Chapter 5
| Port Connections
How to Connect to QSFP+ Fiber Optic Ports
– 42 –
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.
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.
Table 8: 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
50/125 micron multimode 2000 MHz/km 2-300 m (7-984 ft.) LC
To Next Page
Loading...
Need help?
General