Lenovo RackSwitch G8272 Installation Manual page 20

QSFP+ Ports
20
RackSwitch G8272 Installation Guide
CAUTION:
Data processing environments can contain equipment transmitting on system
links with laser modules that operate at greater than Class 1 power levels. For
this reason, never look into the end of an optical fiber cable or open
receptacle. (C027)
Forty-eight 10 GbE SFP+ ports are located on the front panel. These ports accept
supported optical or copper SFP or SFP+ transceivers, or DACs. Transceivers must
be purchased separately.
SFP+ LEDs
Status LEDs for the SFP+ ports are described in the following table.
Table 2. SFP+ LEDs status
Steady green Flashing Green
Link up Activity
Six 40 GbE Quad Small Form-factor Pluggable Plus (QSFP+) ports are located on
the front panel. These ports accept supported optical QSFP+ transceivers or direct
attach cables (DACs). The supported transceivers interoperate with any
40GBASE-SR4 compliant device, and 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 10GBASE-SR SFP+ transceivers. The 40GBASE-SR4
specification (802.3ba-2010) indicates a higher optical power level than standard
10GBASE-SR. SFP+ SR transceivers can handle the higher optical power
levels.
• 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.
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