Multicast and IPv6 - Stanford Secure Computer Systems Group

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IPv6 Header Fields• Version, 4 bits: 6 for IPv6• Class: 8 bits: like TOSS in IPv4• Flow, 20 bits: identifies a flow• Length, 16 bits: datagram length• Next header, 8 bits: more later• Hop limit, 8 bits: like TTL in IPv4• Addresses: 128 bits
IPv6 Addresses• Simplify DHCP and autoconfiguration• Break 128 bits into 80-bit network and 48-bitinterface- Many link layers have unique interface addresses (more onthis later in quarter)- E.g., Ethernet is 48 bits- Use of 48-bit ID ensures no address collisions, makes DHCPstateless
Page 2 and 3: Overview• Next generation IP: IPv
Page 4: IPv6• Work started in 1994• Bas
Page 7: IPv6 HeaderVer Class FlowLength Nex
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 and 20: Fragmentation Revisited• High-los
Page 21 and 22: Link-layer reliability• High-loss
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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