Filter
Top Products
NOTE: Trident2 chip sets do not work at 1G speeds with auto-negotiation enabled. As a result,
when you peer any device using SFP, the link does not come up if auto-negotiation is enabled.
Therefore, you must disable auto-negotiation on platforms that currently use Trident2 chip sets
(S6000 and Z9000). This limitation applies only when you convert QSFP to SFP using the QSA. This
constraint does not apply for QSFP to SFP+ conversions using the QSA.
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
Interfaces
427