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Alcatel-Lucent 6600 Series Manual De Usuario

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Managing OmniSwitch 6600 Series Stacks
Stack Overview
OmniSwitch 6600 Series Hardware Users Guide
April 2004
page 3-3
Stack Overview
By default, OmniSwitch 6600 series switches operate in stand-alone mode. You can also configure two to 
eight OmniSwitch 6600 series switches (in any combination of OmniSwitch 6624, 6600-U24, and 6648 
switches) into one large virtual chassis known as a stack. With stacks, you can easily expand your switch-
ing capacity simply by adding additional switches. For example, you can start with a stack composed of 
two switches and add switches (up to eight) as network demands increase.
Note on Terminology. In the user guides provided with your OmniSwitch 6600 series switch, the terms 
switch, slot and NI (Network Interface) refer to individual OmniSwitch 6600 series units in stand-alone 
mode or within a stack. The term CMM (Chassis Management Module) refers to OmniSwitch 6600 series 
units operating in a stack in a primary or secondary CMM role. (OmniSwitch 6600 series switches operat-
ing in an idle CMM role would normally be referred to as a switch, slot, or, NI.)
Stacks also provide enhanced resiliency and redundancy features. If a switch in a stack goes down or is 
offline, the stack will continue to operate without user intervention. In addition, when a switch auto-
synchronizes at boot-up or if you manually synchronize the switches (see 
 for more information) switch operating software and configuration parameters are 
backed up on all switches in the stack. Therefore if software is corrupted or damaged the original operat-
ing software and parameters can be recovered.
Switches are connected to each other in a stack with stacking modules. (See 
 in this manual for more information.) These stacking modules 
provide high-speed, dual-redundant links between switches in a stack. The figure below shows an exam-
ple of a stack composed of four switches. Every switch in a stack is connected to other switches in a stack 
in a dual-redundant “daisy-chain” manner.
A Stack Composed of Four OmniSwitch 6648 Switches
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niSwitch 66
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MP
FA
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This stack is composed of four OmniSwitch 
6648 switches. All switches in this stack are 
connected together in a dual-redundant 
“daisy-chain” manner.