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

ExtremeSwitching X670-G2

ExtremeSwitching 5520 (using 5520-VIM-4X)
Note: The 5520 switches can stack with the 5320 switches and 5420 switches by installing a 5520-VIM-4X into the 5520 switches.
SummitStack-V40 10 Gbps 0.5 m - 40 m

SFP+ (with SR and LR)

ExtremeSwitching 5320 (ports U1, U2)
Note: The 5320 switches can stack with themselves, the 5420, or 5520 switches using 5520-VIM-4X ports.
ExtremeSwitching 5420 (ports U1, U2)
Note: The 5420 switches can stack with themselves, the 5320 switches, or 5520 switches using 5520-VIM-4X ports.
SummitStack-V80 20 Gbps 0.5 m - 5 m SFP-DD ExtremeSwitching 5420 (ports U1, U2)
Note: The 5420 switches can stack with themselves and ExtremeSwitching 5520 (ports U1 and U2) when configured for SummitStack-V80.
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 X670-G2-48x-4q (ports 57, 61)

* ExtremeSwitching X590 (ports 29, 33)

* ExtremeSwitching X690 (ports 61, 69)

* ExtremeSwitching X465 (ports S1 and S2)

* ExtremeSwitching X695 (ports 61, 62)

Note: * The X465, X590, X690, and X695 can stack with each other, but not with other V160-capable switches.
ExtremeSwitching 5520 (ports U1, U2)
Note: If you use SummitStack-V160, 5520 switches can stack only with themselves. To stack with 5320 and 5420 switches, the 5520 can use either SummitStack-V80 on ports U1 and U2 or SummitStack-V on the alternate stack ports (Using a 5520-VIM-4X).
SummitStack-V200 50 Gbps 0.5 m - 100 m

QSFP28 only

ExtremeSwitching 5520 (ports U1, U2)
Note: If you use SummitStack-V200, 5520 switches can stack only with themselves.
SummitStack-V320 80 Gbps 0.5 m - 100 m

QSFP+ only

ExtremeSwitching X670-G2-48x-4q (ports 49, 53, 57, 61)

SummitStack-V400 106 Gbps 0.5 m - 100 m

QSFP28 only

ExtremeSwitching X590 (ports 29,33)

ExtremeSwitching X690 (ports 61,69)

ExtremeSwitching X870 (ports 121,125)

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 X690 (ports 61,69)

ExtremeSwitching X870 (ports 121,125)

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.

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