Users Guide

114 | The Basic User-Centric Networks Dell Networking W-Series ArubaOS 6.4.x| User Guide
By default, you can only access the CLI from the serial port or from an SSH session. To use the CLI in a Telnet
session, you must explicitly enable Telnet on the controller.
Replacing a Controller
The procedures below describe the steps to replace an existing standalone master controller and/or a
redundant master controller. Best practices are to replace the backup master controller first, and replace the
active master controller only after the new backup controller is operational on the network. When you remove
the active controller from the network to replace it, the new backup controller takes over the active controller
role. When you add a second controller to the network, that second controller automatically assumes the role
of a backup controller.
This procedure assumes that the existing controllers have been upgraded to ArubaOS 6.2.x or later. If your
controllers are running earlier version of ArubaOS, upgrade them to 6.2.x or later before attempting to migrate them
to a newer controller model, such as a W-7000 or W-7200 Series controller.
Transferring Licenses
To replace a controller with manually added licenses, you will need to transfer those licenses to the new
controller as part of the replacement process.
If the controller being replaced was returned to Dell as an RMA, the license keys on the RMA controller cannot
be directly transferred to a new device, and must be regenerated. To generate new keys for a license on an
controller returned as an RMA:
1. Navigate to the Dell Software License Management website: licensing.dell-pcw.com.
2. Select Certificate Management > Transfer Certificates.
3. Click the Transfer link by the license you want to transfer to the replacement controller.
4. Enter the serial number of the replacement controller then click Transfer. The licensing website displays a
new activation key. Use this key to apply the license to the new controller.
Procedure Overview
The procedure to replace a backup or active master controller is comprised of the following tasks:
1. Change the VRRP Priorities for a Redundant Master Pair
2. Replacing a Controller on page 114
3. Stage the New Controller on page 115
4. Add Licenses to the New Controller on page 116
5. Backup Newly Installed Licenses on page 116
6. Import and Restore Flash Backup on page 116
7. Restore Licenses on page 117
8. Reboot the Controller on page 117
9. Modify the Host Name on page 118
10.Modify Topology Settings on page 118
11.Save your Configuration on page 119
12.Remove the Existing Controller on page 119
If your controller does not have any manually added licenses, skip steps 3, 4 and 6 of the following procedure.