Installation Guide

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 275.
Table 139: 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.
• For SummitStack-V320 stacking, use ports 49, 53, 57, and 61.
X670-G2-72x switches support do not support native stacking.
7
Combined over paired ports
Building Stacks Stacking Considerations for Each Switch Model
Summit Family Hardware Installation Guide 271