North American Network Operators Group
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Re: .ORG problems this evening

  • From: Stephen J. Wilcox
  • Date: Thu Sep 18 13:44:31 2003 
On Thu, 18 Sep 2003, Todd Vierling wrote:

> 
> On Thu, 18 Sep 2003, E.B. Dreger wrote:
> 
> : TV> Date: Thu, 18 Sep 2003 10:05:15 -0400 (EDT)
> : TV> From: Todd Vierling
> :
> : TV> DNS site A goes down, but its BGP advertisements are still in
> : TV> effect.
> :
> : Or are they?
> 
> I couldn't know for sure from some sites, but traceroutes sure got there.
> That would imply that (at their end) the advertisements were still up.
> 
> BGP has no way to know that an internal network problem occurred.  If
> someone mistakenly tripped over a network cable that disconnected DNS
> clusters from a router, how would the router know to drop anycast
> advertisements?
> 
> (Sure, you could run zebra on the cluster.  But what about if the name
> server SEGVs?  There's a lot of possible scenarios....)

ALmost there.. just make sure your zebra IGPs are redistributing to your BGP so 
that a failure such as that knocks out the bgp too

Steve