Users Guide

Split a Stack
To split an S5000 stack, unplug the port cables between member units at any time: while the stack is powered on or o and when
the units are online or oine.
Each portion of the split stack retains the startup and running conguration of the original stack.
For a stack that is split into two smaller stacks, each with multiple units:
• If one of the new stacks receives the master and standby units, it is unaected by the split.
• If one of the new stacks receives only the master unit, the master switch retains its role and a new standby is elected.
• If one of the new stacks receives only the standby unit, it becomes the master in the new stack and Dell Networking OS elects a
new standby.
• If one of the new stacks does not receive either the master or the standby unit, the stack is reset so that a new election takes
place.
Managing Redundant Stack Management
To manage the redundancy behavior in a stack, use the following redundancy commands.
• Reset the current stack master and make the standby unit the new master.
EXEC Privilege mode
redundancy force-failover stack-unit
A new standby is elected. When the previous stack master comes back online, it becomes a member unit.
• Prevent the stack master or stack unit from rebooting after a failover.
CONFIGURATION mode
redundancy disable-auto-reboot stack-unit
This command does not aect a forced failover, manual reset, or a stack-link disconnect.
• Display redundancy information.
EXEC Privilege mode
show redundancy
Resetting a Unit on a Stack
To reload any of the member units or the standby in a stack, use the following commands.
If you try to reset the stack master, an error message displays: Reset of master unit is not allowed.
• Reload a stack unit from the master switch.
EXEC Privilege mode
reset stack-unit unit-number
• Reload a member unit from the unit itself.
EXEC Privilege mode
reset-self
• Reset a stack-unit when the unit is in a problem state.
EXEC Privilege mode
reset stack-unit unit-number hard
Stacking
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