[outages] Fiber cut in northeast Minnesota on Tuesday, August 3

[Jonathan Lassoff]

I'm not sure if this is related or not, but I was definitely seeing
loss from SFO <-> STL over St. Louis this morning (~8am - 11am PDT),
and various folks were reporting issues with Level3.

I've seen similar Level3 failures in the past, and they all seem to
exhibit the same behavior:
 - Traffic to x.x.x.1 is fine
 - Traffic to x.x.x.2 is fine
 - Traffic to x.x.x.3 shows 100% loss
 - Traffic to x.x.x.4 is fine

It's as if there's a link aggregation that's hashing by IP, and one
one of the links stops forwarding, but doesn't go down.
Just a wild guess.