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Re: [dnsop] Re: Root Anycast

  • From: Rodney Joffe
  • Date: Tue May 03 19:09:37 2005

Responding to Iljitsch and Booloo's comments only, and recognizing that
somehow or other 6 month old threads on other lists seem to have made their
way onto NANOG...

> 
> ---------- Forwarded message ----------
> Date: Sun, 3 Oct 2004 23:01:42 +0200
> From: Iljitsch van Beijnum <iljitsch@muada.com>
> To: Stephane Bortzmeyer <bortzmeyer@nic.fr>
> Cc: dnsop@lists.uoregon.edu
> Subject: Re: [dnsop] Re: Root Anycast
> 
> On 2-okt-04, at 21:42, Stephane Bortzmeyer wrote:
> 
>> Troll Bot <dean@av8.com> keeps mentioning PPLB. May be some people
>> more knowledgeable about BGP than I am will explain to me why PPLB is
>> such a new issue for anycasting?
> 

<snip>

> 
> Now the part that worries me is what's happening in .org. They only use
> two addresses in the delegation from the root, and both are heavily
> anycasted. This makes no sense at all as it effectively hides all but
> two of the .org TLD servers while there are no reasons at all for not
> making at least have a dozen others visible.

In October of 2004 this was the case. It has not been the case since early
this year;

$ dig @c.root-servers.net org. ns

; <<>> DiG 9.2.2 <<>> @c.root-servers.net org. ns
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 40125
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 6

;; QUESTION SECTION:
;org.                           IN      NS

;; AUTHORITY SECTION:
org.                    172800  IN      NS      TLD1.ULTRADNS.NET.
org.                    172800  IN      NS      TLD2.ULTRADNS.NET.
org.                    172800  IN      NS      TLD3.ULTRADNS.org.
org.                    172800  IN      NS      TLD4.ULTRADNS.org.
org.                    172800  IN      NS      TLD5.ULTRADNS.INFO.
org.                    172800  IN      NS      TLD6.ULTRADNS.CO.UK.

;; ADDITIONAL SECTION:
TLD1.ULTRADNS.NET.      172800  IN      A       204.74.112.1
TLD2.ULTRADNS.NET.      172800  IN      A       204.74.113.1
TLD3.ULTRADNS.org.      172800  IN      A       199.7.66.1
TLD4.ULTRADNS.org.      172800  IN      A       199.7.67.1
TLD5.ULTRADNS.INFO.     172800  IN      A       192.100.59.11
TLD6.ULTRADNS.CO.UK.    172800  IN      A       198.133.199.11

;; Query time: 54 msec
;; SERVER: 192.33.4.12#53(c.root-servers.net)
;; WHEN: Tue May  3 15:59:03 2005
;; MSG SIZE  rcvd: 279

The IPv6 instances are awaiting resolution of some technical issues with the
root, but we expect that in the next couple of weeks, tld1.ultradns.net and
tld4.ultradns.org will also have AAAA records. Also anycast.

We're currently doing some lab work to make sure we fully understand the
effects of adding IPv6 records, plus glue, in terms of exceeding udp packet
sizes. But that is grist for another mill, so to speak.

See y'all in Seattle. Daniel Karrenberg and others will be providing loads
of fuel to spark debate amongst non-kooks about the efficacy of anycast DNS
;-)

Rodney Joffe
CenterGate Research Group, LLC
http://www.centergate.com
"Technology so advanced, even WE don't understand it"(R)