North American Network Operators Group
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Re: Splitting ARIN assignment

  • From: Joe Maimon
  • Date: Thu May 22 14:45:52 2008


Yamasaki, Charles wrote:
Make sure that your two location is inter-connected directly, 

Why is this required?  If you put static routes to point the remote /21 to
the upstream provider on each side wouldn't that take care of the origin AS
loop?

Origin AS is easily handled by the allow-as-in neighbor command and better replaced with more flexible as-path and prefix-lists in route-maps.

The interconnection is required to be able to advertise the entire space as a "covering" prefix at both sites.

Doing that without interconnectivity and using your static route idea would generate routing loops.