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Re: Enterprise Multihoming

  • From: Pekka Savola
  • Date: Thu Mar 11 12:36:31 2004

<On Thu, 11 Mar 2004, Gregory Taylor wrote:
> Mutli-homing a non-ISP network or system on multiple carriers is a good 
> way to maintain independent links to the internet by means of different 
> peering, uplinks, over-all routing and reliability.  My network on NAIS 
> is currently multi-homed through AT&T.  I use a single provider as both 
> of my redundant links via 100% Fiber network.  Even though this is 
> cheaper for me, all it takes is for AT&T to have some major outage and I 
> will be screwed.  If I have a backup fiber line from say, Global 
> Crossing, then it doesn't matter if AT&T takes a nose dive, I still have 
> my redundancy there.

Well, I think this, in many cases, boils down to being able to pick 
the right provider.

I mean, some providers go belly-up from time to time.  Others are 
designed/run better.

For a major provider, complete outage of all of its customers is such 
a big thing they'll want to avoid it always.  If it happens, for a 
brief moment, once in five years (for example), for most companies 
that's an acceptable level of risk.

Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings

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