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Frequent Contributor I

IAP can support how many unit in a single cluster

Now IAP in a single cluster can support how many unit?

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MVP Guru

Re: IAP can support how many unit in a single cluster

Please the Aruba Instant VRD for an answer to this question:

 

Cluster Design
By default, all Aruba IAPs on a Layer 2 domain form a cluster. No hard limit exists on the number of APs or clients that you can support on a single cluster. However, the maximum tested IAP cluster size is 128 IAPs in a cluster.
Guidelines for cluster and mobility design include the following guidelines:

  • Aruba recommends that you use the validated cluster size of 128 APs and 2048 clients per cluster for your cluster design.
  • To allow for some future growth, design a cluster at 80 to 90 % (about 110 APs) of the validated capacity.

Although the validated cluster size limit applies to a cluster, you can expand a deployment to more than 128 APs by deploying multiple clusters that have Layer 3 mobility enabled between them.

  • If a deployment within a contiguous RF domain requires more than 110 APs, divide the deployment into multiple clusters and enable Layer 3 mobility between them.
  • Layer 3 roaming has little to no impact on performance if you enable the Home Agent Load Balancing feature that is part of the Aruba Instant architecture. If you enable this feature, the VC assigns the home AP for roamed clients by using a round robin policy. With this policy, the load for the APs acting as home agents for roamed clients is uniformly distributed across all the IAPs in the cluster.

NOTE: Aruba recommends that you enable the Home Agent Load Balancing feature in deployments in which you expect a high volume of Layer 3 roaming between clusters.

 

If you need advice, please consult your Aruba Partner or Aruba Sales team. My personal experience is that the better control you have on the wired access switches (and follow the best-practices from the VRD, especially on broadcast control and separation of client traffic) the more APs you can put in one cluster with still proper performance. Starting from about 20-30 APs in a cluster, really make sure you follow the recommendations.

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If you have urgent issues, please contact your Aruba partner or Aruba TAC (click for contact details).

Re: IAP can support how many unit in a single cluster

Hi Herman,

 

I have implemented several cluster of Instant, but they were small and with no special requirements.

 

1. Do you have experience with clusters of around 100 IAPs? This size of cluster has a good performance or is better two clusters of 50 IAPs?

 

2. If you have two cluster of Instant and you enable the Home Agent Load Balancing, is the roaming between clusters seamless with no disruption?

 

Regards,

Julián

Re: IAP can support how many unit in a single cluster

Hi guys,

 

Anyone with experience with big clusters of IAPs?

 

Regards,

Julián

New Contributor

Re: IAP can support how many unit in a single cluster

Yes sir, Which IAP Model you use to test.

New Contributor

Re: IAP can support how many unit in a single cluster

Hello,

we will be deploy 120 AP-304 on warehouse. How many clusters do i need to deploy in instant mode or should I use a hardware controller?

Guru Elite

Re: IAP can support how many unit in a single cluster

100 access points is considered the limit for a cluster.  You should consider a controller if you would exceed that.

 


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
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New Contributor

Re: IAP can support how many unit in a single cluster

Thanck you for your answer but i do not understand why external controller is better than two or more instant clusters with L3 rouming?

New Contributor

Re: IAP can support how many unit in a single cluster

Thanck you for your answer but i do not understand why external controller is better than two or more instant clusters with L3 roming?

Guru Elite

Re: IAP can support how many unit in a single cluster

I said, "you should consider".  I didn't say that you must.

 

A warehouse deployment is hard enough, if you use a controller, you can at least troubleshoot in a single interface.  If you have two clusters, you will have to troubleshoot devices over two interfaces.


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
ArubaOS 8.4 User Guide
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Airheads Knowledgebase
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