shows the switch models that can participate in each stacking method.
Table 77: 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)
2 Combined over paired ports
Available Stacking Methods
Building Stacks
188
ExtremeSwitching Hardware Installation Guide