Installation Guide

Table 78: List of Stacking Terms (continued)
Term Description
Node role election The process that determines the role for each node. The election takes
place during initial stack startup and elects one master node and one
backup node. An election also takes place after a master node failover,
when a new backup node is elected from the remaining standby nodes.
Node role election priority A priority assigned to each node, to be used in node role election. The
node with the highest node role election priority during a role election
becomes the master node. The node with the second highest node role
election priority becomes the backup.
Operational node A node that has achieved operational state as a card in a slot. The
operational state can be displayed using the show slot {slot
{detail} | detail }command.
System uptime The amount of time that has passed since the last node role election. You
can display the system uptime by entering the show switch
{detail } command on the master node.
Stack segment A collection of nodes that form a stack topology. The term is useful when
a stack is severed. Each severed portion of the stack is referred to as a
stack segment.
Stack state A state assigned by the stack to a node. You can display the stack state by
entering the show stacking command.
Easy Setup A procedure that automatically configures the essential stacking
parameters on every node for initial stack deployment, and then
automatically reboots the stack to put the parameters into eect.
The choice to run Easy Setup is oered when you run the enable
stacking {node-address node-address} command and the
essential stacking parameters are unconfigured or inconsistent. It can also
be invoked directly by running the configure stacking easy-
setup command.
Plan to Create Your Stack
Use the information in the following topics to plan the physical makeup of your stack – switches,
versatile interface modules (VIMs), and cables – and the stacking protocols you will use. Included are:
• Guidelines and other information for each switch model in your stack
• Considerations for combining dierent switch models in a stack
• Information about stacking cables
Enabling and Disabling the Stacking-Support Option
The stacking-support option is enabled by default for many switch and option card configurations.
However, some configurations require you to enable the stacking-support option before a switch can
participate in a stack.
Building Stacks
Plan to Create Your Stack
ExtremeSwitching Hardware Installation Guide 193