Multicast and IPv6 - Stanford Secure Computer Systems Group

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Anycast• Communicate with “any” one of a set of nodes• We’ve seen this with DNS\$ dig www.google.com...;; ANSWER SECTION:www.google.com. 604799 IN CNAME www.l.google.com.www.l.google.com. 300 IN A 74.125.19.103www.l.google.com. 300 IN A 74.125.19.104www.l.google.com. 300 IN A 74.125.19.147www.l.google.com. 300 IN A 74.125.19.99
Anycast at IP layer• DNS allows anycast through name → addressmappings• Sometimes we need it at layer 3 itself- Single IP address refers to multiple hosts- Need to talk to any one of them• Example: DNS root servers- Would like to scale number of root servers with Internet- Can’t use DNS (remember root servers hard-coded)- Want to query closest root server
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 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: IP Anycast
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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