Controller Based WLANs

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What is the difference between AP and RAP for Aruba Controller Discovery? 

Sep 19, 2014 08:56 AM

Answer :

 

 

Product and Software: This article applies to all Aruba AP and it's version

Aruba AP (s) has certain step to discover the Master controller however there is a basic difference between Aruba AP and Aruba RAP.

AP: Access Points (Deployed in local LAN network or contacting the controller over private WAN i.e Frame Relay, MPLs etc.)
RAP: Remote Access Point (Deployed over unsecured WAN i.e Internet)

On boot, AP will use some discovery mechanism

1. Static (setenv master <controller IP>)
2. DHCP Option 43 (Controller IP) and Option 60 Vendor Specific Attribute (ArubaAP)
3. ADP Broadcast (255.255.255.255)
4. ADP Multicast (239.0.82.11)
5. DNS A Record "aruba-master.domain.com") to find a controller to get code/config from.

However RAP does not support ADP/DNS (aruba-master)/DHCP (option 43) based discovery of controller because RAP must be provisioned statically with controller's ip-address or FQDN.

 

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