On a regular basis, MAE West has failures that cause only some of the
other routers to become unreachable. I believe all of the instances
that I have heard of are related to problems with the Netedges which
show up mostly under high load. I've heard various people call it
the "Sleeping Interface" problem. It usually goes away when you
reset the netedges, but under heavy load it can come back quickly.
We have seen it extensively, when our 10mb connection became heavily
loaded. Just yesterday, we upgraded to a DS3, so were hoping
not to see it for a while. I know AGIS has also had this problem
and I believe Best has seen it as well. Maybe you haven't seen
it because you have a colocated router at MAE-WEST.
Rob