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1Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
Mark Williams 魏迈凯Academic Networking Liaison,
Asia Pacific
IPv6 IPv6 over Broadband over Broadband Service ModelsService Models
2Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
IPv6 over Broadband Services – IPv6 over Broadband Services – Target Market and Service Target Market and Service
RequirementsRequirements
Carriers in APAC want to run IPv6 across their broadband networks
Most interest so far in Japan due to Government technology push &
funding for IPv6 development
Interest is also growing in other APAC countries including Korea,
India, China, Taiwan, etc.
There have emerged Two IPv6 over Broadband standards :
NTT Com, ACCA, KDDI etc in Japan are running or trialling PPP
based IPv4 and IPv6 “Dual Stack” BRAS
NTT East / West / SI Labs is building a whole new nationwide
network and they want Non-PPP based services.
3Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
Technical Service Technical Service Details for IPv4Details for IPv4
• PPP-Based ServicesPPP-Based Services• Non PPP-Based ServicesNon PPP-Based Services
4Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
IPv4 StandardsIPv4 Standards
• Business broadband – generally uses Bridged or Routed 1483 for static, always-on service models.
• Subscriber services are based on either PPPoE or DHCP.
• Point to Point Protocol over Ethernet (PPPoE) based on PPP, extended by RFC 2516
• Dynamic Host Configuration Protocol (DHCP) is based on work in BootP, extended by RFC 1541, usually implemented as compliant to RFC 2131.
5Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
Protocol Design IntentionsProtocol Design Intentions
• PPPoE• PPPoE is designed to establish a WAN
connection to a remote client. PPPoE extends PPP to Ethernet, providing for authentication, authorization, accounting and network layer configuration.
• DHCP• DHCP is designed to supply DHCP clients
(usually in a broadcast domain i.e. LAN) with network configuration parameters.
8Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
Summary - IPv4 BRAS Service Summary - IPv4 BRAS Service ModelsModels
PPP-based model
• Requires PPPoE client software or CPE device
• Session based service model
• User authentication & accounting information present
• Radius based AAA• Leverages LCP and IPCP
protocols
Non PPP-based model• Business services
• Bridged / Routed 1483 services
• Subscriber Services • DHCP based broadband
remote access• Good for lightweight
clients• Requires many add-ins to
DHCP to allow AAA, session monitoring, accounting, etc etc etc etc….
9Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
IPv6 over BroadbandIPv6 over BroadbandTechnical Service DetailsTechnical Service Details
• PPP-Based ServicesPPP-Based Services• Non PPP-Based ServicesNon PPP-Based Services
10Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
Carrier IPv4 and IPv6
NetworkLayer 2 Access
The PPPoE Dual StackThe PPPoE Dual Stack
VC or VLAN
IPv4 and / or IPv6 devices
Layer 2 or Layer 3 CPE
device
ERX IPv4/IPv6 Edge Router
RADIUS
Simultaneous Support for IPv4 and IPv6 traffic over a single PPP connection
11Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
““Dual StackDual Stack”” PProtocolrotocol LayersLayers
PPPoE or PPPoA
PPP
IPv4 IPv6
IPv4 Applications
IPv6 Applications
Based on PPP(oX)
One PPP Session
Two Layer 3 Protocols
ATM or Ethernet
}
12Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
More detail – IPv4 Connection More detail – IPv4 Connection SetupSetup
PPPoE or PPPoA
PPP / LCP
IPv4 / IPCP
NCP - IPCP used for :• IP address assignment – via Local pools or Radius• DNS Server addresses, etc• etc
ATM or Ethernet
PPP - LCP used for :• user authentication • connection establishment • connection maintenance / monitoring
13Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
Notes about IPv6 Connection Notes about IPv6 Connection setup:setup:
NCP – IPv6CP used only for exchange of Link-Local addresses - not much use at all in a BRAS environment.
JunosE development started in 2002 while specifications were Internet Drafts but they are now RFCs :
DHCPv6 – draft-ietf-dhc-dhcp6-26.txt RFC 3315
draft-troan-dhcpv6-opt-prefix-delegation-01.txt RFC 3633
draft-ietf-dhc-dhcpv6-opt-dnsconfig-03 RFC 3646
14Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
Carrier IPv4 and
IPv6 Network
Layer 2
Access
How else can the PPPoE model be How else can the PPPoE model be used ?used ?
VC or VLAN
IPv4 and / or IPv6 devices
Layer 2 CPE device
ERX IPv4/IPv6 Edge Router
• Native Client device support for both IPv4 and IPv6 over single PPP stack
•Eg - simply extend the existing Windows XP PPPoE client to support IPv6
•Eg Windows “VISTA” 2007?
15Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
Technical Service Technical Service DetailsDetails
• PPP-Based ServicesPPP-Based Services• Non PPP-Based ServicesNon PPP-Based Services
16Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
Carrier IPv4 and
IPv6 Network
Layer 2
Access
The Non-PPP modelThe Non-PPP model
Prefixes statically provisioned on user facing interface (VC / VLAN) DHCP-PD and opt-DNS could also be used without PPP ND / RA could also be used to advertise prefixes over Ethernet access
How to do DNS in this case ?
Less protocol overhead due to no PPP – BUT – bit of a drag due to lost functionality (user auth, accounting, session monitoring, etc)
VC or VLAN
IPv4 and / or IPv6 devices
Layer 2 or Layer 3 CPE
device
ERX IPv4/IPv6 Edge Router
17Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
Carrier IPv4 and
IPv6 Network
Layer 2
Access
Prefix Assignment in the Non-PPP Prefix Assignment in the Non-PPP modelmodel
- Layer 3 CPE Case - Layer 3 CPE Case
VC or VLAN
IPv4 and / or IPv6 devices
Layer 3 CPE device
ERX IPv4/IPv6
Edge Router
•IPv6 connection setup : • DHCP-PD & Opt-DNS – directly over Ethernet
•IPv4 connection setup : • PPPoE
• ND / RA• (requires gateway
router to be a DNS Proxy )
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Layer 3 CPE - DetailsLayer 3 CPE - Details
Prefixes statically provisioned on the BRAS One Prefix per access subinterface (VC / VLAN)
DHCP-PD and opt-DNS used between BRAS and CPE router CPE initiates DHCPv6 exchange to BRAS
Requests IPv6 Prefix via DHCP-PD Requests DNSv6 info via Opt-DNS
BRAS responds with configured values ND / RA used to assign IPv6 addresses to IPv6 devices behind
CPE Router.
19Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
Carrier IPv4 and
IPv6 Network
Layer 2
Access
Prefix Assignment in the Non-PPP Prefix Assignment in the Non-PPP modelmodel
- Layer - Layer 22 CPE Case CPE Case
VC or VLAN
IPv4 and / or IPv6 devices
Layer 2 CPE device
ERX IPv4/IPv6 Edge Router
• Neighbor Discovery• Router Advertisement
• (some sort of DNS info exchange?)
24Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
IPv6 BRAS Service Model IPv6 BRAS Service Model SummarySummary
• PPP based• Requires Dual Stack
(IPv4/v6) PPPoE client or device
• Session based service model
• User authentication & accounting information present
• Radius based AAA• Leverages DHCP-PD
and opt-DNS
• Non PPP-based
• DHCP-PD or ND/RA can be used in the access network
• No native authentication or accounting
• More suitable to “always-on” service
25Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
IPv6 ServicesIPv6 Servicesand Productsand ProductsIn Use TodayIn Use Today
26Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
Broadband Access
Juniper IPv6 Firewall and B-RASJuniper IPv6 Firewall and B-RAS
IPv4 and / or IPv6 devices
NS 5XTIPv6 CPE Firewall
PPPoE
PPP
IPv4 IPv6
ATM VC or Ethernet VLAN
•One Circuit
•2 Network Protocols
ERX IPv4/IPv6 B-RAS
IPv4 / IPv6 Firewall &
VPN platform
IPv4
IPv6
DHCP-PD or NeighborDiscovery
27Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
28Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
29Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
31Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
References in IPv6 Network References in IPv6 Network EngineeringEngineering
• GEANT V6 task force
• http://www.join.uni-muenster.de/geantv6/
• DANTE:
• www.dante.net/nep/ipv6/index.html
32Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
IPv6 Network ReferencesIPv6 Network References
GEANT IPv6 Test Program: http://www.juniper.net/news/pressreleases/2001/pr-011128.html
ESNET / 6TAP at PAIX: http://www.juniper.net/news/pressreleases/2001/pr-011128.html
France Telecom / VTHD: http://www.juniper.net/news/pressreleases/2001/pr-011128.html
CSC / FUNET: http://www.juniper.net/news/pressreleases/2002/pr-020507.html
Internet2 / Abilene: http://archives.internet2.edu/guest/archives/I2-NEWS/log200204/msg00003.html
Canarie / CA*net 4: http://www.juniper.net/news/pressreleases/2002/pr-020710.html
ESNET: http://www.juniper.net/news/pressreleases/2002/pr-020828.html
ARNES, DANTE, and REDiris: http://www.juniper.net/news/pressreleases/2002/pr-021003.htmlhttp://archives.internet2.edu:8080/guest/archives/I2-NEWS/log200210/msg00005.html
Internet2 Gigapops: http://www.juniper.net/news/pressreleases/2002/pr-021111.html
Japan Gigabit Network: http://www.juniper.net/news/pressreleases/2002/pr-021112.html
Chunghwa Telecom HiNet: http://www.juniper.net/news/pressreleases/2003/pr-030114.html
NTT Communications: http://www.juniper.net/company/presscenter/pr/2003/pr-030218a.html
33Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
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34Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
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36Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net
Juniper Networks IPv6 deploymentJuniper Networks IPv6 deploymentWorldwideWorldwide
Americas EMEA APAC
Thank You