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michael.dillon at bt.com michael.dillon at bt.com
Fri Jun 1 08:09:47 UTC 2007

> > When you have a large company, the company is also split 
> over several 
> > administrative sites, in some cases you might have a single 
> > administrative group covering several sites though, this 
> allows you to 
> > provide them with a single /48 as they are one group they will know 
> > how to properly divide that address space up.
> Works great, until you realize that for traffic engineering 
> purposes, you really want to announce your Los Angeles site 
> at an exchange near there, and your London site to be 
> announced near there, and you end up wondering whether 
> deaggregating the /48, or getting a second/third /48 would be 
> wiser.. ;)

I believe that a separate /48 per site is better regardless of whether
or not the company has contracted with a single ISP for all sites, or
not. As far as I am concerned if there is a separate access circuit,
then it is a site and it deserves its own /48 assignment/allocation.

--Michael Dillon

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