Avaya P580 - Manual (Page 265)

Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, v5.3.1 7-7
Configuring Redundancy Options
Figure 6-19. Switch Fabric Status Dialog Box
2. Select Yes from the Configure redundant Hardware field
pull-down menu on the Switch Fabric Status dialog box
(Figure 6-19).
3. Click APPLY. The Switch Fabric Status should now show the
redundant controller and element Available. (Figure 7-4)
4. Save the configuration.
* Note: If you disable and then reenable redundant hardware
after the Primary controller fails, the state of the failed
controller changes from Failed to Available.