Controllerless Networks

Hi experts,

 

I have always configured a VC IP in my Instant clusters, but I have never configured a VC DNS. What is the purpose of this? I have read the following:

 

"If the Virtual Controller IP is in a different subnet, configure the Virtual Controller mask, gateway, and VLAN"

 

http://www.arubanetworks.com/techdocs/Instant_40_Mobile/Advanced/Content/UG_files/virtual_controller/Virtual_Controller_IP_Ad.htm

 

It doesn't say anything about the VC DNS. Then, in my case where the VC IP are in the same subnet, do I need to configure the VC DNS?

 

Also I have found the Aruba Instant User Guide says the following:

 

"If the virtual controller IP address is in the same subnet as the Instant AP, ensure that you select Custom from the Virtual Controller network
settings drop-down list and configure the following details: Virtual Controller Netmask, Virtual Controller Gateway, Virtual Controller DNS, Virtual Controller VLAN"

 

That's the opposite of the first excerpt I wrote above:

 

"If the Virtual Controller IP is in a different subnet, configure the Virtual Controller mask, gateway, and VLAN"

 

Am I missing anything?

 

Regards,

Julián

Hi guys,

 

Any idea?

 

Regards,

Julián

You should not need it.  the VC gets DNS from DHCP.  You would only configure DNS if you were manually setting ip address information.

Hi Colin,

But in many cases I set the DNS IP along with the static IP in every IAP. In this cases if I set that DNS IP in the VC DNS field and leave blank the DNS field in every IAP, will all the IAPs get VC DNS address?

Regards,
Julián