Tonight, 17th May I was alarmed to see all our networks go offline at the exact same time. The networks all have different locations within the UK. They have different ISP's and yet all were reporting offline.
While the dashboard was reporting theses offline, I was able to check our upstream routers and they didn't drop at all. I was also able to login to each site on a VPN with no issues.
What would have caused all our networks to go offline at exactly the same time? Is this something I should be concerned about?
I value any comments and feedback.
Thank you in advance.