past two weeks, users have complained of slow internet connection. Nothing was changed or added to network. I've checked the ISP service by using laptop directly to fiber/ethernet port and no issues. we get the error for all websites as attached. But if users wait at-least a minute, the site will load. switches have spanning tree enabled and have not found any loops. any suggestions? I've installed Wireshark and notice quite a bit of broadcast, but from what I've read from google, sounds like broadcasts are normal. any suggestions would be greatly appreciated.