I have a new 3120 that will not display the system information on the System Summary page. After waiting for several minutes it never displays, continues to say Refreshing. The unit is essentially default config with the exception of a nat policy and disable the eth 0/1 interface to remove the wanings in the System Summary area. Public and Switch information is displayed correctly. I have uploaded the 18.03.01.00-E firmware and verified boot code 140400 and restarted, reset to factory and still no system information. All other functions of the unit appear to be working at this point. But I hesitate to take it to production with this issue. The unit part number is 1700600L2.
I finally figured it out. Internet Explorer 9. Cleared temp internet files, Cookies, History, Form data. Left passwords and others unchecked. I work with a lot of Adtran devices and somehow this caused the issues. Easy fix.