Alcatel-Lucent OmniSwitch 6450 User Manual page 87

Managing OmniSwitch 6450 Stacks
Note. For management module redundancy to work effectively, the software on all switches operating in
the stack must be synchronized at all times. Refer to
for more information.
Primary
Secondary
Idle
Idle
!
Offline
Secondary
Idle
Idle
Offline
Primary
Secondary
Idle
Idle
Primary
Secondary
Idle
Redundant Management Module Failover (Three or More Switches)
OmniSwitch 6450 Hardware Users Guide
"Synchronizing Switches in a Stack" on page 6-37
A stack of four OmniSwitch 6450 switches is
1
operating normally. The stack consists of a pri-
mary module, secondary module, and two ele-
ments operating in idle status. (The software
The primary management module in the stack
2
fails or is taken offline (e.g., powered off or
The switch operating as the secondary manage-
3
ment module immediately takes over the primary
role. Meanwhile, the adjacent switch—previously
4
If the switch that failed or was taken offline comes
back online, it will assume an idle role in the
stack. In other words, it will act essentially as an
July 2012
Roles Within the Stack
page 6-5