Setup Guide

15 Dell EMC PowerEdge MX SmartFabric Configuration and Troubleshooting Guide
If the FSE is in SmartFabric mode, the attached FEM is automatically configured and virtual ports on the
Fabric Expander and a virtual slot ID are created and mapped to 8x25GbE breakout interfaces in FEM mode
on the Fabric Engine
A FSE in Full Switch mode automatically discovers the FEM when these conditions are met:
• The FEM is connected to the FSE by attaching a cable between the QSFP28-DD ports on both
devices
• The interface for the QSFP28-DD port-group connected to on the FSE is in 8x25GbE FEM mode
• At least one blade server is inserted into the MX7000 chassis containing the FEM
NOTE: If the FSE is in Full Switch mode, you must manually configure the unit ID of the FEM. See the
OS10EE
documentation for implementation.
Once the FSE discovers the FEM, it creates virtual ports by mapping each 8x25GbE FEM breakout interface
in port groups 1 to 10 to a FEM virtual port. Table 3 shows an example of this mapping.
Virtual port mapping
FEM service tag
FSE QSFP28-DD
port group
FSE 25G
interfaces
FEM unit ID
(virtual slot ID)
FEM virtual ports
12AB3456
portgroup1/1/1
1/1/17:1
71
1/71/1
1/1/17:2
1/71/2
1/1/17:3
1/71/3
1/1/17:4
1/71/4
1/1/18:1
1/71/5
1/1/18:2
1/71/6
1/1/18:3
1/71/7
1/1/18:4
1/71/8
When a QSFP28-DD port group is mapped to a FEM, in the
show interface status output, the eight
interfaces display
dormant instead of up until a virtual port starts to transmit server traffic:
OS10# show interface status
--------------------------------------------------------------------------------
Port Description Status Speed Duplex Mode Vlan Tagged-Vlans
--------------------------------------------------------------------------------
...
Eth 1/1/17:1 dormant
Eth 1/1/17:2 dormant
Eth 1/1/17:3 dormant
Eth 1/1/17:4 dormant
Eth 1/1/18:1 dormant
Eth 1/1/18:2 dormant
Eth 1/1/18:3 dormant
Eth 1/1/18:4 dormant
...