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Wireless controller cluster


Userlevel 5
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?

6 replies

Userlevel 5
I am looking at 100 C5210 controllers in a data center to support the required amount of AP's
Userlevel 4
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.
Userlevel 7
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
Userlevel 4
Doug wrote:

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

And what is the limit for the avaibility with fast failover setup?
Userlevel 7
Doug wrote:

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

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)[i]

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

-Doug
Userlevel 4
Doug wrote:

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

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.

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