Deployment Guide

10 Gigabit port and you can use only that port for data transfer. As a result, only the first fanned-out port is identified as the
active 10 Gigabit port with a speed of 10G or 1G depending on whether you insert an SFP+ or SFP cable respectively.
NOTE: Although it is possible to configure the remaining three 10 Gigabit ports, the Link UP event does not occur for these
ports leaving the lanes unusable. Dell Networking OS perceives these ports to be in a Link Down state. You must not try to
use these remaining three 10 Gigabit ports for actual data transfer or for any other related configurations.
NOTE: You can use the QSA adaptor to establish connectivity between a high-density 100 Gigabit platform and a relatively
lower-end 1 Gigabit switch or a server. The QSA acts as an interface between the QSFP28 ports (that support 100 Gigabit
speeds) and SPF optics with a maximum speed of 1 Gigabit per second. Depending on the type of optics you plug into the
QSA connected to a 100 Gigabit port, the system automatically detects the supported speed of the optics and sets the
interface speed accordingly. For example, if you plug in optics that support 40 Gigabit speeds, the speed of the interface is
set to 40G. Similarly, if you plug in optics that support 1G speed, the speed of the interface is set to 1G.
Important Points to Remember
● Before using the QSA to convert a 40 Gigabit Ethernet port to a 10 Gigabit SFP or SFP+ port, enable 40 G to 4*10 fan-out
mode on the device.
● When you insert a QSA into a 40 Gigabit port, you can use only the first 10 Gigabit port in the fan-out mode to plug-in SFP
or SFP+ cables. The remaining three 10 Gigabit ports are perceived to be in Link Down state and are unusable.
● You cannot use QSFP Optical cables on the same port where QSA is used.
● When you remove the QSA module alone from a 40 Gigabit port, without connecting any SFP or SFP+ cables; Dell
Networking OS does not generate any event. However, when you remove a QSA module that has SFP or SFP+ optical
cables plugged in, Dell Networking OS generates an SFP or SFP+ Removed event.
Example Scenarios
Consider the following scenarios:
● QSFP port 0 is connected to a QSA with SFP+ optical cables plugged in.
● QSFP port 4 is connected to a QSA with SFP optical cables plugged in.
● QSFP port 8 in fanned-out mode is plugged in with QSFP optical cables.
● QSFP port 12 in 40 G mode is plugged in with QSFP optical cables.
For these configurations, the following examples show the command output that the show interfaces
tengigbitethernet transceiver, show interfaces tengigbitethernet, and show inventory media
commands displays:
NOTE:
In the following show interfaces tengigbitethernet commands, the ports 1,2, and 3 are inactive and no
physical SFP or SFP+ connection actually exists on these ports. However, Dell Networking OS still perceives these ports as
valid and the output shows that pluggable media (optical cables) is inserted into these ports. This is a software limitation for
this release.
Configuring wavelength for 10–Gigabit SFP+ optics
You can set the wavelength for tunable 10–Gigabit SFP+ optics using the wavelength command. To set the wavelength,
follow these steps:
● Enter the interface mode and set the wavelength.
INTERFACE mode
wavelength 1529.0
The wavelength range is from 1528.3 nm to 1568.77nm.
● Verify configuration changes.
INTERFACE mode
438
Interfaces