Installation Guide

Stacking Considerations for Each Switch Model
The following topics list basic information and special considerations pertaining to stacking for each of
the ExtremeSwitching switch models.
•
X440-G2 Stacking on page 151
•
X450-G2 Stacking on page 152
•
X460-G2 Stacking on page 153
•
X590 Stacking on page 157
•
X620 Stacking on page 157
•
X670-G2 Stacking on page 158
•
X690 Stacking on page 159
•
ExtremeSwitching X695 Stacking on page 160
•
Summit X770 Stacking on page 160
•
X870 Stacking on page 162
X440-G2 Stacking
The stacking-support option is not enabled by default for X440-G2 10G switch models. For more
information, see Enabling and Disabling the Stacking-Support Option on page 149.
The stacking port selection option, which allows you to choose between native and alternate ports, is
enabled by default for X440-G2 10G switch models. For more information, see Selecting Native and
Alternate Stacking Ports on page 162.
Table 61: Stacking Methods for X440-G2 Switches
Stacking Method Speed per Link (HDX) Cable Type and Lengths
SummitStack-V
(Front panel 10G models)
10 Gbps 0.5m–40km
SFP+
Alternate stacking support is available on all X440-G2 10-gigabit models (10GE4) using two SFP+ ports,
when the switch has been enabled for stacking (enable stacking-support command). 10G
upgrade licensing is not required to enable stacking on the designated stack ports. Table 62 summarizes
alternate stacking support for the various X440-G2 switch models.
Table 62: Alternate Stacking Ports for X440-G2 Switches
Switch Model Type or location of Native
Stacking Ports
Alternate Stacking
Ports
Location of Alternate
Stacking Ports
X440-G2-12t-10GE4
X440-G2-12p-10GE4
Fixed (front panel) 15,16 Front panel
X440-G2-24t-10GE4
X440-G2-24p-10GE4
X440-G2-24x-10GE4
X440-G2-24t-10GE4-DC
Fixed (rear panel) 27,28 Rear panel
X440-G2-48t-10GE4
X440-G2-48p-10GE4
X440-G2-48t-10GE4-DC
Fixed
(rear panel, dedicated SFP+ port)
49,50 Rear panel
Building Stacks
ExtremeSwitching and Summit Switches: Hardware Installation Guide 151