Administrator Guide

• SR4
• LM4
• PSM4
• PSM4-LR
If you use any of the transceivers in the preceding list that is not Dell-qualied, Dell Networking OS places the interface in error-disabled
(operationally down) state. The system displays a syslog message similar to the following:
Apr 29 05:09:16: %S4048-ON:1 %IFAGT-2-TRANSCEIVER_UNSUPPORTED_ERROR: Transceiver in slot 1 port
50 unrecognized, putting interface in operational-down state
The following command output displays that the interface is in error-disabled state:
Dell#show interfaces fortyGigE 1/50
fortyGigE 1/50 is up, line protocol is down(error-disabled[Transceiver Unsupported])
Hardware is DellEth, 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>
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.
Interfaces
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