Wireless Access

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New Contributor

Large Campus Architecture

Hello folks,

 

I'm trying to determine the optimal design (high level) for a large campus wireless solution. I've read through the ArubaOS 8 Fundamentals guide and it is packed with info; but I'm left curious if anyone has any hands on experience or strong preferences for the Centralized vs Distributed Cluster architecture.

 

The campus is very large and will have two data centers with several thousand APs. As mentioned in the Guide, primary applications are only in the DCs so it seems Centralized would be the logical choice.

 

Thank you for any guidance, experience, or even just opinions!

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Guru Elite

Re: Large Campus Architecture

Opinion:

 

Centralized as much as possible. 

- As long as you can provide enough bandwidth to controllers from access points in that scenario (1 gigabit connection for every 100 access points to each controller), that is the preferred scenario. 

- Configure as much as possible in common at the folder level.  Controllers would have minimal configuration in specific and you would add or remove controllers to a cluster to add and remove capacity and leverage redundancy without tons of configuration.

- If you have two datacenters that data is actually being served out of, you would have the option of having two separate clusters, if it would make you more comfortable. 

- A cluster boundary would be anywhere that all layer 2 VLANs can be shared with a group of controllers.  If you cannot do that between your controllers, you should create a separate cluster, where you can do this.

 

Again, this is my opinion from working with organizations to both (1) Migrate from 6.x to 8.x and (2) Deploy enterprises from scratch on 8.x.

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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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Regular Contributor I

Re: Large Campus Architecture

Hi Jordan,

 

Without all the details, only a generic advise can be given.

 

Questions : 

 

1. Where is the internet breakout?

2. Are there secondary application that are not DC-only that require bandwidth (use of streaming devices (AppleTV's), AirPrint, etc) 

3. Are you designing the wired network with a seperate campus and DC core?

 

With Centralized design you have the advantage of less complexity in your wired campus network as the wireless traffic is tunneled all the way to the DC's.

 

A global schematic of the wired layout could help to follow trafficflows and determine bottlenecks and strongpoints.

 

Hope it helps

 

 

Cheers, Frank
Aruba Partner Ambassador| AMFX#22| ACCX#613| ACMX#733| ACDX#744

If you like my posts, kudo's are welcome. If it solves your problem, please click 'Accept as Solution'
New Contributor

Re: Large Campus Architecture

Thanks for the replies.

 

In regard to the questions:

 

1. Everything will go through the data centers for local applications and for external to outside.

2. Not to speak, the biggest portion of the traffic will be guests accessing external networks.

3. Not sure I follow, but yes we are designing (again from a high level only) the wired core for the site as well. Its a typical three tier access > distribution > core.

 

Regular Contributor I

Re: Large Campus Architecture

Hi Jordan,

 

Then centralized (like Colin already advised) should be your best option.

 

Look into Colins post, that will help.

 

 And please make sure you have the right amout of bandwidth in the three tier design. Wireless is depending on it!

Cheers, Frank
Aruba Partner Ambassador| AMFX#22| ACCX#613| ACMX#733| ACDX#744

If you like my posts, kudo's are welcome. If it solves your problem, please click 'Accept as Solution'
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