Lenovo RackSwitch G8272 Посібник з експлуатації - Сторінка 9

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Transceivers and cables

With the flexibility of the G8272 switch, customers can choose the following connectivity technologies:

For 1 GbE links, customers can use RJ-45 SFP transceivers with UTP cables up to 100 meters.

Customers that need longer distances can use a 1000BASE-SX transceiver, which can drive

distances up to 220 meters with 62.5 µ multimode fiber (OM1) and up to 550 meters with 50 µ

multimode fiber (OM2), or the 1000BASE-LX transceivers that support distances up to 10 kilometers

with single-mode fiber (1310 nm).

For 10 GbE links, customers can use SFP+ direct-attached copper (DAC) cables for in-rack cabling

for distances up to 7 meters or SFP+ active optical cables (AOCs) for distances up to 20 meters.

These cables have SFP+ connectors on each end, and they do not need separate transceivers. For

distances up to 30 meters, the 10GBASE-T SFP+ transceiver can be used with Category 6a or 7

RJ-45 UTP cables.

For longer distances, the 10GBASE-SR transceiver supports distances up to 300 meters over OM3

multimode fiber or up to 400 meters over OM4 multimode fiber. The 10GBASE-LR transceivers can

support distances up to 10 kilometers on single mode fiber. For extended distances, the 10GBASE-

ER transceivers can support distances up to 40 kilometers on single mode fiber.

To increase the number of available 10 GbE ports, customers can split out four 10 GbE ports for

each 40 GbE port by using QSFP+ to 4x SFP+ DAC or active optical breakout cables for distances

up to 5 meters. For distances up to 100 meters, the 40GBASE-iSR4 QSFP+ transceivers can be

used with OM3 optical MPO-to-LC breakout cables or up to 150 meters with OM4 optical MPO-to-

LC breakout cables. For longer distances, the 40GBASE-eSR4 transceivers can be used with OM3

optical MPO-to-LC breakout cables for distances up to 300 meters or OM4 optical MPO-to-LC

breakout cables for distances up to 400 meters.

For 40 GbE to 40 GbE connectivity, customers can use the affordable QSFP+ to QSFP+ DAC

cables for distances up to 7 meters or QSFP+ to QSFP+ active optical cables for distances up to 20

meters. These DAC cables and AOCs have QSFP+ connectors on each end, and they do not need

separate transceivers.

With multimode fiber LC cables, customers can use the 40GBASE QSFP+ bi-directional

transceivers for distances up to 100 meters with OM3 MMF LC cables or up to 150 meters with

OM4 MMF LC cables.

With multimode fiber MPO cables, customers can use the 40GBASE-SR4/iSR4 QSFP+ transceivers

for distances up to 100 meters with OM3 MMF MPO cables or up to 150 meters with OM4 MMF

MPO cables. For distances up to 300 meters, the 40GBASE-eSR4 QSFP+ transceiver can be used

with OM3 MMF MPO cables or up to 400 meters with OM4 MMF MPO cables.

For distances up to 10 kilometers, the 40GBASE-LR4 QSFP+ transceiver can be used with single

mode fiber LC cables.

Lenovo RackSwitch G8272