Upgrading Two Controllers In 'Session Availability' Mode - Siemens SCALANCE WLC711 Maintenance Manual

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Note

At this point you should move just one AP manually to the upgraded controller. This will test the new

software without risking all the APs.

Upgrading Controller 1 from V9.21 to V9.21 FR1

Note

If you upgraded the software on the two controllers in session availability mode, you must perform a

controlled upgrade on the wireless APs. For more information, see

Software

on page 67.

Use the standard procedures via the Wireless Assistant GUI or CLI commands to upgrade the software.

When you upgrade Controller 1 from V9.21 to V9.21 FR1, it will reboot. Consequently, the 'availability'

feature automatically moves both AP-1 and AP-2 from Controller 1 to Controller 2. All clients registered

with these two APs get disconnected. They re-connect automatically (if configured to do so) either to a

different AP or to the same one after the service is restored.

After Controller 1 reboots, all 4 APs connect to Controller 2, which is still running V9.21. Controller 1 is

now upgraded to V9.21 FR1 and has the same prior configuration. All 4 APs are running V9.21 software.

Upgrading Controller 2 from V9.21 to V9.21 FR1

Use the standard procedures via the Wireless Assistant GUI or CLI commands to upgrade the software.

When you upgrade Controller 2 from V9.21 to V9.21 FR1, it will reboot. Consequently, the "Availability"

feature will automatically move all 4 APs from Controller 2 to Controller 1. Because Controller 1 was

upgraded to V9.21 FR1, all the 4 APs are upgraded as well. This causes a short disruption of service.

All clients on all the four APs get disconnected. They re-connect automatically (if configured to do so)

after the service is restored.

After Controller 2 reboots, all the four APs are associated with Controller 1. Both controllers are now

upgraded to V9.21 FR1 release and have the same prior configuration. All the four APs are also

upgraded to V9.21 FR1 release.

Manually Moving APs Back to Local Controller

Manually move AP-3 and AP-4 from Controller 1 to Controller 2, where they were configured as 'Local'

APs. After you manually move the APs, the network is back to its original configuration with each

controller running two APs.