IPv6 Tim Chown University of Southampton & UKERNA TF-NGN Meeting, Rome 6 th February 2003

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

m6bone status IPv6 multicast overlay network – 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

m6bone beacon Currently run by: –Hiof (Norway), UoS, SURFnet, UNINETT, PSNC, UCL (UK) Shows: –Loss, delay, jitter –Client versions See:

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

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

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

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

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

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

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

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

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)

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

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 (D2.5.1) Reporting? –Future GÉANT deliverables?

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: 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 23 rd Jan 2003 at Southampton (tt76) and at HEAnet (tt35), Univ. of Vienna (tt73), plus RIPE NCC.

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