Alcatel-Lucent OmniSwitch 6250-M Hardware User's Manual page 108

Roles Within the Stack
Primary
Secondary
!
Offline
Secondary
Offline
Primary
Secondary
Primary
page 6-6
Preliminary
9/28/09
Redundant Management Module Failover (Two Switches)
OmniSwitch 6250 Series Hardware Users Guide
Managing OmniSwitch 6250 Series Stacks
A stack of two OmniSwitch 6250 Series switches is
1
operating normally. The stack consists of a primary
module and a secondary module. (The software on both
elements in the stack is synchronized.)
The primary management module fails or is taken
2
offline (e.g., powered off or rebooted by the user).
The switch operating as the secondary management module
3
immediately takes over the primary role. It is at this point
essentially operating as a stand-alone switch.
4
If the switch that previously failed or was taken offline
comes back online, it will assume the secondary role in the
stack.
September 2009