Alcatel-Lucent OmniSwitch 6250 - Page 7

Contents
OmniSwitch 6250 Hardware Users Guide September 2015 vii
Chapter 7 Managing OmniSwitch 6250 Stacks ...............................................................................7-1
In This Chapter ................................................................................................................7-2
OmniSwitch 6250 Stacking Specifications .....................................................................7-3
Changing Stacking Mode on Metro Models ............................................................7-3
OmniSwitch 6250 Stack Overview .................................................................................7-4
Roles Within the Stack ....................................................................................................7-4
Primary and Secondary Management Modules .......................................................7-4
Primary Management Module Selection ...........................................................7-7
Secondary Management Module Selection .....................................................7-10
Idle Module Role ....................................................................................................7-12
Pass-Through Mode ...............................................................................................7-13
Recovering from Pass-Through Mode (Duplicate Slot Numbers) ..................7-14
Stack Cabling ................................................................................................................7-17
Redundant Stacking Cable Connection ..................................................................7-18
Checking Redundant Stacking Cable Status ..........................................................7-19
Slot Numbering .............................................................................................................7-20
Dynamic Slot Number Assignment ........................................................................7-21
Manual Slot Number Assignment ..........................................................................7-23
Reverting to the Dynamic Slot Numbering Model ..........................................7-24
Hot-Swapping Modules In a Stack ...............................................................................7-25
Removing Switches from an Existing Stack ..........................................................7-25
Inserting Switches Into an Existing Stack ..............................................................7-25
Merging Stacks .......................................................................................................7-26
Reloading Switches .......................................................................................................7-27
Reloading the Primary Management Module ........................................................7-27
Reloading the Secondary Management Module ....................................................7-29
Reloading Switches with Idle Roles .......................................................................7-31
Reloading Switches in Pass-Through Mode ..........................................................7-31
Reloading All Switches in a Stack .........................................................................7-32
Software Synchronization During a Full Reload .............................................7-32
Effects of Saved Slot Number Information on the Reload Process .................7-32
Avoiding Split Stacks .............................................................................................7-34
Changing the Secondary Module to Primary ................................................................7-35
Synchronizing Switches in a Stack ...............................................................................7-37
Automatic Synchronization During a Full Reload .................................................7-37
Stack Split Detection (SSP) ..........................................................................................7-38
Stack Split Key Components and Terms ................................................................7-38
Basic Operation ......................................................................................................7-39
Protection States .....................................................................................................7-39
Stack Split Recovery .......................................................................................7-39
Monitoring the Stack .....................................................................................................7-41
Visually Monitoring the Stack ...............................................................................7-42