From mark.tinka@seacom.mu Mon Jan 25 19:56:46 2016
> It is but nobody worries about that, we trust route servers at IX
> carrying way more traffic than most of these access circuits.
Yes, but if those go belly-up, you have another exchange point to fall
back to, a bi-lateral peering session, or an upstream provider. Or all
three.
Doesn't matter, if traffic is blackholed at an ix then it
won't be failing over to another one. Same effect
A "critical" device falling over in my network is far worse prospect to
experience.
The general case doesn't care about your network, it assumes you'd
engineer that appropriately for the criticality and do something
different/better if you need to.
brandon
Actually, where I have mostly seen the biggest problems with the Cogent remote BGP
hacks is when their forwarding decisions in between your router and their BGP
speaking router don’t actually deliver your packets to the BGP speaking router
and your traffic starts veering wildly off course to god knows where.
Likely they’ve gotten better at avoiding this over the years, but there were times
when it resulted in very interesting loops and very strange paths that often
did not ever reach the intended destination.
Worse, when you encountered one of these hairballs, finding someone at AS174 with
enough clue to understand your traceroutes let alone fix anything was an additional
challenge.
Owen
Doesn't matter, if traffic is blackholed at an ix then it
won't be failing over to another one. Same effect
Route servers do not participating in the forwarding plane. If they
fail, you lose routes from that exchange point which show up elsewhere.
If peers are originating routes at exchange points and lose their
backhauls, that's another set of problems your NOC can fix.
If the exchange point switch runs out of ideas, that's another set of
problems your NOC can fix.
The general case doesn't care about your network, it assumes you'd
engineer that appropriately for the criticality and do something
different/better if you need to.
Big assumption to make.
Mark.