Administrator Guide

Renumbering a Stack Unit
By default, the number of a PE stack unit is 0. After you create and power on a PE stack, the units automatically number from 0
to 7, starting at 0. To change the default or automatically assigned stack unit number, use the pe renumber command.
NOTE: You can renumber a unit only when it is online and if no unit with the new stack-unit number is online.
● Configure a stack-unit number.
EXEC Privilege mode
pe pe-id stack-unit unit-id renumber unit-id
Where:
○ pe pe-id is the PE ID number. The range is from 0 to 255.
○ stack-unit unit-id is the stack-unit ID number. The range is from 0 to 7.
○ renumber renumber is the new stack-unit ID.
Dell# pe 200 stack-unit 3 renumber 5
Renumbering the stack master triggers a stack reload, as shown in the following message. When the stack comes back online,
the master unit remains the management unit.
Renumbering management unit will reload the stack.
WARNING: Interface configuration for current unit will be lost!
Proceed[confirm yes/no]: yes
Prioritizing Stack Units
In a PE stack, by default, the stack unit with the highest MAC address is elected master; the stack unit with the second highest
MAC address is elected standby. To change the default master and standby assignment, you can assign stack-unit priorities. If
multiple units tie for the highest priority, the unit with the highest MAC address is elected master.
NOTE: You can configure a stack-unit priority only when the unit is online.
1. Enter Port-Extender Configuration mode.
CONFIGURATION mode
pe pe-id
2. Configure a stack-unit priority.
PORT-EXTENDER CONFIGURATION mode
stack-unit unit-number priority priority
Where:
● unit-number — The stack-unit number. The range is from 0 to 7.
● priority — The unit with the numerically highest priority is elected the master management unit; the unit with the
second highest priority is the standby unit. The range is from 1 to 14. There is no default.
Dell(conf)#pe 2
Dell(conf-pe-2)#stack-unit 0 priority 14
Dell(conf-pe-2)#stack-unit 1 priority 13
Managing PE Stack Redundancy
To manage the master and standby redundancy in a PE stack, use the following commands.
● Reset the current management unit and make the standby unit the new master unit.
EXEC Privilege mode
redundancy force-failover pe pe-id
Port Extender (PE) Stacking
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