Alcatel-Lucent 6850-48 Hardware Manual
Managing OmniSwitch 6850 Series Stacks
Roles Within the Stack
OmniSwitch 6850 Series Hardware Users Guide
September 2009
page 4-5
Redundant Management Module Failover (Two Switches)
Primary
Secondary
Secondary
Offline
Primary
Offline
Secondary
Primary
!
A stack of two OmniSwitch 6850 Series switches is
operating normally. The stack consists of a primary
module and a secondary module. (The software on both
elements in the stack is synchronized.)
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
offline (e.g., powered off or rebooted by the user).
offline (e.g., powered off or rebooted by the user).
The switch operating as the secondary management module
immediately takes over the primary role. It is at this point
essentially operating as a stand-alone switch.
immediately takes over the primary role. It is at this point
essentially operating as a stand-alone switch.
If the switch that previously failed or was taken offline
comes back online, it will assume the secondary role in the
stack.
comes back online, it will assume the secondary role in the
stack.
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