I recently added AT&T to my UTM 9. It seems to be just fine for a couple days and then the link goes out. I moved it from one port to another and just saw it as a fluke. Now, less than 1 week later, I get the same thing. The state is up but the link is down.
I connected a guest WIFI router to the AT&T router and it works just fine. So this is definitely a problem with the unit...
It is a Cisco 2921-V/K9 router.
HELP!!!!!
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