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

bmanning at vacation.karoshi.com bmanning at vacation.karoshi.com
Fri Dec 14 21:25:16 UTC 2012


On Fri, Dec 14, 2012 at 03:10:44PM -0600, Joe Antkowiak wrote:
> On Fri, Dec 14, 2012 at 2:13 PM, Jason Castonguay <castongj at umd.edu> wrote:
> 
> > The old address, which is in the middle of UMD's network, is going to be
> > black-holed once the change is over. Nothing will be on that IP once we
> > move the root off.  The rest of UMD's network is staying put.  This move
> > is part of UMD's commitment to improve the service, so we can support
> > DNS anycast.
> >
> >
> Just a quick question....if the old block is going to be black-holed but
> kept allocated...why does it need to be changed in the first place, or why
> does the existing have to be disabled?  (just have both addresses
> active/responding?)
> 
> Forgive me if I'm missing something.

	because you would not accept a /30 cutout of the UMD /16 coming
	from some random IX in Singapore.  (see Joe Ableys post earlier today
	on why legacy nodes are / have renumbered.)

/bill



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