Non-supported Hitless Stacking Events

The following events are not supported by hitless stacking. These events require a software reload, affecting data traffic.

  • Unit ID change - When a stack is formed or when a unit is renumbered using stack interactive-setup.
  • Stack merge - When the old active controller comes back up, it reboots. If it has fewer members than the present active controller, it loses the election, regardless of its priority. If it has a higher priority, it becomes the standby controller after the reboot and is synchronized with the active controller. Next, a switchover occurs, and it again becomes the active controller.
  • Stack upgrade - Software cannot be upgraded on stack units without impact on traffic, unless the upgrade is performed through ISSU. Refer to the RUCKUS FastIron Software Upgrade Guide for more information.
Parent topic: Hitless Stacking