Lenovo RackSwitch G8332, Руководство по установке

Страница: 25 / 122

© Copyright Lenovo 2017 Chapter 2: Switch Components
25
Switching Ports
The G8332 contains the following switching ports:
 Twenty ‐ four 40 GbE QSFP+ ports
 Eight additional 40 GbE QSFP+ ports through an optional Media Dependent
Adapter (MDA) module
QSFP+ ports can be populated with optical QSFP+ modules or Direct ‐ Attach Cables
(DACs), including those that allow the port to be used as four 10 GbE SFP+ ports.
SFP+ ports can be populated with optical or copper transceiver modules or DACs.
For a list of compatible transceivers and DACs, see the Lenovo Networking
Catalog .
The switching ports are described in the following sections. For information about
ports on the management panel, see “Management Panel” on page 21 .
QSFP+ Ports
Thirty ‐ two 40 GbE Quad Small Form ‐ factor Pluggable Plus (QSFP+) ports are
located on the front panel (including eight in the optional MDA module).
QSFP+ ports accept supported optical QSFP+ transceivers or passive Direct Attach
Cables (DACs). The supported transceivers interoperate with any 40GBASE ‐ SR4 or
40GBASE ‐ LR4 compliant devices. The 40GBASE ‐ SR4 transceivers support distances
up to 100 meters on OM3 fiber. Transceivers must be purchased separately.
QSFP+ ports allow you to make one 40 GbE connection, or four 10 GbE connections
using a breakout cable, as follows:
 QSFP+ optical transceiver with MTP ‐ to ‐ 4 LC (SFP+) fiber breakout cable. This
option supports only Lenovo 10GBASE ‐ SR SFP+ transceivers. The
40GBASE ‐ SR4 specification (802.3ba ‐ 2010) indicates a higher optical power level
than standard 10GBASE ‐ SR. Lenovo SFP+ SR transceivers can handle the higher
optical power levels. This cable must be purchased separately.
 QSFP+ to four 10 GbE SFP+ breakout DAC. The SFP+ connectors on supported
breakout DACs are labelled A, B, C, and D, which correspond to the first,
second, third, and fourth ports in the port range. This cable must be purchased
separately.