Specifications

Extreme Networks Technical Brief
Stack State – A state assigned by the stack to a node. This
can be displayed using the command show stacking.
Stack Topology – 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.
Stackable Switch – A Summit family switch that provides
two stacking ports and can participate in a stack.
Stacking Link – A wire that connects a stacking port of
one stackable switch to a stacking port of another stackable
switch, plus the stacking ports themselves.
Stacking Port – 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.
Standby Node Role – A node that is executing the standby
node role is prepared to become a backup node in the event
that the backup node becomes the master node. When
becoming a backup node, the new master node synchronizes
all of its databases to the new backup node. As a standby
node, most databases are not synchronized, except for those
few that directly relate to hardware programming.
System Uptime – This is the amount of time that has
passed since a stack first elected a master node after the
stack last rebooted. The time can be displayed on a master
node by entering the show switch {detail} command.
Node Role Election – This is the process that determines
the role for each node. The election takes place during
initial stack startup and elects a master and a 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 – For each node, the stack
computes a priority 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 – This is 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.
Stack – A stack is 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 these nodes.
Stack Path – 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.
Stack Segment – This is 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.
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