Multicast and IPv6 - Stanford Secure Computer Systems Group

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Fragmentation Revisited, Continued• If a packet has four fragments, deliveryprobability is 0.35 4 ≈ 1.4%• Total transmissions/delivery = 10.014 · ∑9i=0 0.9 i• Total transmissions/delivery = 65 · 6.5 = 423• Fragmentation header in <strong>IPv6</strong> is a destinationheader- Fragmentation is possible, but must be done at the source
Link-layer reliability• High-loss link layers usually have single-hop acks<strong>and</strong> retransmissions- End-to-end argument: when can layer 2 reliability failend-to-end?• 10-hop route, each link has a 10% drop rate- Expect10.9≈ 1.1 transmissions/link- 10 links, 11 transmissions- 44 transmissions/delivery
Page 2 and 3: Overview• Next generation IP: IPv
Page 4: IPv6• Work started in 1994• Bas
Page 7 and 8: IPv6 HeaderVer Class FlowLength Nex
Page 9 and 10: IPv6 Addresses• Simplify DHCP and
Page 11 and 12: v4 Interoperability, continued• T
Page 13 and 14: IP Tunneling• Encapsulate an IP p
Page 15 and 16: Other Tunneling Use: VPN• Virtual
Page 17 and 18: Example Next Header Values• 0: Ho
Page 19: Fragmentation Revisited• High-los
Page 23 and 24: IPv4 Status
Page 25 and 26: Flaw in the Argument• Original IP
Page 27 and 28: 6lowpan and the Internet of Things
Page 29 and 30: 6lowpan• IETF working group on IP
Page 31 and 32: 6lowpan Header Compression• draft
Page 33 and 34: 2-minute stretch
Page 35 and 36: Multicast Approach• Nodes can joi
Page 37 and 38: Network TopologyBAR1R2R3R4R5CR6R7
Page 39 and 40: Tree for B as Multicast SourceBAR1R
Page 41 and 42: IP Anycast
Page 43 and 44: Anycast at IP layer• DNS allows a
Page 45 and 46: • A /32 routing entry!The Cost•
Page 47: Overview• Next generation IP: IPv

Multicast and IPv6 - Stanford Secure Computer Systems Group

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