Re: Advisory — D-root is changing its IPv4 address on the 3rd of January.

Jay Ashworth jra at
Fri Dec 14 19:25:43 UTC 2012

----- Original Message -----
> From: "Joe Abley" <jabley at>

> >> Quite so: UMD: Where will the old IP route after the 6 month period
> >> is complete? Somewhere safe?

> As I understand it (but ask UMD!)
> - D-Root is currently numbered out of a general-purpose UMD /16 into a
> dedicated, specifically-assigned /24
> - the UMD /16 is not going anywhere
> The announcement is that D-Root is being renumbered, not that UMD is
> renumbering its whole network.

So, in short, UMD will still own the losing allocation, and be able to make 
relatively sure nothing else is placed at that IP (though of course they 
won't necessarily be able to make sure no one hijacks that entire prefix --
does Renesys have a pay-special-attention list?)

-- jra
Jay R. Ashworth                  Baylink                       jra at
Designer                     The Things I Think                       RFC 2100
Ashworth & Associates         2000 Land Rover DII
St Petersburg FL USA               #natog                      +1 727 647 1274

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