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[AfriNIC-rpd] AFPUB-2006-GEN-001 and Anycast

Graham Beneke graham at
Wed Apr 11 06:34:06 UTC 2012

On 07/04/2012 10:34, Alan Barrett wrote:
> What's wrong with the obvious approach? Like this:
> 1. get a /18 block.
> 2. carve out a /24 from inside the /18.
> 3. announce the /18 to everybody.
> 4. announce the /24 to only some peers.
> Not so obvious:
> 5. optionally, tag the /24 with a special community to encourage your
> peers not to propagate the announcement further. Perhaps no-export
> would be a reasonable choice.

There is a specific requirement that the prefix does not appear in the 
routing table of certain peers and is un-routable from their 
perspective. Thus it can not appear as part of an aggregate either.

You can read the details in this GSMA document:

While I understand that their could be other ways to achieve the 
objectives, a global body has already standardised this across many of 
our members. Is it not wise to build policies that adequately provide 
for these requirements?

Graham Beneke

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