Alcatel OS6400-24 Guía de usuario descargar pdf (Pagina 121)

Managing OmniSwitch 6400 Series Stacks Hot-Swapping Modules In a Stack

OmniSwitch 6400 Series Hardware Users Guide July 2010 page 6-23

Hot-Swapping Modules In a Stack

As with chassis-based switches, such as the OmniSwitch 9700/9800, NI modules within an OmniSwitch

6400 Series virtual chassis are hot-swappable. NI modules are essentially those modules operating in the

stack in idle mode. These modules can be removed from, or added to, an existing stack without disrupting

other modules in the stack.

Removing Switches from an Existing Stack

When removing switches from an existing stack, observe the following important guidelines:

• Do not attempt to hot-swap modules operating in primary or secondary management roles

• Be sure the stacking cables and stacking cable redundancy are not disrupted

Hot-swapping is intended for switches in idle and, if applicable, pass-through status only. Removing

primary or secondary management modules from a stack will trigger a failover sequence, i.e., one or more

additional modules within the stack must reload in order to reassign the management roles. Whenever

possible, avoid removing a switch that is operating as a primary or secondary management module.

Also, removing a switch from a stacked configuration can disrupt stack cabling at the rear of the stack.

When removing a module, be sure that stacking link integrity, including important stacking cable redun-

dancy, is maintained between all remaining modules. For more information on stacking cable connec-

tions, refer to page 6-16.

Inserting Switches Into an Existing Stack

When inserting switches into an existing stack, observe the following important guidelines:

• Avoid duplicate saved slot numbers

• Never attempt to operate more than eight switches in a single stack

• Make sure all switches are running the same software version.

Note. Other stackable Alcatel-Lucent products, such as the OmniSwitch 6850 switch, cannot be added to

an OmniSwitch 6400 Series virtual chassis.

To avoid duplicate slot numbers, simply make sure that any modules being added to an existing stack have

been cleared of preassigned slot information. In other words, verify that there is no boot.slot.cfg file

present in the /flash directory of any switch being added. When the switch is connected to the existing

stack and booted, the system software automatically assigns it a unique slot number. No duplicate slot

errors occur.

Note. If it is preferable to add a switch with an existing boot.slot.cfg file to a stack, be sure that the saved

slot number of the incoming switch is not already assigned to a switch operating in the stack.

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Alcatel OS6400-24 Guía de usuario Pagina 121