Aruba controllers heartbeat High Availability

Anyone knows Aruba controllers well?   They normally pass through the same VLAN on the main switch, or the management VLAN.
Wonder why Aruba not recommending doing a direct heartbeat between Active and Passive controllers.  Using 7030 controllers at this point.
Normally I do a direct heartbeat between Cisco controllers.  But Cisco has a dedicated HA port for this.  Arubas not.  7030 controllers have 8 fiber and 8 copper ports.
 Anyone knows about it and have an advice?
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Tiras25Asked:
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Soulja53 6F 75 6C 6A 61 Commented:
From my understanding. Arubu 7030's do not need to be on the same vlan for the heartbeat connection. They can communicate over Layer 3.

Check out this link also:
https://community.arubanetworks.com/t5/Wireless-Access/Recommended-Redundancy-Deployment-for-2-7030-controllers-50-APs/td-p/293538
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Tiras25Author Commented:
so is it recommended to HA over the main switch vs.  directly?
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Soulja53 6F 75 6C 6A 61 Commented:
Yes, it seems from Aruba's deployment models, the active/stanby ip addresses in an HA group just need to be reachable over layer 3 to work. Additionally, it looks like Aruba AP's can be pointed to two controllers ip's as active and standby, and control their own failover.
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