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Extreme Networks Technical Brief: SummitStack, Extreme Networks Virtual Chassis Stacking Technology

SummitStack is supported through dedicated stacking

port functionality with speciﬁc stack cables or through

the use of existing 10 Gigabit or 40 Gigabit Ethernet

ports to stack the switches together. The latter option

allows for physical ﬂexibility when stacking needs to be

carried over longer distances than is supported in the

dedicated stacking cables. SummitStack is an Extreme

Networks solution for ﬁxed conﬁguration switches

to provide simpliﬁed yet agile operations for scalable

converged networks and data centers.

Extreme Networks Stacking technology

come in two basic types, SummitStack,

leveraging proprietary cables

and SummitStack-V, leveraging

conventional Ethernet

SummitStack Varieties

Extreme Networks SummitStack is highly versatile.

In addition to high-performance connectivity

with proprietary stacking cables (SummitStack,

SummitStack 128, SummitStack 256 and SummitStack

512), Extreme Networks also increases range and

ﬂexibility by oering stacking with conventional

Ethernet connectors and optics (SummitStack-V,

SummitStack-V80, SummitStack-V160 and

SummitStack-V320). The following table summarizes

the stacking options available on Extreme Networks

stackable switches.

Stacking Type Performance per Link Cable Type & Lengths Supported Switch Types

SummitStack-V - Stacking

using standardized media

interfaces such as XFP,

XENPAK, and SFP+

10Gbits/sec 0.5m – 100m SFP+, XFP,

XENPAK,10GBaseT, LR

Optics, 40km reach*

Summit X450a, X450e,

X440-10G, X460, X480,

X650, X670, X670V

SummitStack - Original

stacking technology with

proprietary stacking cables

10Gbits/sec 20G Stacking Cable 0.5m,

1.5m, 3.0m, 5.0m

Summit X250e, X450e,

X440, X450a, X460,

X480, X650 (except 5m)

SummitStack-V80 - High

Performance stacking

utilizing QSFP+ technology

20Gbits/sec QSFP+ only 0.5-100m Summit X460, X480

SummitStack-V160- High

Performance stacking

utilizing QSFP+ technology

40Gbits/sec QSFP+ only 0.5-100m Summit X480, X650,

X670V

SummitStack-V320- High

Performance stacking

utilizing QSFP+ technology

80Gbits/sec QSFP+ only 0.5-100m Summit X480, X650,

X670V

* Future Availability

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