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Build Stacks
SummitStack Terms
Table 15
describes the terms used for the SummitStack feature. These terms are listed in the
recommended reading sequence.
Table 15: List of Stacking Terms
Term
Stackable switch
Stacking port
Native stacking
Alternate stacking
Stacking link
Node
Stack
Stack topology
Stack path
Control path
Active node
Description
An ExtremeSwitching switch that provides two stacking ports and can
participate in a stack.
A physical interface of a stackable switch that is used to allow the
connection of a stacking link. Stacking ports are point-to-point links that
are dedicated for the purpose of forming a stack.
A stacking configuration in which stack members are connected using
either designated Ethernet data ports or dedicated stacking connectors.
A stacking configuration in which stack members are connected using 10-
Gbps Ethernet data ports that have been configured for stacking. These
ports are located either on the switch itself or on option cards installed on
the rear of the switch.
A cable that connects a stacking port of one stackable switch to a
stacking port of another stackable switch, plus the stacking ports
themselves.
A switch that runs the Switch Engine operating system and is part of a
stack. Synonymous with stackable switch.
A set of stackable switches and their connected stacking links made with
the intentions that: (1) all switches are reachable through their common
connections; (2) a single stackable switch can manage the entire stack;
and (3) configurable entities such as VLANs and link trunk groups can
have members on multiple stackable switches. A stack consists of all
connected nodes regardless of the state of the nodes.
A contiguously connected set of nodes in a stack that are currently
communicating with one another. All nodes that appear in the show
stacking command display are present in the stack topology.
A data path that is formed over the stacking links for the purpose of
determining the set of nodes that are present in the stack topology and
their locations in the stack. Every node is always present in a stack path
whether or not stacking is enabled on the node.
A data path that is formed over the stacking links that is dedicated to
carrying control traffic, such as commands to program hardware or
software image data for software upgrade. A node must join the control
path to fully operate in the stack. A node that is disabled for stacking does
not join the control path, but does communicate over the stack path.
A node that has joined the control path. The active node can forward the
control path messages or can process them. It can also forward data
traffic. Only an active node can appear as a card inserted into a slot when
the show slot {slot {detail} | detail } command is
executed on the primary node of the stack.
ExtremeSwitching 5720 Series Hardware Installation Guide
SummitStack Terms
45
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