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IPv6 Multicast Technology

IPv6 Multicast Technology. Protocols: multicast BGP PIM Sparse Mode and PIM-SSM Multicast Listener Discovery (MLD) - replaces IGMP IGMPv2 == MLD IGMPv3 == MLDv2. IPv6 Multicast Technology. ASM - Any Source Multicast what you’re used to in IPv4 but. . . no MSDP?!

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IPv6 Multicast Technology

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  1. IPv6 Multicast Technology Protocols: • multicast BGP • PIM Sparse Mode and PIM-SSM • Multicast Listener Discovery (MLD) - replaces IGMP • IGMPv2 == MLD • IGMPv3 == MLDv2

  2. IPv6 Multicast Technology ASM - Any Source Multicast • what you’re used to in IPv4 • but. . . no MSDP?! • one global Rendezvous Point (RP)

  3. IPv6 Multicast Technology SSM - Source-Specific Multicast • the next big thing in IPv4 and IPv6 • source is discovered out of band • limited OS and application support • Cisco DNS mapping - a useful hack, for now

  4. IPv6 Multicast Technology Embedded-RP • only possible with v6’s huge addresses • RP is encoded in the group address • no stack or app support needed • to be turned on. . . soon? • requires pre-planning for your RP address • still in draft

  5. Current Status The m6bone • RP and main tunnel router at RENATER • tunnels to lots of places • mostly software-based routers and PCs

  6. But we need Native! Tunnels have lots of problems: • encap/decap hits router CPU • tunnel overhead adds to b/w use • tunnels concentrate the utilization, mostly defeating the point of multicast • lots of points of failure

  7. Progress on native connections • GÉANT • SURFnet, SWITCH, GRnet, FCCN, NORDUnet, RedIRIS, HUNGARNET, GARR • UNINETT, FUNET, CESGA, CESCA • Endpoints - Østfold University College, SWITCH, UNINETT RedIRIS (and probably others) • Abilene • NYSERNet, Merit • Endpoints - NYSERNet Office, NYU, I2 Ann Arbor

  8. Demonstration Setup NYSERNet Syracuse NYU LAN 6500 Office 7609 Edge 7600 Abilene NYCM T640 Syracuse 7609 to WASH NYC 12410

  9. Demonstration Setup Internet2 Ann Arbor HP switch Internet2 M10 Abilene CHIN T640 Abilene IPLS T640 to NYCM Merit Juniper

  10. Demonstration Setup Member Meeting - Philadelphia Abilene WASH T640 Meeting M320 Force10 switch Extreme switch

  11. Demonstration Sources NYSERNet Syracuse • Mac desktop, DVTS with external DV converter, analog camera New York University • Mac Mini, VideoLAN with stored video Internet2 Ann Arbor • WinXP PC, Conference XP with camera • Mac Mini, DVTS with DV camera

  12. Bumps in the Road • limited experience - network engineers, vendor support, application developers • limited toolset - loss testing, fault isolation • everything is new • everything is recent • equipment limitations, bugs, incomplete features

  13. Bumps in the Road • switch flooding - this is a big one! But help is coming, and things will get better as we add more endpoints (hint, hint!)

  14. Why? • to build experience and expertise • to drive features and fixes • to encourage developers to add support • because IPv6 won’t be accepted if it can’t do multicast • because we can! • and someday soon we’ll need to. . .

  15. Resources • Internet2 groups: • http://multicast.internet2.edu • http://ipv6.internet2.edu • bigvideo: http://www.researchchannel.org/projects/i2wg/prj_bigv.asp • m6bone: http://www.m6bone.net • Cisco and Juniper documentation

  16. Resources • Applications: • VideoLAN http://www.videolan.org • DVTS http://www.sfc.wide.ad.jp/DVTS/ http://apps.internet2.edu/dvts.html • dbeacon http://artemis.av.it.pt/~hsantos/dbeacon/ • ssmping http://www.venaas.no/multicast/ssmping/ • ConferenceXP

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