Installation Guide

The stacking port selection option, which allows you to choose between native and alternate ports, is
enabled by default for X670-48x and X670V switches. For more information, see Selecting Native and
Alternate Stacking Ports on page 275.
Table 136: Stacking Methods for X670-48x Switches
Stacking Method Speed per Link (HDX) Cable Type and Lengths
SummitStack-V (front panel) 10 Gbps 0.5m–40km
SFP+
SummitStack-V160 40 Gbps 0.5m–100m
QSFP+ only
SummitStack-V320 80 Gbps 0.5m–100m
QSFP+ only
Table 137: Stacking Methods for X670V Switches
Stacking Method Speed per Link (HDX) Cable Type and Lengths
SummitStack-V (front panel) 10 Gbps 0.5m–40km
SFP+
SummitStack-V80
(with VIM3-40G4X)
20 Gbps 0.5m–100m
QSFP+ only
SummitStack-V160
(with VIM4-40G4X)
40 Gbps 0.5m–100m
QSFP+ only
SummitStack-V320
(with VIM4-40G4X)
80 Gbps
6
0.5m–100m
QSFP+ only
Native Stacking for X670V Switches
For X670V native stacking, install a VIM4-40G4X module into the rear of the switch. Use any Extreme
Networks certified 40G QSFP+ cable or optical transceiver to make the connections among the
switches to be stacked.
In SummitStack-V160 mode:
• Port S3 on the VIM4-40G4X module serves as stack port 1. The ExtremeXOS operating system
displays this port as port 49.
• Port S4 on the VIM4-40G4X module serves as stack port 2. The ExtremeXOS operating system
displays this port as port 53.
In SummitStack-V320 mode:
• Ports S1 and S3 on the VIM4-40G4X module serve collectively as stack port 1. The ExtremeXOS
operating system displays these ports as ports 49 and 57.
• Ports S2 and S4 on the VIM4-40G4X module serve collectively as stack port 2. The ExtremeXOS
operating system displays these ports as port 53 and 61.
6
Combined over paired ports
Building Stacks Stacking Considerations for Each Switch Model
Summit Family Hardware Installation Guide 269