Summit X670 Stacking

Both X670-48x switches and X670V switches can participate in alternate stacking configurations using SummitStack-V.

Native stacking is possible only for X670V switches.

The stacking-support option is enabled by default for all X670-48x and X670V switches. For more information, see Enabling and Disabling the Stacking-Support Option.

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.

Table 1. 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 2. 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 Gbps¹	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 57.
Port S4 on the VIM4-40G4X module serves as stack port 2. The ExtremeXOS operating system displays this port as port 61.

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.

1 = QSFP+ ports (S3 and S4 are used for stacking)

2= Port LEDs

If ports 47 and 48 on an X670V switch are used as alternate stacking ports, ports 45 and 46 are not available to use as data ports.

For a complete listing of compatible cables and optical transceivers, see the Extreme Optics Compatibility website.

To join an X670-48x switch to an X460 switch in a stack, use SummitStack-V80 stacking.

To join an X670-48x switch to an X460-G2 switch in a stack, use SummitStack-V160 stacking.

Alternate Stacking for X670-48x and X670V Switches

Alternate Stacking Ports for X670 Switches summarizes alternate stacking support for X670-48x and X670V switches.

Table 3. Alternate Stacking Ports for X670 Switches
Switch Model	Type or location of Native Stacking Ports	Alternate Stacking Ports	Location of Alternate Stacking Ports
X670-48x	None	47,48	Front panel
X670V-48t X670V-48x	VIM4-40G4X	47,48	Front panel

Note

Ports 45 and 46 are not available as data ports when the alternate stacking ports are used.
On X670V-48t switches, alternate stacking ports are fiber medium only.

¹ Combined over paired ports