Setup Guide

113 Dell EMC PowerEdge MX SmartFabric Configuration and Troubleshooting Guide
A.10 QSFP28 double density connectors
Quad Small Form-Factor Pluggable 28 Double Density, or QSFP28-DD connectors, expand on the QSFP28
pluggable form factor. By doubling the number of available lanes from four to eight, with each lane operating
at 25 Gbps, the result is 200 Gbps for each connection.
NOTE: A QSFP28-DD transceiver is not compatible with a QSFP28 port due to the specifications required to
lengthen the PCB connector to allow for the additional four lanes. However, a QSFP28 transceiver can be
inserted into a QSFP28-DD port.
QSFP28-DD and QSFP28 physical interfaces
The MX9116n FSE supports direct attach cables (DAC), active optic cables (AOC), as well as multi-mode
fiber (MMF) cables with supported Dell EMC Networking optics.
A.11 OOB management network
Figure 106 shows a Dell EMC PowerSwitch S3048-ON used as an OOB management switch. Management
ports from the leaf switches and the MX9002 modules connect to the S3048-ON as shown. Management
ports on other equipment in the rack (not shown), such as PowerEdge server iDRACs, are also connected to
the S3048-ON. Not shown is the S3048-ON connecting to the management network core.
NOTE: Shown for the leaf switch layer is a pair of Dell EMC PowerSwitch Z9100-ON switches. If using Cisco
Nexus switches, management network configuration is identical.
For the S3048-ON management switch, all ports used are in Layer 2 mode and are in the default VLAN.
Spanning Tree Protocol (STP) is enabled as a precaution against loops. Additional configuration is not
required.