North American Network Operators Group

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Re: Natural class B address

  • From: Sean M. Doran
  • Date: Fri Aug 17 05:31:54 2001

Sae writes:

| Have question about filtering policy on the natural class B address block.
| Trying to use /21 or shorter for various places including international,
| from the natural class B block, we have now.   Do you see any problem on
| announcing as  /21  to the Internet?

Yes.  Give it back.  Renumber into best-fit CIDR blocks from
your provider(s) and/or IRR(s).  

Be a good citizen of the global routing tables, or be filtered.