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North American Network Operators Group

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Re: ISP network design of non-authoritative caches

  • From: Joel Baker
  • Date: Sun Nov 18 14:53:43 2001

On Sun, Nov 18, 2001 at 10:19:22AM -0000, Alex Bligh wrote:
> 
> 
> 
> --On Saturday, 17 November, 2001 4:48 AM -0500 Sean Donelan 
> <sean@donelan.com> wrote:
> 
> > We know this isn't good engineering practice, because another national
> > ISP with millions of subscribers configured their network the same way,
> > and experienced a multi-hour service disruption affecting most of their
> > users a couple of years ago when an error blocked access to their two
> > caching-only, name servers.
> 
> You mean there are national ISPs out there, who have exactly 2
> caching nameservers, as opposed to configure their clients with
> 2 IP addresses (perhaps always the same 2) which perform name
> resolution? Wow. Is this some sort of retro fashion?

Yes, there are.

No, it's not fashion. Though it's about as foolish.

Names avoided to prevent NDA lawsuits. You can fill in the blanks.
-- 
***************************************************************************
Joel Baker                           System Administrator - lightbearer.com
lucifer@lightbearer.com              http://users.lightbearer.com/lucifer/




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