Administrator Guide

No power
Interface index is 2103813
Internet address is not set
Mode of IPv4 Address Assignment : NONE
DHCP Client-ID :3417ebf225c6
MTU 1554 bytes, IP MTU 1500 bytes
LineSpeed 40000 Mbit
<output truncated for brevity>
Splitting QSFP Ports to SFP+ Ports
The switch supports splitting a single 40G QSFP port into four 10G SFP+ ports using a supported breakout cable. (For the link to a list of
supported cables, refer to the
C9000 Installation Guide or the C9000 Release Notes).
To split a single 40G port into four 10G ports, use the following command.
• Split a single 40G port into 4-10G ports.
CONFIGURATION mode
linecard {0–11} port {0–20} portmode quad
• The range of switch line-card numbers is 0 to 11.
• The range of port numbers on a 40G port to be split is 0 to 20.
To verify port splitting, use the show system linecard {0–11} fanout {count | configure} command.
• The quad port must be in a default conguration before you can split it into 4x10G ports. The 40G port is lost in the conguration when
the port is split; be sure that the port is also removed from other L2/L3 feature congurations.
Converting a QSFP or QSFP+ Port to an SFP or SFP+ Port
You can convert a QSFP or QSFP+ port to an SFP or SFP+ port using the Quad to Small Form Factor Pluggable Adapter (QSA).
QSA provides smooth connectivity between devices that use Quad Lane Ports (such as the 40 Gigabit Ethernet adapters) and 10 Gigabit
hardware that uses SFP+ based cabling. Using this adapter, you can eectively use a QSFP or QSFP+ module to connect to a lower-end
switch or server that uses an SFP or SFP+ based module.
When connected to a QSFP or QSFP+ port on a 40 Gigabit adapter, QSA acts as an interface for the SFP or SFP+ cables. This interface
enables you to directly plug in an SFP or SFP+ cable originating at a 10 Gigabit Ethernet port on a switch or server.
You can use QSFP optical cables (without a QSA) to split a 40 Gigabit port on a switch or a server into four 10 Gigabit ports. To split the
ports, enable the fan-out mode.
Similarly, you can enable the fan-out mode to congure the QSFP port on a device to act as an SFP or SFP+ port. As the QSA enables a
QSFP or QSFP+ port to be used as an SFP or SFP+ port, Dell Networking OS does not immediately detect the QSA after you insert it into
a QSFP port cage.
After you insert an SFP or SFP+ cable into a QSA connected to a 40 Gigabit port, Dell Networking OS assumes that all the four fanned-out
10 Gigabit ports have plugged-in SFP or SFP+ optical cables. However, the link UP event happens only for the rst 10 Gigabit port and you
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.
Interfaces 461