Table 7: Native and Alternate Stacking Ports (continued)
Switch Model
Type or Location of Native
Stacking Ports
Alternate Stacking
Ports
Location of Alternate
Stacking Ports
5520-24T
5520-24W
5520-24X
Front panel: U1, U2
35, 36
5520-VIM-4X
5520-48T
5520-48W
5520-12MW-36W
5520-48SE
Front panel: U1, U2
59, 60
5520-VIM-4X
Note
Ports designated as U1 and U2 are Universal ports. These ports can be configured as either
stacking ports or Ethernet data ports. When stacking support is disabled, the Universal ports
will provide normal data communications.
SummitStack Terms
describes the terms used for the SummitStack feature. These terms are listed in the
recommended reading sequence.
Table 8: List of Stacking Terms
Term
Description
Stackable switch
An ExtremeSwitching switch that provides two stacking ports and can
participate in a stack.
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.
Native stacking
A stacking configuration in which stack members are connected using
either designated Ethernet data ports or dedicated stacking connectors.
Alternate stacking
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.
Stacking link
A cable that connects a stacking port of one stackable switch to a
stacking port of another stackable switch, plus the stacking ports
themselves.
Node
A switch that runs the Switch Engine operating system and is part of a
stack. Synonymous with
stackable switch
.
Stack
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.
Build Stacks
SummitStack Terms
ExtremeSwitching 5320 Series Hardware Installation Guide
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