Concept Guide

The following command output displays that the interface is in error-disabled state:
DellEMC#show interfaces fortyGigE 1/50
fortyGigE 1/50 is up, line protocol is down(error-disabled[Transceiver Unsupported])
Hardware is DellEMCEth, address is 34:17:eb:f2:25:c6
Current address is 34:17:eb:f2:25:c6
Non-qualified pluggable media present, QSFP type is 40GBASE-SR4
Wavelength is 850nm
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>
For information about which optics and transceivers are supported, contact your Dell representative.
Splitting QSFP Ports to SFP+ Ports
The platform supports splitting a single 40G QSFP port into four 10G SFP+ ports using one of the supported breakout cables (for a list of
supported cables, refer to the Installation Guide or the Release Notes).
NOTE: When you split a 40G port (such as fo 1/4) into four 10G ports, the 40G interface conguration is still available in the
startup conguration when you save the running conguration by using the write memory command. When a reload of the
system occurs, the 40G interface conguration is not applicable because the 40G ports are split into four 10G ports after the
reload operation. While the reload is in progress, you might see error messages when the conguration le is being loaded. You
can ignore these error messages. Similarly, such error messages are displayed during a reload after you congure the four
individual 10G ports to be stacked as a single 40G port.
To split a single 40G port into four 10G ports, use the following command.
• Split a single 40G port into four 10G ports.
CONFIGURATION mode
stack-unit stack-unit-number port number portmode quad
– number: enter the port number of the 40G port to be split.
NOTE
: To revert the port mode to 40G, use the no stack-unit stack-unit-number port port-number portmode
quad command.
Important Points to Remember
• Splitting a 40G port into four 10G ports is supported on standalone and stacked units.
• You cannot use split ports as stack-link to stack a system.
To verify port splitting, use the show system stack-unit stack-unit-number fanout {count | configure} command.
To verify port splitting, use the show system stack-unit stack—unit—number 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.
• The system must be reloaded after issuing the CLI for the change to take eect.
Interfaces
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