Available Stacking Methods

Each ExtremeSwitching switch model can use various methods of stacking.

SummitStacking by Stacking Method shows the switch models that can participate in each stacking method.

Table 1. SummitStacking by 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,

20Gb Stacking Cable

ExtremeSwitching X460-G2 (using VIM-2SS)
SummitStack-V 10 Gbps 0.5 m - 40 km

SFP+ (with SR, LR, and ER)

ExtremeSwitching X440-G2

ExtremeSwitching X450-G2 (10G models)

ExtremeSwitching X460-G2 (1G models with VIM-2x)

ExtremeSwitching X460-G2 (10G models)

ExtremeSwitching X620

SummitStack-V84 21 Gbps 0.5 m - 5 m

QSFP+ passive copper

ExtremeSwitching X450-G2 (rear panel 21G stacking ports)
SummitStack-V160 40 Gbps 0.5 m - 40 kM

QSFP+ only

ExtremeSwitching X460-G2 (VIM-2q)

* ExtremeSwitching X590 (ports 29, 33)

* ExtremeSwitching X465 (ports S1 and S2)

* ExtremeSwitching X695 (ports 61, 62)

Note: * The X465, X590, and X695 can stack with each other, but not with other V160-capable switches.
SummitStack-V400 106 Gbps 0.5 m - 100 m

QSFP28 only

ExtremeSwitching X590 (ports 29,33)

ExtremeSwitching X695 (61, 62)

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

ExtremeSwitching X590 (ports 29,33)

ExtremeSwitching X695 (ports 61, 62)

For more details about the stacking methods that are available for each switch series, see the hardware installation guide for your switch.



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.