Tstout21,  The issue you are having sounds like an out of date firmware version on the network card. I would suggest uninstalling OMSA, then reboot and update the network card. Although the firmware update should resolve it, I would suggest we update the driver to current as well. You can fin the driver and firmware here. After you finish the updates, reboot and then go ahead and reinstall OMSA.  Let me know how it goes. 
When I install OpenManage on a PowerEdge T300 with Windows 2012 R2 and it is causing a network warning of "limited" connectivity and connection to the gateway is lost. I have to run a network card "repair" each time for the warning to go away and the network connection restored. Even after a reboot I still have to run the repair. When I uninstall OMSA the network card works just fine. I have tried OMSA version 7.3, 7.4, 7.4.0.2, 8.1. The compatibility matrix on the Dell site seems to show that it should be compatible with 8.1 as well as 7.4 (on a T300 with 2012 R2). Our network card is a Broadcom NetXtreme Gigabit (driver version 17.0.0.3). Has anyone else experienced this issue? Do I need to go back to a legacy version even though the compatibility documentation does not show 2012 R2 as as supported OS?
Problem with OpenManage on a T300 with Windows 2012 R2