North American Network Operators Group

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Re: BGP filtering of supernets out of classful space

  • From: Randy Bush
  • Date: Fri May 19 23:50:16 2000

> A provider in China has been assigned addresses in the
> traditional class C space.  APNIC's assignment is a /16 for this allocation.
> Said provider, trying to be good Internet citizens are announcing
> only aggregates of /16.
> 
> However, they're running into several providers that are filtering
> the announcements because they aren't /24.

i can only imagine that these providers are confused by one vendor's
(recently fixed) rather baroque filter rule syntax.

randy