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IPv6 Deployment in Academic Networks. Tim Chown University of Southampton, UK [email protected] UK IPv6 Task Force seminars, 16 Jan 2003. Academic networking. Network availability is no longer just a “nicety” Networks are mission critical And so is the IP protocol that underpins them.

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ipv6 deployment in academic networks

IPv6 Deploymentin Academic Networks

Tim Chown

University of Southampton, UK

[email protected]

UK IPv6 Task Force seminars, 16 Jan 2003

academic networking
Academic networking
  • Network availability is no longer just a “nicety”
  • Networks are mission critical
    • And so is the IP protocol that underpins them.
  • Academic networks are and can be used for
    • Commercial university operation
    • Research projects
    • Wireless campuses
    • Remote learning
    • Collaborative working
    • Distributed computing (the Grid and E-Science)
the uk academic network
The UK academic network
  • Provides connectivity for
    • Over 200 universities
    • Over 400 further education colleges
  • The network is called JANET
    • The current instance is SuperJANET4
  • The “ISP” maintaining it is UKERNA
    • Provides additional services
      • e.g. Premium IP, IPv4 Multicast, H.323 conferencing
    • Can (within limits) deploy new services without a direct or immediate commercial benefit
uk academic janet pilots
UK academic (JANET) pilots
  • Trials and pilots on JANET
  • Phase 1
    • Bermuda project, ATM PVCs, 1999-2000
  • Phase 2
    • SuperJANET4 removed ATM in favour of PoS networks
    • Tunnels to single pilot router, IPv6 over IPv4, 2001-2002
  • Phase 3
    • Dual-stack IPv4/IPv6 on the JANET core network, 2003
    • To commit, we need performance and reliability
    • Mustn’t adversely affect the IPv4 service
    • Must co-exist with IPv4 Multicast and IPv4 QoS.
  • A 12-month project run between three UK universities
    • Southampton, UCL and Lancaster
  • Tested IPv6 connectivity between ATM routers
    • IPv6 run over ATM PVCs, at 2Mbit/s
    • Static routing
  • Basic services run for validation:
    • DNS (BIND 9)
    • Web (Apache server, Mozilla client)
    • Email (Sendmail 8.10.x)
  • Produced five reports
    • Available still at www.ipv6.ac.uk
dual stack strategy
Dual-stack strategy
  • NRENs need an IPv6 transition strategy
    • Need to be able to carry IPv6 on their infrastructure, and offer IPv6 services
  • Can run IPv4 and IPv6 on the same router equipment, and run both protocols over the same links, natively
    • Requires vendor implementation to have fast (hardware-based) IPv6 forwarding, and to support the required IPv6 routing protocols (BGP4+)
dual stack deployments
Dual-stack deployments
  • The US research network, Abilene, has migrated to dual-stack, running both protocols
    • Initially using Cisco, now using Juniper routers
    • Running at up to 10Gbit/s
    • IPv6 forwarding tested to over 8Gbit/s
  • European National Research and Education Networks (NRENs) are following:
    • SURFnet (Netherlands), Renater (France), Funet (Finland) have all migrated already.
g ant and 6net
  • All the European NRENs are interconnected by GÉANT, offering a production IPv4 network service
    • Up to 10Gbit/s links, using Juniper routers
    • Planning to introduce dual-stack networking by mid-2003, following Abilene’s lead
    • Many NRENs planning in sync with GÉANT
  • GÉANT set new IPv6 Land Speed Record
  • 15 NRENs are members of the 6NET project
    • Has deployed a native IPv6-only network
    • Funded in part by the European Commission
the project
The project
  • Deployed a pan-European IPv6 research network
    • Backbone in place since May 2002 at STM-1 rates
  • Project runs until December 2004
    • 1,100 man months between 35 partner organisations
  • Many study areas beyond the basic network rollout:
    • Transition tools, MIPv6, DNS, QoS, address allocation policies, IPv6 multicast, IPsec, VPNs, multihoming, application porting, VoIP, Globus/GRID toolkit, multimedia tools, network management and monitoring,…
  • Desire to interconnect to international networks to further research goals through collaboration
ipv6 address space
IPv6 address space
  • In Europe, IPv6 address space is allocated by the RIPE NCC
    • Most (all?) NRENs have a production IPv6 network address allocation (SubTLA)
    • The prefix is a /32, e.g. JANET is 2001:0630::/32
    • Each university site would receive a /48 prefix
    • Thus an NREN can address 2^16 universities
    • A site /48 prefix allows 2^16 site subnets to be allocated, with up to 2^64 (!) hosts per subnet
  • Address allocation policies will be important
international ipv6 routing
International IPv6 routing
  • Key international academic networks are now working together to get predictable, reliable international IPv6 networking.
    • Abilene
    • 6NET
    • Some NRENs (the Dutch, Finns, French)
    • Euro6IX (an ISP-oriented research network akin to 6NET)
    • WIDE (Japan)
  • Using dual-stack (native) transatlantic links
    • From Sweden, Netherlands
    • Phasing out long-haul IPv6-in-IPv4 tunnels
vendor support
Vendor support
  • Hosts
    • *BSD, Linux, Windows 2000, XP, .NET, CE .NET, Solaris 8 and Solaris 9, Mac OS X (Jaguar), HP/UX (and Tru64 from Compaq), IBM AIX, Irix, …
  • Routers:
    • Cisco (IOS), Juniper (JUNOS), Hitachi, 6WIND, *BSD, Zebra (open source), ZebOS (by ipinfusion), Nortel Networks, MRTd, …
wireless campus deployment
Wireless campus deployment
  • Growing numbers of students own laptops
  • PDA devices have Wireless LAN adaptors
  • Opportunity to deliver WLAN in campuses
    • Easy access to information
    • New channels to deliver material, location-aware
    • Ability to chat, or receive notifications
  • Mobile IPv6 enables campus-wide roaming
    • Much improved features over Mobile IPv4
access into student homes
Access into student homes
  • Many student homes now have ADSL
    • And many of those homes have Wireless LAN
  • Many student halls have Ethernet
  • Can consider broadband applications
    • Conferencing between tutor and student
    • Delivery of multimedia data
    • File sharing
  • IPv4 home networking invariably uses NAT
    • Makes it hard to run applications into the home
    • IPv6 enables remote access for many applications
ipv6 applications
IPv6 Applications
  • By deploying IPv6 we hope to promote
    • Peer-to-Peer (p2p) applications
    • Transparent end-to-end connectivity (no NAT, middleboxes)
    • New Grid and distributed computing functionality
    • New mobile features
    • Device to device communication
    • New classes of devices, e.g. remote sensor networks
  • There is no killer IPv6 application (yet…)
    • But the Web came many years after IPv4 was deployed
what will 2003 bring
What will 2003 bring?
  • GÉANT migration to dual-stack like Abilene
    • More NRENs also migrating
  • More vendor support
    • More features, better performance
  • Some IPv6 deployment in Wireless LANs
  • Stability in international IPv6 routing
  • Clearer transition scenarios from the IETF
  • Various phones with IPv6 embedded (for 3G)
  • New IPv6-enabled applications emerging
    • e.g. The Globus Toolkit for Grid
the end users
The end users…
  • The key is to bring the universities online
    • Transition strategies and cookbooks
    • Need carrots to attract large volumes of users
    • NRENs are making national networks IPv6-enabled
    • No mandate for universities to deploy
    • Early interest, like IPv4, will be in the CS departments
  • Show working examples
    • Site case studies, including DNS, email, www services…
  • Need to identify and tackle “missing pieces” for IPv6 academic deployment – underway in 6NET.
sites to visit
Sites to visit
  • UK IPv6 Task Force
    • http://www.uk.ipv6tf.org/
  • 6NET
    • http://www.6net.org/
    • http://www.6net.org/publications/
  • IPv6 in UK academic sites
    • http://www.ipv6.ac.uk/
backup slides

Backup slides

(not used on the night)

the ietf ipv6 related wgs
The IETF IPv6-related WGs
  • Has many IPv6-related working groups
    • IPv6 WG (was IPng)
    • V6 Ops WG (was ngtrans)
    • Mobile IP (for Mobile IPv6)
    • DHC WG (for DHCPv6)
    • DNSEXT (for IPv6 DNS)
  • Core standards have been available for 2-3 years
  • MIPv6 and DHCPv6 now finalising to RFC status
  • The IETF is now pushing IPv6 into all WGs
the m6bone
The m6bone
  • IPv6 Multicast protocols are being developed and implemented
  • Problem in deployment is similar to IPv4
    • Need IPv6 Multicast support in routers
    • Otherwise need to tunnel IPv6 Multicast in regular (unicast) IPv6 or IPv4 links
  • First international testbed is the m6bone
    • Centred on a router operated by Renater in Paris
    • http://www.m6bone.net