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  • From: Mike Smith
  • Date: Wed Jun 27 12:28:26 2001


I have a customer that would like to setup two
different in the US and one in the UK. 
These sites will be mutually exclusive so that they
won't be load balancing between the two, the custom
app that they will be running on the web servers will
direct UK customers to the UK and US customers to the
US.  However they would like the US site to be a
backup site for the UK.  So that if there are any
problems, the UK traffic will be routed to the US via

My question is this.  Can a company use the same AS
globally and announce the same addresses out both
Europe and the US if the ASN and NetBlocks were
allocated from ARIN?  They want to be able to take the
addresses that they are announcing in their UK
location, and announce them out of the US(in case of a
disaster, for example), so that their UK customers can
still get to a limited version of their site.  Are
there any problems with using ARIN allocated IP
addresses anywhere in the world?

I know this works technically, I'm just curious if any
of the ISPs out there are filtering to keep European
traffic limited to RIPE allocated IP addresses.  And
are there any problems of doing the same thing in

Mike Smith

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