Do I really need a loopback address?

Aruba Employee
Aruba Employee

Product and Software: This article applies to all Aruba controllers and ArubaOS versions.


For a controller to communicate with rest of the network, only an IP interface associated to a VLAN is needed. A loopback interface is not a must. On the other hand, it is not advisable to have a loopback(or management address) and no IP interface associated to any of the VLANs. When you use the loopback interface, assign a routable IP from one of the VLANs local to the controller.


You can use loopback interface for sourcing the traffic from the controller.


For example:

(A200)(config) #ip radius source-interface loopback


Here is how you would configure the loopback address:


(A200) (config) #show ip interface b



Interface IP Address / IP Netmask Admin Protocol


vlan 1 / up down


vlan 400 / up up


loopback / up up


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Last update:
‎07-02-2014 12:08 PM
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