DSU dell-system-update-1.2.1-16.07.00.x86_64 fail on PE T710

Hi ,
   I just installed the July DSU update on my PowerEdge T710 running RHEL
6.8.  I ran the dsu command and found that it wanted to update the firmware
on my four on-board Broadcom network interface:

[*]13 NetXtreme II BCM5709 Gigabit Ethernet rev 20 (em4)
 Current Version : 7.12.19 Upgrade to : 08.07.25

I selected this update and told dsu to commit.  It failed with the following
error message:

Enter your choice : c
Installing Network_Firmware_WR5R5_LN_08.07.25_A00-00...
Collecting inventory...
./qldup_inv: error while loading shared libraries: libvmkmgmt.so: cannot
open shared object file: No such file or directory

Inventory collection failed.
Network_Firmware_WR5R5_LN_08.07.25_A00-00 could not be installed

A find on the system did not locate a  libvmkmgmt.so file.  The same version
of DSU ran fine on my PowerEdge T320 running the same version of RHEL.  

Any clues on what I need to do to get my update installed?

Thanks,
Charley Knox
Associate Astronomer
Dept. of Astronomy
Case Western Reserve University