Most Extreme Networks switch models can use various methods of stacking.
SummitStack Methods shows the switch models that can participate in each stacking method.
| 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 |
| 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 | 40 Gbps | 0.5 m - 40 km QSFP+ only |
X460-G2 (VIM-2q) X670-G2-48x-4q (ports 57, 61) |
| SummitStack-V160 | 42 Gbps | 0.5 m - 40 km QSFP+ |
X590 X465 X690 X695 5520 |
| SummitStack-V320 | 80 Gbps | 0.5 m - 100 m QSFP+ only |
X670-G2-48x-4q (ports 49, 53, 57, 61) |
| 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).
|
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.