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IPv6

IPv6. Tim Chown University of Southampton & UKERNA tjc@ecs.soton.ac.uk TF-NGN Meeting, Rome 6 th February 2003. Agenda. G É ANT IPv6 migration m6bone status A new multicast gateway 6NET update IETF IPv6 update Alcatel and IPv6 (late addition to agenda )

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IPv6

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  1. IPv6 Tim Chown University of Southampton & UKERNA tjc@ecs.soton.ac.uk TF-NGN Meeting, Rome 6th February 2003

  2. Agenda • GÉANT IPv6 migration • m6bone status • A new multicast gateway • 6NET update • IETF IPv6 update • Alcatel and IPv6 (late addition to agenda ) • Hitachi IPv6 router (GR2000) • INFN-GARR IPv6 transition • Discussion: future work & reporting

  3. m6bone status • IPv6 multicast overlay network • http://www.m6bone.net/ • No native multicast infrastructure yet • Most links IPv6 multicast in IPv6 unicast • Many of those running via 6NET network • Some links tunnelled over IPv6 • Growing experience with tools • Routers: *BSD, Cisco, 6WIND • Applications: vic, rat, + audio/video streaming • m6bone used for a 6NET meeting

  4. m6bone beacon • Currently run by: • Hiof (Norway), UoS, SURFnet, UNINETT, PSNC, UCL (UK) • Shows: • Loss, delay, jitter • Client versions • See: http://beaconserver.m6bone.pl

  5. m6bone/multicast next steps • Work with 6NET • Establish “m6net” over 6NET • Native multicast when Cisco GSR ready • Use of BGP in place of RIPng • Standards issues • Multiple RPs for PIM-SM • Advertising PIM-SM RP address? • MLD (and MLDv2) snooping? • Reflectors and gateways (see Stig’s talk) • Run trials of PIM-SSM • Possibly also consider the xcast architecture • Get more sites joining the m6bone community… • New sites in Mexico and Asia • Just need available (BSD/Cisco) router

  6. IETF IPv6 status • Last meeting in Atlanta, November • Next meeting in San Francisco, March • Major changes: • v6ops WG created • ngtrans WG being closed • 6bone being expired • Some focus on transition scenarios • Major standards achievements • DHCPv6 and MIPv6 approaching Draft Standard • But IPv6 multihoming WG (multi6) still stalled

  7. IETF notes… • ipv6mh WG had unofficial meetings • IPv6 flow label still “unused” • send WG: secure neighbour discovery • V6ops transitions scenarios: • unmanaged, enterprise, ISP, cellular • Site-local usage • Problem of ambiguity and leakage • But need addressing for disconnected networks • ENUM services can run with IPv6 • UoS is in UK ENUM pilot with IPv6 and VOCAL

  8. IPv6 “missing pieces” • (see 6NET deliverable D2.5.1) – includes: • Network robustness • Routing stability, preferring vv/v6, multihoming • Network management/services • DNS, SNMP, service discovery, multicast, prefix delegation • Application issues • Porting, site-locals, flow label, software (e.g. SQL), IPv6 Privacy Extensions (RFC3041) implications • Security issues • IPSec use, firewall requirements, transition security

  9. GTPv6 network • Used in the past for inter-NREN tests • 6bone object “GTPV6” • ASN 8933 • Continued allocation from RIPE NCC for tests • 6bone pTLA 3ffe:8030::/28 • Previously each NREN received a /34 allocation • 6bone now being deprecated • GR2000 now running GTPv6 core • Located at Southampton (not ideal) • Runs BGP4+ to UK IPv6 pilot service • Janos investigating route table dump and similar tools

  10. Hitachi GR2000 • Based on BSD • Originally a software-based router • New model has hardware acceleration • Configure via Unix commands • Can just text-edit configuration files • Various formats from 2H to 20H • Model being used on GTPv6 is a 6H • 8 x Fast Ethernet, 1 x GigE, 1 x E1 • GR2000’s are being used on Euro6IX • Project deploying telco-focused exchange points • Various router platforms being used

  11. GR2000 configuration • default { • ethernet_type 100m_full_duplex; • }; • routerid 152.78.189.26; • static { • default gateway 152.78.65.254; • }; • line iam ethernet 4/0; • ip iam { • 152.78.64.51/23; • 2001:630:d0:111::3; • }; • router { • remote_access 152.78.65.53; • local_address 3ffe:8030::1; • remote_access 2001:738:0:401:202:3fff:fe3b:41fa; • remote_access 152.78.64.50; • remote_access 2001:630:d0:111:202:b3ff:feab:a950; • remote_access 2001:738:0:402:209:6bff:fe8c:886b; • };

  12. GR2000 config (ctd) • autonomoussystem6 8933; • bgp4+ yes { • group type external peeras 786 { • peer 3ffe:8030::2; • }; • }; • tunnel ukerna { • 152.78.64.51 remote 193.63.175.6; • }; • ip ukerna { • 3ffe:8030::1 destination_ip_address 3ffe:8030::2; • }; • export proto bgp4+ { • proto aggregate; • }; • aggregate 3ffe:8030::/28 { • proto direct; • proto static; • };

  13. GR2000 config (ctd) • pim6 yes { • sparse { • candidate-rp yes { • group { • ff0f::/16; • }; • }; • candidate-bsr yes; • }; • }; • (BSD and GR2000 have BSR function, IOS – I believe- does not) • (There is no ssh access for the GR2000 – there is for the 6WINDGate routers for example)

  14. Possible GTPv6 tests • New multicast experiments • GR2000 supports PIM-SM and –SSM • BGP route exchanges (instead of RIPng) • Interoperability • Anyone welcome to peer (but not advised as primary route or connectivity) • Has BGP4+, RIPng, OSPF, but not IS-IS • Connection with Juniper M5 at Renater • Create GTPv6 “backbone” • Multihoming • Using GTPv6 path and “production” path

  15. Future work? • GTPv6 experiments • Working with 6NET • Testing different hardware • i.e. other than Juniper and Cisco • e.g. Hitachi, BSD, Zebra, Alcatel,… • GÉANT migration • Assisting DANTE to work with NRENs • IPv6 “missing pieces” • See http://www.6net.org/publications/ (D2.5.1) • Reporting? • Future GÉANT deliverables?

  16. RIPE NCC TTM Server • A popular test traffic measurement device, built for IPv4 use • BSD box maintained by RIPE-NCC, costs ~3,000 Euros • See: www.ripe.net/ttm • Recently ported to include IPv6 • Porting after discussions with 6NET • Porting included:- • Test probes, web access, reporting tools • BSD kernel upgraded for IPv6 support • IPv6 available now to new TTM users • Running since 23rd Jan 2003 at Southampton (tt76) and at HEAnet (tt35), Univ. of Vienna (tt73), plus RIPE NCC.

  17. Using the TTM server • Very useful for assessing routing, performance and availability of links, and changes in routing • Packet delay and number of hops, delay variation • Packet loss (and GPS/NTP clock sync) • Histories of path traceroute outputs • Highlights changes in outputs (good or bad changes) • Important for getting IPv6 international routing to IPv4-like production quality for routine day-to-day use of IPv6 applications • TTM servers exist in US and Japan • Aim for IPv6 TTM servers in Abilene, Euro6IX, WIDE? • Run Abilene tools here (with e2epi & PERT cooperation?) • Would be interesting to compare IPv4 vs IPv6 properties

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