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.

Table 1. 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

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)

SummitStack-V160 42 Gbps 0.5 m - 100 m

QSFP+

X590

X465

X690

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)

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

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.

1 Combined over paired ports