z/OS Communications Server: IPv6 Network and Application Design Guide
z/OS Communications Server: IPv6 Network and Application Design Guide
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IPv6 address states z/OS Communications Server: IPv6 Network and Application Design Guide SC27-3663-00 |
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An address state defines and controls how other algorithms work with a particular address. There are four IPv6 address states: tentative, deprecated, preferred, and unavailable. TentativeA tentative address is an address whose uniqueness on a link is being verified before it is assigned to the interface. A tentative address is not considered assigned to the interface in the usual sense. An interface discards received packets that are addressed to a tentative address, unless those packets are related to Duplicate Address Detection (DAD). For more information about DAD, see Duplicate address detection. DeprecatedA deprecated address is an address that is assigned to an interface, and use of the address is discouraged but not forbidden. Packets that are sent from or to deprecated addresses are delivered as expected. A deprecated address continues to be used as a source address in existing communications where switching to a preferred address would be disruptive. PreferredA preferred address is an address that is assigned to an interface, and use of the address is unrestricted. Preferred addresses can be used as the source or destination address of packets that are sent from or to the interface. UnavailableAn unavailable address is one that is not yet assigned to the interface. 
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