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Contributor I
Posts: 24
Registered: ‎01-03-2012

Best way to setup two controllers in seperate data centers

We have 2 of the 650 controllers and will be placing one in each of our data centers. We will have rap's setup in our sales office. There is an mpls network between all sites so they can all talk internally. I want to have one of the controllers setup as primary and the other setup as backup, so that if the primary fails the rap's will failover to the other controller. Anyone have this setup and what is the best way for me to accomplish this?

Note that I have one of the controllers setup as master role in one data center at this time and am about ready to go install the rap's in the sale office.

Moderator
Posts: 53
Registered: ‎04-09-2007

Re: Best way to setup two controllers in seperate data centers

Along5664, 

 

This is a very common setup, two concepts that need to be implemented:

 

- The "master" variable that you configure on the RAPs should be a hostname that resolves to both controllers

- In the RAP's AP-Group make sure you set the lms-ip and bkup-lms-ip in the AP System Profile

 

These concepts and the overall design are discussed in the VBN VRD found here:

 

http://www.arubanetworks.com/pdf/technology/VBN_VRD.pdf

Contributor I
Posts: 24
Registered: ‎01-03-2012

Re: Best way to setup two controllers in seperate data centers

Thanks for the reply. Is there a way to sync the configs between the controllers? Or do I have to setup each one seperate?

Aruba Employee
Posts: 45
Registered: ‎06-16-2009

Re: Best way to setup two controllers in seperate data centers

In a mastre local configuration all changes will be made to the master and they will automagically be synced over to the local.


Harold
Occasional Contributor II
Posts: 12
Registered: ‎01-27-2011

Re: Best way to setup two controllers in seperate data centers

Harold,

 

Does this apply to RAP whitelist as well?

 

Thanks,

Nick

Moderator
Posts: 53
Registered: ‎04-09-2007

Re: Best way to setup two controllers in seperate data centers

Nick, 

 

The whitelist is NOT sync'ed between a master and a local.  You can export it and import it into the local and tell the local to use the database, but further updates would have to be done in both locations manually or through Airwave.  An alternative is to implement a backup master at this point.  

 

Regards, 


Austin

Aruba Employee
Posts: 509
Registered: ‎07-03-2008

Re: Best way to setup two controllers in seperate data centers

I have this setup exactly and I use a master and master-standy configuration.  I have an L2 GRE tunnel between the two to extend a VLAN and to be able to use VRRP for a master/standby setup.

 

You get the usual config sync and you also get the benefit of RAP whitelist sync that you won't get in a master/local setup.  Some don't like GRE tunnels, but they've been around since most of those folks were on their paper route.

Contributor I
Posts: 24
Registered: ‎01-03-2012

Re: Best way to setup two controllers in seperate data centers

Thanks for all the replies. I have setup in the master/local setup. All is good. 

Aruba Employee
Posts: 509
Registered: ‎07-03-2008

Re: Best way to setup two controllers in seperate data centers

Be careful with a master/local configuration, there are caveats and situations that can lead to undesirable results.  You may want to run your setup by your SE before you get too far in.

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