Installation Guide

X590 Stacking
X590 series switches can be stacked with other X590 switches, with X690 switches, X695 switches, and
with X870 switches. X590 series switches support native stacking using front-panel data ports 29 and
33.
Alternate stacking is not supported for X590 switches.
The stacking-support option is disabled by default for all X590 switches. For more information, see
Enabling and Disabling the Stacking-Support Option on page 193.
Table 86 summarizes stacking support for X590 switches.
Note
Only QSFP28 direct-attach passive copper cable, at lengths up to 5 meters, can be used in
X590 stacking ports.
Table 86: Stacking Methods for X590 Switches
Stacking Method Speed per Link (HDX) Cable Type and Lengths
SummitStack-V400 (Front panel ports 29, 33) 106 Gbps 0.5m - 20m
QSFP28
SummitStack-V160 (Front panel ports 29, 33) 42 Gbps 0.5m - 40Km
QSFP+
X620 Stacking
See X620 Stacking on page 89 for a full description of the X620 switch's stacking capabilities.
The stacking-support option is enabled by default for X620 switches. For more information, see
Enabling and Disabling the Stacking-Support Option on page 193.
The stacking port selection option, which allows you to choose between native and alternate ports, is
enabled by default for X620 switches. For more information, see Selecting Native and Alternate
Stacking Ports on page 207.
Table 87: Stacking Methods for X620 Switches
Stacking Method Speed per Link (HDX) Cable Type and Lengths
SummitStack-V (Front panel 10G models) 10 Gbps 0.5m–40km
SFP+
Building Stacks Stacking Considerations for Each Switch Model
ExtremeSwitching Hardware Installation Guide 203