Users Guide

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
pe-id — port extender identifier. The range is 0 through 255.
The following example shows the redundancy force-failover pe command.
Dell#redundancy force-failover pe 3
A new standby is elected. When the former stack master comes back online, it becomes a member
unit.
• Reset redundancy counters on a PE.
EXEC Privilege mode
redundancy reset-counter pe pe-id
Port Extender (PE) Stacking
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