Administrator Guide

can use only that port for data transfer. As a result, only the rst fanned-out port is identied 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 congure 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 congurations.
If you use an active optical cable (AOC), you can convert the QSFP+ port to a 10 Gigabit SFP+ port or 1 Gigabit SFP port. Use the speed
command to enable the required speed.
NOTE: You cannot enable 1G speed on any port with auto-negotiation enabled. As a result, when you connect to a device using
SFP, the link does not come up if auto-negotiation is enabled. To use a port in 1G speed, disable auto-negotiation. 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
• Starting from Dell OS 9.7(0.0), as part of dynamic fan-out support, only 96 ports can be split into 10G mode. Remaining eight ports stay
in 40G. For more information, see Splitting 40G Ports without Reload.
• 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 rst 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.
• You can use the QSA on any of the ports.
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 congurations, 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 1/1/1 transceiver
SFP+ 1/1 Serial ID Base Fields
SFP+ 1/1 Id = 0x0d
SFP+ 1/1 Ext Id = 0x00
SFP+ 1/1 Connector = 0x23
SFP+ 1/1 Transceiver Code = 0x08 0x00 0x00 0x00 0x00 0x00 0x00 0x00
SFP+ 1/1 Encoding = 0x00
………………
………………
SFP+ 1/1 Diagnostic Information
===================================
SFP+ 1/1 Rx Power measurement type = OMA
===================================
384
Interfaces