ipv6 Flashcards
Unspecified Address
::
Loopback
::1
Global Unicast Range
2000::/3
Unique Local Unicast
FC00::/7
Link-Local Unicast
FE80::/10
Multicast
FF00::/8
Modified EUI-64
/64 address using the mac-address with the U/L bit flipped. The format is using the OUI (with U/L bit flipped) following by FFFE followed by the remainder of the MAC
SLAAC
Stateless Address Autoconfiguration
SLAAC States
Tentative, Preferred, Depreciated, Valid, Invalid
DAD
Duplicate Address Detection
Unique Local Unicast Format
< 7 bits >< 40 bits >< 16 bits >< 64 bits >
IPv4 Embedded Address Format
IPv4-Capatible IPv6 Address
<80 bits><16 bits><32 bits>
:: 0000 :w.x.y.z
IPv4-Mapped IPv6 Address
<80 bits><16 bits><32 bits>
:: FFFF :w.x.y.zMulticast Format
< 8 bits ><4 bits>< 4 bits >< 112 bits >
< Flag >
Multicast Scope
0 = Reserved 1=Interface-Local Scope 2=Link-Local Scope 3=Unicast-prefix-based address 4=Admin-Local Scope 5=Site-Local Scope 6=Unassigned 7=Rendezvous Point Flag 8=Organizational-Local Scope 9=Unassigned A=Unassigned B=Unassigned C=Unassigned D=Unassigned E=Global Scope F=Reserved
Solicited-Node Multicast Address
FF02:0:0:0:0:1:FF00:://104 where the last 24 bits are from the address. There is a Solicited-Node Multicast address for each Link-Local and Global Address assigned.
DHCPv6 Address
Link-Local: FF02::1:2
Site-Local: FF05::1:2
DHCPv6 Message Types
1=Solicit 2=Advertise 3=Request 4=Confirm 5=Renew 6=Rebind 7=Reply 8=Release 9=Decline 10=Reconfigure 11=Information-Request 12=Relay-Forw 13=Relay-Repl
DHCPv6 Rapid-Commit Option
Allows DHCPv6 to work with only a solicit and reply message but only works if there is only 1 DHCPv6 server. Otherwise every DHCPv6 server assigns an address but only one is actually used, the one first received.
IPv6 Tunnel Types
Manual
IPv4-Compatible (Cisco does not recommend)
6to4
ISATAP
6to4 Tunnels
Dynamic Multipoint tunnels that require IPv6 destination addresses be in the 2002::/16 range. Addresses are reverse engineered from IPv4 tunnel endpoint address as: 2002:::/48
ISATAP Tunnels
Tunnel address must use EUI-64 and assigns client addresses via SLAAC. The EUI-64 address uses special ISATAP IANA assigned code of 0000:5EFE. The last 32 bits of the IPv6 address are the Ipv4 address of the tunnel endpoint. The address format is below
<0000:5EFE>
Well-known Link-Local Multicast
FF02::1 All Nodes FF02::2 All Routers FF02::5 All OSPF Routers FF02::6 All OSPF DR Routers FF02::A All EIGRP Routers FF02::9 All ISIS Routers
Embedded RP Schema
FF7:0:<64-bit RP Prefix>:<32 bit group ID>:<1-f>
