White Papers

Assigning a Priority to Stacked Switches
By default, each stack unit is assigned priority 0.
The switch with the highest priority number is elected master. The switch with the next highest priority number is elected standby and
takes over stack management if the master switch fails. The range of valid priority values is from 1 to 14.
To congure or revert assigning stacked switch priority, use the following commands.
1 Congure a stack so that the roles are assigned according to pre-determined priorities instead of using the highest MAC addresses.
Global Conguration mode
stack-unit priority
2 Revert the management priority of a stack unit to the default value of 0.
Global Conguration mode
no stack-unit unit-number priority number
NOTE: If you recongure the priorities of stacked switches in an existing S5000 stack, reload the stack so that a new master and
standby election performs.
Renumbering a Stack Unit
By default, each stack unit is assigned the unit-number 0.
When you renumber a stacked switch in an existing stack:
• If you renumber the master switch, you are prompted to reload the entire stack.
• If you renumber the standby switch, only the switch reloads and is replaced by a member switch that is elected as the new standby.
• If you renumber a member switch, only the member switch reloads.
• If you renumber a switch to a number already assigned to another stack unit, an error message displays.
• Renumber a stack unit to pre-congure the numbering of the master, standby, and member units.
EXEC Privilege mode
stack-unit renumber
After you enter the command, you are prompted to reload the switch and save the stacking conguration.
Warning Message After Renumbering a Stack Unit
Dell#stack-unit 0 renumber 5
Renumbering management unit will reload the stack.
Warning: Interface configuration for current unit will be lost!
Proceed to renumber [confirm yes/no]:
Conguring Stacking Ports and Bringing Up a Stack
After you attach port cables to set up a stack of S5000 switches, bring up the stack by enabling stacking on the ports.
1 Power up a cabled S5000 switch and set up a connection as described in Accessing the Stack CLI.
2 Log on to the CLI and enter global conguration mode.
Login: username
Password: *****
Stacking
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