Configuring Wavelength For 10-Gigabit Sfp+ Optics - Dell C9000 Series Networking Configuration Manual

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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

You can use the QSA on any of the ports. However, the existing maximum fan-out restrictions apply to

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.

Configuring wavelength for 10–Gigabit

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

Troubleshooting