Users Guide

Table Of Contents
16 Dell EMC PowerEdge MX SmartFabric Configuration and Troubleshooting Guide
Virtual port mapping
FEM service tag
FSE QSFP28-DD
port group
FEM virtual ports
12AB3456
portgroup1/1/1
1/71/1
1/71/2
1/71/3
1/71/4
1/71/5
1/71/6
1/71/7
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
...
You can also use the show interface command to display the Fabric Engine physical port-to-Fabric
Expander virtual port mapping, and the operational status of the line:
OS10# show interface ethernet 1/1/30:3
Ethernet 1/1/30:3 is up, line protocol is dormant
Interface is mapped to ethernet1/77/7
Note: If you move a FEM by cabling it to a different QSFP28-DD port on the Fabric Engine, all software
configurations on virtual ports are maintained. Only the QSFP28-DD breakout interfaces that map to the virtual
ports change.
2.5 Virtual Link Trunking
Virtual Link Trunking (VLT) aggregates two identical physical switches to form a single logical extended
switch. However, each of the VLT peers has its own control and data planes and can be configured
individually for port, protocol, and management behaviors. Though the dual physical units act as a single