Available Stacking Methods

Most Extreme Networks switch models can use various methods of stacking.

SummitStack Methods shows the switch models that can participate in each stacking method.

SummitStack Methods

Stacking Method	Speed per Link (HDX)	Cable Type and Lengths	Switch Models
SummitStack	10 Gbps	0.5 m, 1.5 m, 3.0 m, 5.0 m, 20 Gb Stacking Cable	X460-G2
SummitStack-V	10 Gbps	0.5 m - 40 km SFP+, XENPAK (with SR, LR, and ER)	X440-G2 X450-G2 (10G models) X460-G2 (1G models with VIM-2x, VIM-2ss) X460-G2 (10G models) X620 X670-G2 X770 (ports 103,104)
SummitStack-V80 (supported in EXOS 30.1 and prior releases only)	20 Gbps	0.5 m - 100 m QSFP+ only	X670-G2-48x-4q (ports 57, 61)
SummitStack-V84	21 Gbps	0.5 m - 5 m QSFP+ passive copper	X450-G2 (rear panel 21G stacking ports)
SummitStack-V160	42 Gbps	0.5 m - 100 m QSFP+ only	X460-G2 (VIM-2q) X670-G2-48x-4q (ports 57, 61) X770 (ports 103 and 104)
SummitStack-V160	40 Gbps	0.5 m - 100 m QSFP28	X695 (ports 61, 62)
SummitStack-V320	80 Gbps	0.5 m - 100 m QSFP+ only	X670-G2-48x-4q (ports 49, 53, 57, 61) X770-32q (ports 101 and 103, and 102 and 104)
SummitStack-V400	106 Gbps	0.5 m - 20 m QSFP28 only	X590 (ports 61, 69) X690 (ports 61, 69) X695 (ports 61, 62) X870 (ports 121, 125)
SummitStack-V400 Alternative Configuration	100 Gbps	V400 Alternative Configuration is required when using specific fiber cables. This mode sets the stack ports to 100G, enables pre-emphasis, and FEC (clause_91). QSFP28 SR4 QSFP28 LR4 QSFP28 CWDM4 QSFP28 PSM4 QxQ AOC cable - 5m QxQ AOC cable - 7m QxQ AOC cable - 10m QxQ AOC cable - 20m	X590 (ports 61, 69) X690 (ports 61, 69) X695 (ports 61, 62) X870 (ports 121, 125)

For more details about the stacking methods that are available for each switch series, see the topics listed in Stacking Considerations for Each Switch Model.

Note

Because all switches in the stack must run the same version of ExtremeXOS, it is not possible to stack switches that require ExtremeXOS version 21, for example the X440-G2 and the X620, with switches that are incompatible with ExtremeXOS version 21, for example the X440 and the X460.