Installation Guide

Table 69 summarizes alternate stacking support for X620 switches.
Table 69: Alternate Stacking Ports for X620 Switches
Switch Model Type or location of Native
Stacking Ports
Alternate Stacking
Ports
Location of Alternate
Stacking Ports
X620-8t-2x
X620-10x
None 9,10 Front panel
X620-16t
X620-16x
X620-16p
None 15,16 Front panel
Note
The stacking ports on X620 switches do not support 10GBASE-T optics.
X670-G2 Stacking
The stacking-support option is enabled by default for X670-G2 switches. 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 X670-G2 switches. For more information, see Selecting Native and Alternate
Stacking Ports on page 162.
Table 70: Stacking Methods for X670-G2 Switches
Stacking Method Speed per Link (HDX) Cable Type and Lengths
SummitStack-V
all X670-G2 switch models
10 Gbps SFP+ to SFP+
SummitStack-V80 (supported in EXOS 30.1 and
prior releases only)
model 48x-4q only
20 Gbps QSFP+ to QSFP+
SummitStack-V160
model 48x-4q only
40 Gbps QSFP+ to QSFP+
SummitStack-V320
model 48x-4q only
80 Gbps QSFP+ to QSFP+
Native Stacking for X670-G2 Switches
For X670-G2 native stacking, use the 4 x 40 Gb interfaces that are fixed on the front of the switch. Use
any Extreme Networks certified 40G QSFP+ cable or optical transceiver to make the connections
among the switches to be stacked.
For a complete listing of compatible cables and optical transceivers, see the Extreme Hardware/
Software Compatibility and Recommendation Matrices.
X670-G2-48x-4q switches support native stacking using V160 and V320.
•
For SummitStack-V160 stacking, use ports 57 and 61.
3
Combined over paired ports
Building Stacks
ExtremeSwitching and Summit Switches: Hardware Installation Guide 158