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I pv6

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Thomas Setshedi

The document summarizes key aspects of IPv6 including: 1. IPv6 uses 128-bit addresses compared to 32-bit addresses in IPv4 and eliminates leading zeros in blocks of numbers and replaces consecutive zeros with "::". 2. IPv6 addresses come in different formats like global unicast using an interface ID, link-local unicast using an interface ID, and multicast using a scope and group ID. 3. The IPv6 header is similar to IPv4 but uses a 64-bit flow label field and has extension headers for additional functions like routing, fragmentation, and security.

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IPV6 packetlife.net Protocol Header Address Notation 8 16 24 32 Eliminate leading zeros from all two-byte sets Ver Traffic Class Flow Label Replace up to one string of consecutive zeros Payload Length Next Header Hop Limit with a double-colon (::) Address Formats Source Address Global unicast Global Prefix Subnet Interface ID Destination Address 48 16 64 Link-local unicast Version (4 bits) Always set to 6 Interface ID Traffic Class (8 bits) A DSCP value for QoS 64 64 Flow Label (20 bits) Identifies unique flows (optional) Multicast Payload Length (16 bits) Length of the payload in bytes Scope Flags Group ID Next Header (8 bits) Header or protocol which follows 8 4 4 112 Hop Limit (8 bits) Similar to IPv4's time to live field Source Address (128 bits) Source IP address EUI-64 Formation Destination Address (128 bits) Destination IP address MAC Address Types EUI-64 Unicast One-to-one communication Multicast One-to-many communication Insert 0xfffe between the two halves of the MAC Anycast An address configured in multiple locations Flip the seventh bit (universal/local flag) to 1 Multicast Scopes Extension Headers 1 Interface-local 5 Site-local Hop-by-hop Options (0) Carries additional information which must be examined by every 2 Link-local 8 Org-local router in the path 4 Admin-local E Global Routing (43) Provides source routing functionality Special-Use Ranges Fragment (44) ::/0 Default route Included when a packet has been fragmented by its source ::/128 Unspecified Encapsulating Security Payload (50) Provides payload encryption (IPsec) ::1/128 Loopback Authentication Header (51) ::/96 IPv4-compatible* Provides packet authentication (IPsec) ::FFFF:0:0/96 IPv4-mapped Destination Options (60) Carries additional information which pertains only to the recipient 2001::/32 Teredo 2001:DB8::/32 Documentation Transition Mechanisms Dual Stack 2002::/16 6to4 Transporting IPv4 and IPv6 across an infrastructure simultaneously FC00::/7 Unique local Tunneling FE80::/10 Link-local unicast IPv6 traffic is encapsulated into IPv4 using IPv6-in-IP, UDP (Teredo), or Intra-Site Automatic Tunnel Addressing Protocol (ISATAP) FEC0::/10 Site-local unicast* Translation FF00::/8 Multicast Stateless IP/ICMP Translation (SIIT) translates IP header fields, NAT * Deprecated Protocol Translation (NAT-PT) maps between IPv6 and IPv4 addresses by Jeremy Stretch v2.0

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I pv6

  • 1. IPV6 packetlife.net Protocol Header Address Notation 8 16 24 32 Eliminate leading zeros from all two-byte sets Ver Traffic Class Flow Label Replace up to one string of consecutive zeros Payload Length Next Header Hop Limit with a double-colon (::) Address Formats Source Address Global unicast Global Prefix Subnet Interface ID Destination Address 48 16 64 Link-local unicast Version (4 bits) Always set to 6 Interface ID Traffic Class (8 bits) A DSCP value for QoS 64 64 Flow Label (20 bits) Identifies unique flows (optional) Multicast Payload Length (16 bits) Length of the payload in bytes Scope Flags Group ID Next Header (8 bits) Header or protocol which follows 8 4 4 112 Hop Limit (8 bits) Similar to IPv4's time to live field Source Address (128 bits) Source IP address EUI-64 Formation Destination Address (128 bits) Destination IP address MAC Address Types EUI-64 Unicast One-to-one communication Multicast One-to-many communication Insert 0xfffe between the two halves of the MAC Anycast An address configured in multiple locations Flip the seventh bit (universal/local flag) to 1 Multicast Scopes Extension Headers 1 Interface-local 5 Site-local Hop-by-hop Options (0) Carries additional information which must be examined by every 2 Link-local 8 Org-local router in the path 4 Admin-local E Global Routing (43) Provides source routing functionality Special-Use Ranges Fragment (44) ::/0 Default route Included when a packet has been fragmented by its source ::/128 Unspecified Encapsulating Security Payload (50) Provides payload encryption (IPsec) ::1/128 Loopback Authentication Header (51) ::/96 IPv4-compatible* Provides packet authentication (IPsec) ::FFFF:0:0/96 IPv4-mapped Destination Options (60) Carries additional information which pertains only to the recipient 2001::/32 Teredo 2001:DB8::/32 Documentation Transition Mechanisms Dual Stack 2002::/16 6to4 Transporting IPv4 and IPv6 across an infrastructure simultaneously FC00::/7 Unique local Tunneling FE80::/10 Link-local unicast IPv6 traffic is encapsulated into IPv4 using IPv6-in-IP, UDP (Teredo), or Intra-Site Automatic Tunnel Addressing Protocol (ISATAP) FEC0::/10 Site-local unicast* Translation FF00::/8 Multicast Stateless IP/ICMP Translation (SIIT) translates IP header fields, NAT * Deprecated Protocol Translation (NAT-PT) maps between IPv6 and IPv4 addresses by Jeremy Stretch v2.0