[c-nsp] Multihoming

[Jon Lewis]

On Wed, 15 Sep 2010, Voigt, Thomas wrote:

> Hi Rocker,
>
> Rocker Feller wrote:
>
>> I am pretty new to this concept and would appreciate any
>> guidance on how as
>> a customer I can achieve redundacy with autofailover between 2 ISPs.
>
> You need PI space to do this. Because each ISP can only route his own PA spaces plus the PI spaces from his customers.

You don't need PI space to multihome.  At least not in the ARIN region. 
You do generally need at least a /24 if you want any reasonable chance of 
"the internet" accepting your BGP announcement.

----------------------------------------------------------------------
  Jon Lewis, MCP :)           |  I route
  Senior Network Engineer     |  therefore you are
  Atlantic Net                |
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