Reference Guide

79 Dell EMC PowerEdge MX SmartFabric Deployment Guide
Root Bridge hello time 2, max age 20, forward delay 15
Bridge ID Priority 32768, Address 2004.0f00.cd1e
Configured hello time 2, max age 20, forward delay 15
Flush Interval 200 centi-sec, Flush Invocations 95
Flush Indication threshold 0 (MAC flush optimization is disabled)
A.5 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.