) to support 2000 APs in failover mode. I think you need 50 different controller pairs in such a large setup. In the AP configuration you can add up to 3 controller ip addresses (controller search list). I'm not sure whats maximum number that can be managed by Netsight.

RE: Wireless controller cluster

Doug — Mon, 18 Nov 2013 23:42:00 GMT

We support up to 12 controllers in a mobility domain. You will want to make sure you are careful when setting up large mobility domains. If a user starts out in subnet x and roams to a controller with the same SSID that is in subnet y, all the broadcast traffic for x and y now have to be sent by the ap's radio. So if the broadcast domains are large to start, you could be doubling the broadcasts a radio has to send.

I know that 12 controllers with 5000 ap's was the last number I had seen tested against NetSight. If you require more testing, I would suggest you work with your Extreme Sales Rep to help get a deployment of that size confirmed by our Product Management Team.

Doug Hyde
Sr Support Engineer
Extreme Networks

RE: Wireless controller cluster

hsachse — Mon, 18 Nov 2013 23:42:00 GMT

And what is the limit for the avaibility with fast failover setup?

RE: Wireless controller cluster

Doug — Mon, 18 Nov 2013 23:42:00 GMT

If it's access points it's the max total the unit you are using supports. Access points that configured locally support x with the ability to keep y running in failover (total number of access points per product)

https://d2r1vs3d9006ap.cloudfront.net/s3_images/986940/RackMultipart20131118-15422-cqcvp5-Controller...

-Doug

RE: Wireless controller cluster

hsachse — Mon, 18 Nov 2013 23:42:00 GMT

Ok, know this limits. So for example in a setup with 12 controllers you would need 6 availbility pairs to support fast failover for all wireless connections.