Table 59: 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
X770 (ports 103,104)
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)
X770 (ports 103 and 104)
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)
X770-32q (ports 101 and 103, and 102 and
104)
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)
2
Combined over paired ports
Building Stacks
ExtremeSwitching and Summit Switches: Hardware Installation Guide 145
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