JGN II (Japan Gigabit Network II)
A research and development system for advanced broadband networks

Yoshihiko Kanaumi
NEC CorporationNEC Bldg., 5-7-1 Shiba
Minato-ku, Tokyo, 108-8001 Japan
Takashi Miyake
Kurashiki University of Science and the Arts
Nishinoura 2640, Tsurajima-cho
Kurashiki-shi, Okayama, 712-8505 Japan

Ichiro Yamauchi
NTT Communications Corp.
NTT Hibiya Bldg., 1-1-6 Uchisaiwai-cho
Chiyoda-ku, Tokyo, 100-8019 Japan
Kazumasa Kobayashi
Kurashiki University of Science and the Arts
Nishinoura 2640, Tsurajima-cho
Kurashiki-shi, Okayama, 712-8505 Japan

Hiroshi Esaki
The University of Tokyo
Hongo 7-3-1 Bunkyo-ku, Tokyo, 113-8656 Japan
Abstract
This paper presents a overview of JGN2, Japan Gigabit
Network 2, which has been established on the end of March
2004. JGN2 was built as a successor of JGN1, which has
been established by Telecommunication Advancement Organization (TAO) in 1999. First, JGN2 network structure isexplained. JGN2 provides gigabit level layer one, two, threefunctionalities to the research communities. Layer one provides optical path, layer two provides Ethernet connection,layer three provides IPv6 network respectively. JGN2 canbe used not only for Japanese domestic network research
but also for international network research. Network structure of Pacific Northwest GigaPoP and Aisia Pcific POPs
are described and it is shown how JGN2 is connected toother gigabit research network in worldwide. Experiments
on JGN2 at international conferences are also described.
High Definition(HD) TV transmission experiment at JGN2
symposium 2005 and VoIP connection to the Internet at
APRICOT 2005 is described and examined the effectivenessof the gigabit network.

1. Introduction
In Japan, we use the most inexpensive broadband Internet in the world, and amount of the high quality multimedia
contents flow in the Japanese Internet grows very rapidly.
As the usage of the broadband internet increases, someproblems occur gradually. To use multimedia in the Internet,
we need to solve many issues for VoIP, video, security, etc.
The National Institute of Information and Communications
Technology (NICT)[1] conducts research and development
for various technologies to resolve these problems. NICTactivities cover not only commercial base services but also
consumer base services. NICT is also very active on the research on an international network. Japan Gigabit Network
1 (JGN1) was designed for the nation-wide research and development network for high speed network infrastructure.
JGN1 was used for the research on the multimedia transmission, collaboration through the network, IPv6, multicast,etc. Japan Gigabit Network 2 (JGN2) has the same objectives as JGN1, however uses different technologies. While
JGN1 deployed ATM, JGN2 deployed 10Gigabit or 1Gigabit Ethernet in addition to the bandwidth increase. A nationwide IPv6 testbed, which was the largest scale of multivendor IPv6 network was developed on the JGN1 as well.
JGN2 needs to take over the JGN2 IPv6 functions. The network transition from JGN1 IPv6 to JGN2 IPv6 has beensmoothly achieved last year, and JGN2 IPv6 is used continuously for various researches, for example, IPv6 multicast
transmission of multiple sources at the Sapporo Snow Festival project. It is possible to send moving image with higher
quality than DV1 format, is HD2 format, and it can be IPv6multicasted.
Furthermore JGN2 has the international POPs, Pacific12Digital video
High Definition

hyogo-1
hyogo-2

tokyo-1

wakayama

tsukuba[Legends ]20Gbps
10Gbps1Gbps
Optical testbeds

Access points
Core network nodes(Available as access points)

G>
Chugoku Core network node (Okayama)< G>(Okayama)
Teleport Okayama
Hiroshima University(Higashi Hiroshima)<M>
Tottori University of Environmental Studies(Tottori)
Techno Arc Shimane(Matsue)
New Media Plaza Yamaguchi (Yamaguchi)<<G>
Kyushu Core network node(Fukuoka)
NICT Kita Kyushu IT Open
Laboratory
Kita Kyushu,Fukuoka
Kyushu University(Fukuoka)<M>
NetCom Saga(Saga)
Nagasaki University(Nagasaki)
Kumamoto Prefectural Government(Kumamoto)
Toyonokuni Hyper Network AP * (Oita)(Miyazaki)
Miyazaki University
Kagoshima University(Kagoshima)<1 G>
Hokuriku Core network node(Kanazawa)
Ishikawa Create Lab(Tatsunokuchi-machi, Ishikawa Prefecture)<M>
Toyama Institute of Information Systems (Toyama)(Fukui)
Fukui Information Super Highway AP *<1 G>
Kinki Core network node(Osaka)
NICT Keihanna Human Info- Communication(Seika-cho,Kyoto)
Research Center
Kyoto University(Kyoto)
Osaka University(Ibaraki)< G>
NICT Kansai Advanced Research Center (Kobe)<M>
Biwako Information Highway AP *(Ohtsu)
Nara Prefectural Institute of Industrial(Nara)
TechnologyWakayama University(Wakayama)
Hyogo Prefecture Nishiharima Office(Kamigori-cho, Hyogo Prefecture)

NICT Kita Kyushu
IT Open Laboratory>
Hokkaido Core network node(Sapporo)<M>
Network Organization for Research andTechnology in Hokkaido(Sapporo)< G>
Tohoku Core network node(Sendai)< G>
Tohoku University(Sendai)
NICT Iwate IT Open Laboratory(Takizawa-mura, Iwate Prefecture)<M>
Hachinohe Institute of Technology(Hachinohe, Aomori Prefecture)
Akita Regional IX *(Akita)
Keio University Tsuruoka Town Campus(Tsuruoka, Yamagata Prefecture)(AizuWakamatsu)
The University of Aizu

Sapporo<>Shinetu Core network node(Nagano)<M>
Niigata University(Niigata)
Matsumoto Information
Creative Center(Matsumoto,NaganoPrefecture)

USATokyoNaha<<<>Okinawa Core network node(Naha)>
Shikoku Core network node(Kochi)
M>
Kagawa Creation of New Industries Support(Takamatsu)
CenterThe University of Tokushima (Tokushima)
Ehime University(Matsuyama)
Kochi University of Technology(Tosayamada-cho, Kochi Prefecture)<<kyoto-univchiba

Nagoya

NICT Tsukuba
Research Center>
Tokai Core network node(Nagoya)
M>
Nagoya University(Nagoya)
University of Shizuoka(Shizuoka)
Softopia Japan(Ogaki, Gifu Prefecture)
Mie Prefectural College of Nursing (Tsu)kyototokyo-univ kanagawa

yamanashiniigata<1 G>
KANTO Core network node A (Chiyoda Ward, Tokyo)
KANTO Core network node B (Chiyoda Ward, Tokyo)
NICT Koganei Head Quarter(Koganei, Tokyo)
NICT Tsukuba JGN Research Center(Tsukuba, Ibaraki Prefecture)
The University of Tokyo(Bunkyo Ward, Tokyo)
NICT Kashima Space Research Center(Kashima, Ibaraki Prefecture)<1G>
Yokosuka Telecom Research Park
(Yokosuka, Kanagawa Prefecture)<100M>
Utsunomiya University(Utsunomiya)
Gunma Industrial Technology Center(Maebashi)
Reitaku University(Kashiwa, Chiba Prefecture)
NICT Honjo Multi-Media Open Laboratory(Honjo, Saitama Prefecture)
Yamanashi Prefectural Open Center for R&D(Tamaho-cho, Yamanashi Prefecture)USAnagoya-2

nagoya-1

shizuokanagano-1

gifu
nagano-2

mietohoku-univ

kagawakochi-1

tokushima

iwate
sendaiehime

tottorishimaneokayama-1

kanazawa-1

kochi-2

yamaguchi
fukuoaka

yamagata

OkayamaKochiosaka-univ

akita

Nagano

NICT Keihannna
Human InfoCommunications
Research Centershigagunma

fukushima

NICT Koganei
Headquarters

Osakanaraosaka

saitamaaomoriSendaiKanazawa

Fukuokatokyo-2

tochigi<hiroshima-univ

toyama fukui kanazawa-2

okayama-2

hokkaido-1
hokkaido-2
kyushu-univsagakumamotooitanagasaki

miyazakiokinawakagoshimakita-kyushu

100Mbps
1Gbps
1Gbpsx2
10GbpsHitachi
GS4000AlliedTelesis
9812T

Figure 2. Layer2 network topology*IX:Internet eXchange AP:Access Point

Figure 1. Outline JGN2 Network
Northwest GigaPoP (PNWGP), Asia Pacific POPs.
This paper describes the outline of JGN2 structure, international connection from Tokyo to PNWGP and Asia Pacific POPs, and JGN2 usage at JGN2 Symposium 2005 in
Osaka are explained.

• Layer 3 IPv6 connection/network services This service
connects JGN2 users among each other, or to other research networks and other users, at the IP level (a service with an IPv4/IPv6 dual stack).
• Available interfaces to JGN2 user are:
1. 10/100/1000base-T
2. 1000base-X

2. Overview of JGN2 network
JGN2[2] outline network is shown in Figure1. JGN2 iscomposed of the following 4 functions of the network, Optical Testbed Network, GMPLS 3 Testbed Network, Layer 2Ethernet Testbed Network, and Layer 3 IPv6 Testbed Network. Layer 3 IPv6 Testbed Network is composed of thefollowing 3 functions of network: IPv6 native, IPv6 multicast, and international connections. JGN2 has access points
capable of providing layer 2 services not only throughout
47 prefectures and city governments (totalof 63 places) inJapan, PNWGP and Asia Pacific POPs international accesspoints. The network’s entire core-nodes is connected with
10GBase-X links. At the JGN2 access points, layer 2 Ethernet and layer 3 IPv6 services are available. Additionally,the IPv6 multicast is of course available. JGN2 has accesspoints in PNWGP and Asia Pacific POPs for international
connections in addition to the Japanese locations. Details ofthe network such as bandwidth of every link and topology
is shown in Figure 2. Figure 3 shows Layer 3 Testbed Network topology. Layer 2 and Layer 3 service provide the following:• Layer 2 Ethernet connection/network services
1. Point-to-Point connection service. This service
connects 2 points by L2 connection based on
VLAN.
2. Multi-point connection service. This service connects multiple points by L2 connection based on
VLAN.

3. 10Gbase-X, LR or ERLayer 2 Testbed Network consists of the equipment ofLayer 2 switch devices Hitachi GS4000 series and AlliedTelesis CentreCOM series. Layer 3 IPv6 Testbed Network
can handle BGP4+, OSPFv3, PIM-SM, MLD[3]. Layer 3
IPv6 Testbed Network consists of the router which supports
those protocol with Hitachi GR4000 series, Allied Telesis
SB7800R series, and NEC IP8800/R series.
JGN2 also offers the following Layer 1 services with thenext generation network technologies:• GMPLS Testbed Network• Optical Testbed Network

3. Internationalized JGN2
JGN2 provides international Layer 2 and Layer 3 services in the same way as domestic JGN2 services. As shownin Figure 4, presently the international connection point
have been constructed in the U.S.A. Configuration of JGN2
Japan-US link is as follows (in the Figure5):• 10Gbps (10GbE-EW) 1 line
• JAPAN (Tokyo) - USA (PNWGP, Chicago)• To succeed TRANSPAC• Management under (or as ) JGN2 project (Link ownerNICT)㫎㫀㪻㪼㪃㩷㪼㫋㪺㪅㪅㪅㫆㪺㫅㪆㫍㪼㫉㫀㫆㪍㪸㫇㪸㫅㪥㪪㪧㪠㪯㪧㪄㪍㫅㫆㫋㪼㪄㫋㪊㪉㪇㪄㪈㫆㫋㪼㫄㪸㪺㪿㫀㪅㪾㫉㪉㫂㫂㫆㫋㪼㪄㪾㫉㪋㫂㪄㪈㫅㫆㫋㪼㪄㫀㫇㪏㪏㪄㪈㫀㫊㪿㫀㫂㪸㫎㪸㪄㪺㪸㫋㪍㪌㪄㪈㫋㫆㪿㫆㫂㫌㪄㪾㫊㪋㫂㪄㪈

Figure 4. Third Generation DR㪅㪈㪅㪑㪊㪏㪇㪈㪑㫂㫐㫌㫊㪿㫌㪄㫊㪹㪎㪏㪄㪈㫋㫆㫂㫐㫆㪄㫀㫇㪏㪏㪄㪈㫆㫂㪸㫐㪸㫄㪸㫅㪻㫆㫁㫀㫄㪸㪄㪾㫉㪋㫂㪄㪈

Figure 3. Layer3(IPv6) network topology

JGN2 Tokyo - Chicago Network Configuration for Operation%JKECIQ
0QTVJ9 GUVGTP70+8

JGN2 has the 10GbE-EW connection to PNMGP,Chicago. In addition, Juniper T640 which JGN2 operates provides connection to Asia/Japan R&E networks directly, and US R&E Networks via TransPAC2, and PacificWAVE. Procket 8812 is directly connected to Asia/Japan
R&E networks as well.

JGN2Users

PKH
PKH
01%0GVYQTM,)05YKVEJ)5-,)05YKVEJ)5-Tokyo POP has JGN2 Network Operation Center whichcontrols and manages whole JGN2 network. As shown inFigure5, the domestic NOC is located in NTT Otemachi,
and the international NOC in KDDI Otemachi.

3.2. Pacific Northwest GigaPoP
As shown in Figure 5, We installed Hitachi GS4000/80E,
Super-micro SC822R-400RC, Cisco 7960, Allied Telesis
Centre-COM 9812T. Configuration of these devices are as
follows:• Hitachi GS4000/80E:
3ports 10Gigabit Ether(EW, LW, LR), 12ports 1Gigabit Ethernet(SX)
10GbE-EW is for Tokyo POP.
10GbE-LR is for Force10, StarLIGHT.
10GbE-LW is for reserve.
• Supermicro SC822R-400RC:
Pentium4 3GHz, Mem 512MB*2, HDD SEAGATE250GB*2(RAID-1), 100Base-TX*2, 1000Base-SX*1• Allied Telesis CentreCOM 9812T:
12ports 10/100/1000Base-TX, 4ports 1Gigabit Ethernet(SX))$#5'.4

5VCT.+)*6

PKH

PKH

US R&E
Networks

72%

6QM[QHQT&GOQ#DKNGPG
5VCT.+)*60+50066 %1VGOCEJK

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9 #8'.QU #PIGNU(QWPFT[2TQEMGV,WPKRGT
6

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3.1. Tokyo POP

2TQEMGV

8 Q+2#668.#0+&UHQT#2 #0
8.#0HQT/QPKVQTKPI
8.#0HQT8Q+2
8.#0+&UHQT&GOQ

Asia/
Japan
R&E
Networks

8.#0HQT#2#05GTXGTU
8.#0HQT#2#001%

Figure 5. Tokyo POP and PNWGP• Cisco 7920:
usage as the communication tool for the operators, andinstallation of Call Manager in NTT Otemachi, Tokyo
In order to login to these devices except Cisco 7920, operators must login to Supermicro SC822R-400RC server.
Therefore Supermicro SC822R-400RC server is set ACLs
to limit the network login. Furthermore, we’ll only use SSHfor remote login.

3.3. Asia Pacific POPs
JGN2 Asia Pacific POPs opens in November 2005. Configuration of Asia Pacific POPs is similar to the PNWGP
and provides Layer 2 and Layer 3 connections to the APAN
group Asian counties shown in Figure6.

4. The international conference
In this section, two events which use JGN2 are described to show how effective the network is for interna-Figure 6. APAN Grouptional events.

4.1. JGN2 Symposium 2005 in Osaka
January 20, 2005 – Dignitaries and researchers attending
the JGN2 Symposium 2005 in Osaka, Japan. This week listened and watched as Internet visionary Larry Smarr gave
the keynote presentation on a large high-definition television (HDTV) screen above the podium. Unlike traditional
keynote speakers, Smarr was 5,000 miles away in Seattle,
Washington, but the picture was so clear that Osaka attendees could even distinguish a hair on the speaker’s head.
Advances in transmitting live, uncompressed HDTV signals
over optical networks are enabling true tele-presence, inwhich participants feel they were together in the same room.
The Internet HDTV broadcast system used for this event
was developed by the University of Washington for theResearchChannel. A server in Seattle transmitted uncompressed, real-time, high-definition digital video and digitalaudio at very high quality and in low latency to a clientsystem in Osaka. Professor Smarr’s presentation originatedon the University of Washington campus in Seattle andwas transmitted without any compression at 1.5 Gbps tothe Pacific Northwest GigaPoP (PNWGP)[4], then acrossa 10Gbps transpacific link from Seattle to Tokyo, and thenvia the JGN2 to Osaka. The transpacific link was provided by the Internet Educational Equal Access Foundation(IEEAF)[5], and is managed by the PNGWG in Seattle andthe WIDE project[6] in Japan. The network of JGN2 symposium is shown in Figure 7

4.2. APRICOT 2005 in Kyoto
The APRICOT 2005 Kyoto from February 18th to 25days, was held in Kyoto International Conference Hall(KICH). Inside the conference place wireless LAN service
and wired service in the exhibition space was offered. It waspossible to use the service of the wireless LAN telephone.

Figure 7. JGN2 Symposium Network
T-LEX, WIDE project network, and JGN2 are utilized toconnect the Internet.

5. Conclusions• 10Gigabit Ethernet based nation wide R&D network
JGN2 is explained.
• JGN2 provides Layer2 connections as well as
Layer3(IPv4/IPv6) connections• JGN2 is use not only for R&D but also for international research conference.

6. Acknowledgements
We appreciate all the people contribution to JGN2 worldwide. Specially, when JGN2 and JGN2 IPv6 are constructed, many people relate, appreciate in those people.
In the future, in order to be able to use in for many researchers, you watch the state of network, keep trying torelease the data widely.

References[1] N. I. of Information and C. Technology. NICT - National
Institute of Information and Communications Technology.
http://www.nict.go.jp, 2004.
[2] N. I. of Information and C. Technology. Japan Gigabit Network. http://www.jgn.nict.go.jp, 2004.
[3] B. Haberman. Source Address Selection for the Multicast
Listener Discovery (MLD) Protocol. RFC 3590, 2003.
[4] http://www.pnw-gigapop.net[5] http://www.ieeaf.org/[6] http://www.wide.ad.jp