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How do the IPv6 autoconfiguration and numbering features work? What is their purpose?
Solution
*IPv6 Autoconfiguration:Autoconfiguration is very useful feature and solution because it allows
to devices on a network to address themselve with link-local unicast address.
*There are two types of Autoconfiguration:
1]Stateless configuration :i)In this, configuration of address and other setting is depend on the
reciept of router advertisement message.
ii)The router advertisement message have the managed address configuration and other stateless
configuration flags set to 0 & they also have one or more prefix information option with it's
autonomous flags set to1.
2]Statefull configuration:i)It is baed on use of address configuration protocol like DHCPv6,to
obtain address and other configuration settings.
ii0 A host can use statefull autoconfiguration when there are no router present on the local link
and when it receives a router advertisement message with no prefix information option and the
managed address configuration flag set to1.
#IPv6 Autoconfiguration process:
1]A provisiona l link-local address is derived based on the link-local prefix of FE80::10 and a
EUI-64-derived interface identifier.
2]To verify the uniqueness of the provisional link-local address use duplicate address detection.
3]A neighbor solicitation message is sent with target address field that is to provisional link-local
address.
4]If a neighbor advertisment message is recieved this indicate that another node on the local link
is using the provisional link-local address and addressconfiguration stops.
5]If a neighbor advertisement message is not received ,the provisional link-local address is
assumed to be unique and valid.The link-local address is initialized for the interface.
*IPv6 Device renumbering:
1]Renumbering of device is a method related to the autoconfiguration.
2]It can be implemented using protocol like DHCP,by using the ip address leases that expired
after a period of time.
3]In IPv6 when autoconfiguration is done,network can be renumbered by routersspecify an
expiration interval for network prefix.
4]Then they send a new prefix to tell device to regenerate their IP address.
5}Devices maintain the old deprecate address for sometime and then move to new address.

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How do the IPv6 autoconfiguration and numbering features work What .pdf

  • 1. How do the IPv6 autoconfiguration and numbering features work? What is their purpose? Solution *IPv6 Autoconfiguration:Autoconfiguration is very useful feature and solution because it allows to devices on a network to address themselve with link-local unicast address. *There are two types of Autoconfiguration: 1]Stateless configuration :i)In this, configuration of address and other setting is depend on the reciept of router advertisement message. ii)The router advertisement message have the managed address configuration and other stateless configuration flags set to 0 & they also have one or more prefix information option with it's autonomous flags set to1. 2]Statefull configuration:i)It is baed on use of address configuration protocol like DHCPv6,to obtain address and other configuration settings. ii0 A host can use statefull autoconfiguration when there are no router present on the local link and when it receives a router advertisement message with no prefix information option and the managed address configuration flag set to1. #IPv6 Autoconfiguration process: 1]A provisiona l link-local address is derived based on the link-local prefix of FE80::10 and a EUI-64-derived interface identifier. 2]To verify the uniqueness of the provisional link-local address use duplicate address detection. 3]A neighbor solicitation message is sent with target address field that is to provisional link-local address. 4]If a neighbor advertisment message is recieved this indicate that another node on the local link is using the provisional link-local address and addressconfiguration stops. 5]If a neighbor advertisement message is not received ,the provisional link-local address is assumed to be unique and valid.The link-local address is initialized for the interface. *IPv6 Device renumbering: 1]Renumbering of device is a method related to the autoconfiguration. 2]It can be implemented using protocol like DHCP,by using the ip address leases that expired after a period of time. 3]In IPv6 when autoconfiguration is done,network can be renumbered by routersspecify an expiration interval for network prefix. 4]Then they send a new prefix to tell device to regenerate their IP address. 5}Devices maintain the old deprecate address for sometime and then move to new address.