Installation Guide

2 = Stacking ports
Use any standard SummitStack stacking cables to connect the stacking ports.
Alternate stacking is supported for most X440 switches, as summarized in Table 120.
Table 120: Alternate Stacking Ports for X440 Switches
Switch Model Type or location of Native
Stacking Ports
Alternate Stacking
Ports
Location of Alternate
Stacking Ports
X440-24t-10G
X440-24x-10G
X440-24p-10G
None 25,26 Front panel
X440-48t-10G
X440-48p-10G
None 49,50 Front panel
Note
• On X440 24-port switches, ports 25 and 26 are not available as data ports when the
alternate stacking ports are used.
• On X440 48-port switches, ports 49 and 50 are not available as data ports when the
alternate stacking ports are used.
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 252.
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 275.
Table 121: 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
Building Stacks
Stacking Considerations for Each Switch Model
Summit Family Hardware Installation Guide 257