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[AfriNIC-rpd] Draft Policy: Anycast Assignments in the AfriNIC region

McTim dogwallah at
Wed Apr 18 10:50:44 UTC 2012

On Wed, Apr 18, 2012 at 6:32 AM, Walubengo J <jwalu at> wrote:

> McTim,
> I still dont understand the problem...u say current minimum allocation
> from AfriNIC is a /22 while typically anycast service prodivers want to
> only use a /24?  What is wrong with getting the /22 and using the /24
> portion or better still the full /22?

Well, typically Anycast uses one address, but routes the entire /24.  If an
Anycast service provider got a /22 and only used 4 addresses, that would
mean 1020 go unused, but all /24's are routed. It's more wasteful than
letting them "waste" 254 IPs.

> The other challenge you cite is underutilization  - when the service
> provider attempts to get more space? But then why cant the service provider
> not utilize the full /22 block for anycast services?

See above.

>   Am thinking /22 gives you 2^10 (1,024 hosts) while /24 gives u 2^8 (256
> hosts) - am not understanding what would stop the anycast service provider
> from making full use of the 1,024 hosts.



"A name indicates what we seek. An address indicates where it is. A route
indicates how we get there."  Jon Postel
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