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Occasional Contributor II

Aruba Contoller IP Change

Hi,

I have a project of migration for two Aruba controllers (Master and Standby setup) from one location to another, this migration will require to change the IP addresses and the Hostnames of the two controllers. 

The current setup is having a vrrp on vlan 1 which at the same time represents the controller IP on both controllers. I would like to know what could be the effect of changing the controllers IP on other configuration and how the routing will be done, knowing that there are two subnets as follows:

1- Vlan 1 for controller IP and lms/bck lms IP in the AP-group.

2- vlan 18 which is the default gateway for the traffic.

3- There are two connections between each controller and the core SW

 

Also, I want to know how the current AP will get the new IP of the master controller after the changes, we are using DNS entry for aruba-master for the current master discovery process and the APs get their IP using a DHCP server. APs have different locations and not in one network.

 

Appreciate it if one can help me in this regard.  

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Guru Elite

Re: Aruba Contoller IP Change

What version of ArubaOS are you running?

Where do you make configuration changes?

 


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
ArubaOS 8.5 User Guide
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Occasional Contributor II

Re: Aruba Contoller IP Change

Version 6.5.4.6, and changes will be done onsite through console after physically shifting the controllers to the new location. 

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Guru Elite

Re: Aruba Contoller IP Change

That should not be an issue.  In 6.4.5.6, the ip address, subnet mask, default gateway are configured on the individual controller.  You could configure those parameters using the console after the controller is moved to the new site.


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
ArubaOS 8.5 User Guide
InstantOS 8.5 User Guide
Airheads Knowledgebase
Airheads Video Knowledge Base
Remote Access Point Solution Guide
ArubaOS Consolidated Release Notes
ArubaOS 8 ViA VPN Solution Guide
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Occasional Contributor II

Re: Aruba Contoller IP Change

my concern is that what other configurations related to the controller IP and Hostname which should be changed also? 

Another thing is that how the AP will get the new IP of the master controller?  knowing that it is getting the IP now through the DNS entry of aruba-master, so that should be changed also to the new IP am I right ?

 

Guru Elite

Re: Aruba Contoller IP Change

1.  Figure out how your access points discover the current controller addresses.

2.  Change those after the migration.

3.  If your access points are statically assigned, you would want to change that to a dynamic method, otherwise, you will have to take your access points down and use a console cable.


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
ArubaOS 8.5 User Guide
InstantOS 8.5 User Guide
Airheads Knowledgebase
Airheads Video Knowledge Base
Remote Access Point Solution Guide
ArubaOS Consolidated Release Notes
ArubaOS 8 ViA VPN Solution Guide
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Occasional Contributor II

Re: Aruba Contoller IP Change

Actually this my first time interacting with Aruba products so I don't know much information about it so please excuse me if I am asking silly questions. 

The attached snap is from one AP and it shows the master discovery selection, is it dynamic or static right now?

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Guru Elite

Re: Aruba Contoller IP Change

If there is something in that master ip address field, it is statically pointing to the ip address on that controller when the access point cold boots.  I would (1) configure aruba-master.<yourdomain> to point to your controller (2) reprovision that access point without that ip address and (3) see if it comes back up on that controller, or any controller.  If #3 works, that means you are good to use aruba-master to point access points.  It also means that if you move the controller, you would have to remove the ip address in the "master" field otherwise your APs will not use DNS discovery after you move your controllers.


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
ArubaOS 8.5 User Guide
InstantOS 8.5 User Guide
Airheads Knowledgebase
Airheads Video Knowledge Base
Remote Access Point Solution Guide
ArubaOS Consolidated Release Notes
ArubaOS 8 ViA VPN Solution Guide
Highlighted
Occasional Contributor II

Re: Aruba Contoller IP Change

Yes, there is, it is the Virtual IP address of the VRRP group for the two controllers.

ok, I will test and see the results but I already have an entry in the DNS for aruba-master with the same IP address in this field so I was thinking that my APs are taking their master IP through the DNS not statically as you mentioned.

 

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Guru Elite

Re: Aruba Contoller IP Change

If an ip address appears in that field, the AP does not do any dns or dhcp discovery.  That ip address is burned into the AP's flash memory and will survive a reboot.  You need to make sure that none of the APs have that ip address, otherwise they will not be able to find the controller(s) after you move them.  The only saving grace would be if the access points are on the same layer 2 subnet as the controller; if that is the case, they can find the controller using a broadcast.

 


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
ArubaOS 8.5 User Guide
InstantOS 8.5 User Guide
Airheads Knowledgebase
Airheads Video Knowledge Base
Remote Access Point Solution Guide
ArubaOS Consolidated Release Notes
ArubaOS 8 ViA VPN Solution Guide
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