Administrator Guide

Table Of Contents
Important Points to Remember
Before using the QSA to convert a 40 Gigabit Ethernet port to a 10 Gigabit SFP or SFP+ port, you must 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 in a QSA setup.
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 a SFP or SFP+ Removed event.
The QSA module does not have a designated EEPROM. To recognize a QSA, Dell Networking OS reads the EEPROM
corresponding to a SFP+ or SFP module that is plugged into QSA. The access location of this EEPROM is different from the
EEPROM location of the QSFP+ module.
The diagnostics application is capable of detecting insertion or removal of both the QSA as well as the SFP+ or SFP
optical cables plugged into the QSA. In addition, the diagnostic application is also capable of reading the DDS and Vendor
information from the EEPROM corresponding to SFP+ or SFP optical cables. As a result, no separate detection of QSA is
required.
Support for LM4 Optics
The newly supported LM4 optics are similar in behavior to the LR4 optics that are already supported. However, in the output of
show inventory media command, an LM4 optical module is denoted as 40G-LM4. Barring this exception, the functionality
and behavior of LM4 optics is similar to LR4 optics.
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:
Dell#show interfaces tengigabitethernet 0/0 transceiver
SFP+ 0 Serial ID Base Fields
SFP+ 0 Id = 0x0d
SFP+ 0 Ext Id = 0x00
SFP+ 0 Connector = 0x23
SFP+ 0 Transceiver Code = 0x08 0x00 0x00 0x00 0x00 0x00 0x00 0x00
SFP+ 0 Encoding = 0x00
………………
………………
SFP+ 0 Diagnostic Information
===================================
SFP+ 0 Rx Power measurement type = OMA
===================================
SFP+ 0 Temp High Alarm threshold = 0.000C
SFP+ 0 Voltage High Alarm threshold = 0.000V
SFP+ 0 Bias High Alarm threshold = 0.000mA
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
Interfaces 283