Wireless Access

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Access network design for branch, remote, outdoor and campus locations with Aruba access points, and mobility controllers.
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Converting a Master HA controller Pair to a local VRRP pair

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  • 1.  Converting a Master HA controller Pair to a local VRRP pair

    Posted 30 days ago

    Hi everyone. I am new to the Aruba brand I am currently trying to prepare to move an independent Master/local controller that are in an HA Group  to join a master/standby VRRP pair (master/backup) that will be used as a central point for all configurations and management. This is not a mobility master(conductor) setup.

    I would like clarification on the following:
     - clarification on the terminology used by Aruba to describe the different setups
    - difference between a VRRP setup vs HA-group setup

    and I would like to know the following:
    - given that in the independent setup has centralized licensing and both controllers terminate APs. How to move this over to the new controller
    - What things should I consider? and how should I prepare before moving it
    - If you can provide steps for making this move.

    Thank you all.



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    Diego Arguello
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  • 2.  RE: Converting a Master HA controller Pair to a local VRRP pair

    Posted 29 days ago
    Have a look at the below doc, it provides a good overview for the redundancy options. This also provides you with the steps to achieve Master/Local or Master/Master Standby and the Licensing options.

    https://www.arubanetworks.com/assets/vrd/2018_01_02_Campus_6_x_Redundancy.pdf

    The main items to consider with VRRP vs HA Fast Failover is:

    - VRRP (L2) requires controllers to be in the same broadcast domain
    - HA Fast Failover allows for L2/L3 failover and is quicker (sub second) then VRRP since a Standby AP tunnel is already established.

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    Craig Syme
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  • 3.  RE: Converting a Master HA controller Pair to a local VRRP pair

    Posted 26 days ago
    Thank you so much Craig, that link has the information I needed. It is much clearer now. I have a remaining question though. The system that I am working now has a VRRP pair of master/standby setup controlling two locations with 2 local controllers each using VRRP (master/backup).

    - is there any benefit or is it possible at all using AP Fast failover on the master/standby master pair instead of vrrp, being that now we are dealing with IPSec tunnels to the local controllers only and not AP GRE tunnels?
    - a bit off topic, what’s the main differences between the master/backup controller setup vs a mobility conductor setup? And how does this affect AP load balancing at the HA local controllers?

    Thank you again for your prompt response!




  • 4.  RE: Converting a Master HA controller Pair to a local VRRP pair

    Posted 23 days ago

     is there any benefit or is it possible at all using AP Fast failover on the master/standby master pair instead of vrrp, being that now we are dealing with IPSec tunnels to the local controllers only and not AP GRE tunnels?

    -- You can indeed, you'd need to configure the Role as Dual in order to establish the Standby Tunnel.

    - a bit off topic, what's the main differences between the master/backup controller setup vs a mobility conductor setup? And how does this affect AP load balancing at the HA local controllers?

    -- With a Mobility Conductor, the management plane no longer resides on the controller. It is a separate device such as a VM or hardware appliance.



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    Craig Syme
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