Summit X770 Stacking

The stacking-support option is enabled by default for X770 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 X770 switches. For more information, see Selecting Native and Alternate Stacking Ports.

Table 1. Stacking Methods for X770 Switches
Stacking Method Speed per Link (HDX) Cable Type and Lengths
SummitStack-V (ports 103 and 104) 10 Gbps 1m and 2m QSFP+ 4xSFP+ fan-out cable
SummitStack-V160 (ports 103 and 104) 40 Gbps 0.5m, 1m, and 3m (26 AWG) QSFP+
SummitStack-V320 (ports 101 and 103, and 102 and 104) 80 Gbps (combined over paired ports) 0.5m, 1m, and 3m (26 AWG) QSFP+

Native Stacking for X770 Switches

The X770 supports SummitStack-V80, V160, and V320 stacking. Use any Extreme Networks certified 40G QSFP+ cable or optical transceiver to make the connections among the switches to be stacked.

For X770 native stacking, use the fixed 40G QSFP+ ports numbered 101, 102, 103, and 104 (shown in Location of Stacking Ports (101 through 104) on an X770 Switch).

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Location of Stacking Ports (101 through 104) on an X770 Switch

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

Alternate Stacking for X770 Switches

Alternate Stacking Ports for X770 Switches summarizes alternate stacking support for X770 switches.

Table 2. Alternate Stacking Ports for X770 Switches
Switch Model Type or location of Native Stacking Ports Alternate Stacking Ports Location of Alternate Stacking Ports
X770-32q Ports 101,102,103,104 103,104 Front panel
Note

Note

Ports 103 and 104 are not available as data ports when the alternate stacking ports are used. Ports 101 and 102 remain available to use as data ports.

Additional Stacking Considerations for X770 Switches

Before deploying a new stack with Summit X770 switches, consider the following guidelines: