Alcatel OS6400-24 Guia do Utilizador descarregar pdf (Página 102)

Roles Within the Stack Managing OmniSwitch 6400 Series Stacks

page 6-4 OmniSwitch 6400 Series Hardware Users Guide July 2010

Important 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 “Synchronizing Switches in a Stack” on

page 6-35 for more information.

Redundant Management Module Failover (Three or More Switches)

Secondary

Primary

Idle

Secondary

Offline

Idle

Primary

Offline

Secondary

Idle

Primary

Idle

Secondary

Idle

A stack of four OmniSwitch 6400 Series switches is

operating normally. The stack consists of a primary

module, secondary module, and two elements operating

in idle status. (The software on all elements in the stack

is synchronized.)

The primary management module in the stack fails or is

taken offline (e.g., powered off or rebooted by the user).

The switch operating as the secondary management module

immediately takes over the primary role. Meanwhile, the

adjacent switch—previously operating in idle status—now

assumes the secondary management role.

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 NI module in the virtual

chassis, passing traffic via its Ethernet.

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Alcatel OS6400-24 Guia do Utilizador Página 102