X870 series switches support native stacking using front-panel data ports 121 and 125. They can be stacked with other X870 switches, with X590 switches, and with X690 switches. Alternate stacking is not supported.
The stacking-support option is disabled by default for all X870 switches. For more information, see Enabling and Disabling the Stacking-Support Option.
Stacking Methods for X870 Switches summarizes stacking support for X870 switches.
NoteOnly QSFP28 direct-attach passive copper cable, at lengths up to 5 meters, can be used in X870 stacking ports.
|Stacking Method||Speed per Link (HDX)||Cable Type and Lengths|
|SummitStack-V400 (Front panel ports 121,125)||106 Gbps||0.5 m – 5.0 m