Internet Week 2006 - DNS Day - AS112 Report

Aug 17, 20151 like501 views

This document provides a summary of AS112 activities and reports. It discusses the AS112 project, which provides DNS services for private address spaces. It notes that AS112 sees around 30% dynamic DNS updates, 48% SOA queries, and 21% PTR queries. It also discusses OCN's involvement as a participant in AS112 and operator of DNS servers for the project. The document provides statistics on query types and links to relevant Internet-Drafts and information sources.

Internet Week 2006 (DNS DAY)
NTT Communications OCN
/ yosimura@ocn.ad.jp
2006/12/06

!? AS112 report
1.? AS112
2.?
3.? OCN AS112
4.?

1-1. AS112
!?
!? 10.0.0.1 168.192.in-addr.arpa
SOA
!? NXDOMAIN
!? 48 (AS112
Project)
!?

1-2.
!? AS112( DNS) …
!?
!? blackhole-{1,2}.iana.org
!? prisoner.iana.org
!? …
!? NS
!? SOA
!? AS112
(2) 10.0.0.1
(3) NS
10.in-addr.arpa. IN NS blackhole-1.iana.org.
10.in-addr.arpa. IN NS blackhole-2.iana.org.
DNS
(1) 10.0.0.1
AS112
(5) NXDOMAIN
10.in-addr.arpa. IN NS blackhole-1.iana.org.
10.in-addr.arpa. IN NS blackhole-2.iana.org.
10.in-addr.arpa IN SOA prisoner.iana.org.
(4)AS112
# dig @blackhole-1.iana.org hostname.as112.net txt
hostname.as112.net. 15 IN TXT "OCN, NTT Communications" "Tokyo, Japan"

1-3.
!?
!?
!?
!? NANOG26 Duane Wessels(CAIDA)
!? F 90%
!? 1.6%

!? 10.in-addr.arpa
$ORIGIN .
$TTL 604800 ; 1 week
10.in-addr.arpa IN SOA prisoner.iana.org.
hostmaster.root-servers.org. (
2002040800 ; serial
1800 ; refresh (30 minutes)
900 ; retry (15 minutes)
604800 ; expire (1 week)
604800 ; minimum (1 week)
)
NS blackhole-1.iana.org.
NS blackhole-2.iana.org.
!? Internet Draft
1-4. ( )

2-1. (1)
!? Private address
!? 20 4
!?
!?
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( ) ( )
8

T

. R
) . R
) . T R

8 2
4
PTR8
6 :5 9
3PTR8 T
6 :5 93
PTR8
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( ) ( )
8

T

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) . R
) . T R

8 2
4
PTR8
6 :5 9
3PTR8 T
6 :5 93
PTR8

2-2. (2)
!? Private address SOA
!? SOA 5 20
!? dynamic update
. 1 ). A03O
(
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8

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SOA86 :5 9
3SOA8
6 :5 9
3SOA8

2-3. OCN AS112
OCN
!? OCN
!? ISC/WIDE/
AS112Project
AS112
!? AS4713

3-1. OCN AS112
!?
!?
!? OCN DNS
!?
!? Dynamic Update: 30%
!? SOA : 48%
!? PTR : 21%
!? (A,TXT,ANY ) : 1%
192.175.48.1
192.175.48.42
192.175.48.6

3-1. PTR, SOA
!? OCN DNS
!? IP
!?
!?
!? B ADSL
7
!? Update SOA ( ,

%
( ,

12
) 5 34
) 5 34
%
, 21 / 6 3 0 ? ?
%C
37 91
2
% 5
9
/ 0 1,/ 0623 ? ?

3-2. dynamic update
!?
update
!?
!? 6
(Windows
)
!?
745
)

%
745
)

(
23
, 1
2 1/ 0 36 ? ?
61
7 0
%
C
8 2
3 1
%
/ 6 032 1 ? ?
8.0.168.192.in-addr.arpa. PTR ***.local.
5.8.14.10.in-addr.arpa. PTR hostname. co.jp

3-3. 0
!? 0 SOA
!? 0
!? update
!? Windows 192.175.48.{42, 6} (2006/11/13-14)
? , )

(
)
(+
(+
(+
(+
(+
(+(
(
(
(
A
:9
1 / 20
1
/ 20
64375

!? AS112 Project
http://public.as112.net/
!? Internet Draft
!? AS112 Nameserver Operations
http://www.ietf.org/internet-drafts/draft-jabley-as112-ops-00.txt
!? I'm Being Attacked by PRISONER.IANA.ORG!
http://www.ietf.org/internet-drafts/draft-jabley-as112-being-attacked-
help-help-00.txt
!? Locally-served Zones
http://www.ietf.org/internet-drafts/draft-ietf-dnsop-default-local-
zones-00.txt

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Internet traffic in Japan has been growing consistently, increasing 17.8% in 2010 compared to the previous year. As an internet service provider, OCN faces challenges in scaling its backbone network to handle rising traffic volumes. Specifically, OCN struggles with the scalability of router forwarding tables as routing tables expand dramatically. When link failures occur, full table updates take significant time, disrupting services. OCN also experiences traffic imbalance issues across its numerous link aggregation interfaces as flows are distributed non-uniformly. To address these problems, OCN is implementing hierarchical forwarding tables and improving hash algorithms for link aggregation.

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JANOG is a community of over 6,700 network engineers in Japan founded in 1997 that discusses technical and operational issues across organizations. It holds semiannual two-day meetings with presentations and discussions primarily in Japanese. Meetings typically attract 800 attendees in Tokyo and 400 elsewhere. Topics have included traffic engineering, data center routing, and best operational practices. It is run by volunteers and supported by hosts, sponsors, and donations.

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APRICOT 2011 - OCN Experience to Handle the Traffic Growth and the FutureChika Yoshimura

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