Supermicro SSE-X3348T, Руководство по установке

Страница: 58 / 74

SSE-X3348T/ SSE-X3348TR Switch Installation Manual
5-8
5-5 How to Connect to QSFP+ Fiber Optic Ports
The switch includes four slots for 40-Gigabit Ethernet QSFP+ fiber-optic transceivers.
Note that 40G fiber optic ports can provide either one 40-Gbps full-duplex link, four
independent 10G fiber optic links. Connecting a 40G QSFP+ port to four 10G SFP+
ports requires the use of a breakout cable.
NOTE: The length of fiber optic cable for a single switched link should not exceed the
relevant standards specified in this section. However, power budget constraints should also
be considered when calculating the maximum fiber optic cable length for a particular link.
Connection Procedure
Follow these steps to connect cables to QSFP+ transceiver ports.
WARNING: This switch uses lasers to transmit signals over fiber optic cable. The lasers are
compliant with the requirements of a Class 1 Laser Product and are inherently eye safe in
normal operation. However, you should never look directly at a transmit port when it is
powered on.
WARNING: When selecting a fiber QSFP+ device, considering safety, please make sure
that it can function at a temperature that is not less than the recommended maximum
operational temperature of the product. You must also use an approved Laser Class 1
QSFP+ transceiver.
Connecting Cables to SFP/SFP+ Transceiver Ports
1. Remove and keep the port’s protective cover. When not connected to a fiber cable,
the cover should be replaced to protect the optics.
2. Check that the fiber terminators are clean. You can clean the cable plugs by wiping
them gently with a clean tissue or cotton ball moistened with a little ethanol. Dirty
fiber terminators on fiber cables will impair the quality of the light transmitted through
the cable and lead to degraded performance on the port.
3. Connect one end of the cable to the QSFP+ port on the switch and the other end to
the QSFP+ port on the other device. Since QSFP+ connectors are keyed, the cable
can only be attached in the correct orientation.
Table 5-5. Maximum 40 Gigabit Ethernet Fiber Cable Lengths
Fiber Size Fiber Bandwidth
Maximum Cable
Length
Connector
40GBASE-SR4
62.5/125 micron multimode 160 MHz/km 2-26 m (7-85 ft.) LC
62.5/125 micron multimode 200 MHz/km 2-33 m (7-108 ft.) LC
50/125 micron multimode 400 MHz/km 2-66 m (7-216 ft.) LC
50/125 micron multimode 500 MHz/km 2-82 m (7-269 ft.) LC