Stacking Terminology; Stack Unit Roles; Stacking Terms - Arris Ruckus ICX 7850 Series Configuration Manual

Refer to the following sections for information on ICX 7750 stacking:
• ICX 7750 stack configuration overview
• ICX 7750 stacking topologies
• Planning to build a stack with 802.1br switch port extender capability
Refer to the following sections for information on ICX 7850 stacking:
• ICX 7850 stack configuration overview
• ICX 7850 stacking topologies
For information about physical installation of each type of device, refer to the appropriate hardware installation guide.

Stacking terminology

Certain terms and roles specific to stacking are used throughout this guide. This section describes the roles stack units may
assume as well as terms key to understanding stacking.
NOTE
Refer to the Ruckus FastIron Campus Fabric Configuration Guide for terms specific to IEEE 802.1br and switch port
extender (SPX) capability.

Stack unit roles

• Active controller: Handles stack management and configures all system- and interface-level features.
• Standby controller: The stack member with the highest priority after the active controller. The standby controller takes
over if the current active controller fails.
• Stack member: A unit functioning in the stack in a capacity other than active controller or standby controller.
• Stack unit: Any device functioning within the stack, including the active controller and standby controller.
• Standalone unit: An eligible unit that is not part of a stack that can be interchanged with an active controller without
reload. A standalone unit becomes an active controller when any member joins the stack. An active controller becomes
a standalone when it loses all stack members.

Stacking terms

• Bootup role: The role a unit takes during the boot sequence. This role can be standalone, active controller, standby
controller, stack member, or PE (port extender, in an 802.1br Campus Fabric network).
• Clean unit: A unit that contains no startup flash configuration or runtime configuration. To erase old configuration
information, enter the erase startup-config command and reset the unit without entering the write memory
command. If a stack member is without an active controller, you can access its local console and enter the stack
unconfigure clean command to convert it to a clean unit. Converting a unit to a clean unit does not remove its loaded
licenses.
NOTE
An ICX 7650 device with startup-config flash using 40-Gbps stacking ports that has no other configuration is
treated as a clean unit. Because an ICX 7650 device that uses 40-Gbps stacking requires the rear-module
stack-40g command followed by the write memory and reload commands to change the default 100-Gbps
stacking ports to 40-Gbps stacking ports, the related startup-config flash must be present.
Ruckus FastIron Stacking Configuration Guide, 08.0.90
Part Number: 53-1005572-01
on page 136
on page 138
on page 150
on page 151
on page 55.
Stacking Overview
Stacking terminology
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